feat(abilities): show cooling controls

.gitea/workflows/ci.yml

@@ -2,6 +2,8 @@ name: CI
 
 on:
   push:
+    branches-ignore: [main]
+    tags-ignore: ['**']
   pull_request:
 
 jobs:

.gitea/workflows/release.yml

@@ -96,9 +96,11 @@ jobs:
         uses: actions/upload-artifact@ff15f0306b3f739f7b6fd43fb5d26cd321bd4de5 # v3
         with:
           name: purpur-fantasy-stick-${{ steps.release.outputs.version }}
-          path: build/libs/purpur-fantasy-stick-${{ steps.release.outputs.version }}.jar
+          path: |
+            build/libs/purpur-fantasy-stick-${{ steps.release.outputs.version }}.jar
+            build/distributions/purpur-fantasy-stick-${{ steps.release.outputs.version }}-resource-pack.zip
           if-no-files-found: error
-      - name: Publish verified JAR through a draft release
+      - name: Publish verified JAR and resource pack through a draft release
         if: steps.release.outputs.created == 'true'
         env:
           RELEASE_CREDENTIAL: ${{ secrets.RELEASE_TOKEN }}

build.gradle.kts

@@ -1,5 +1,6 @@
 import java.net.URI
 import java.security.MessageDigest
+import org.gradle.api.tasks.bundling.Zip
 
 plugins {
     java
@@ -7,6 +8,7 @@ plugins {
 
 group = "games.dmg"
 version = providers.gradleProperty("releaseVersion").orElse("0.1.0-SNAPSHOT").get()
+val pluginVersion = version.toString()
 
 repositories {
     mavenCentral()
@@ -33,11 +35,43 @@ dependencies {
     testRuntimeOnly("org.junit.platform:junit-platform-launcher")
 }
 
+val resourcePackInput = layout.buildDirectory.dir("generated/resource-pack-input")
+val prepareResourcePack = tasks.register<Copy>("prepareResourcePack") {
+    from("src/resourcePack")
+    into(resourcePackInput)
+    filesMatching("pack.mcmeta") { expand("version" to pluginVersion) }
+}
+val sheetResourcePack = tasks.register<Zip>("sheetResourcePack") {
+    dependsOn(prepareResourcePack)
+    from(resourcePackInput)
+    archiveFileName.set("purpur-fantasy-stick-$pluginVersion-resource-pack.zip")
+    destinationDirectory.set(layout.buildDirectory.dir("distributions"))
+    isPreserveFileTimestamps = false
+    isReproducibleFileOrder = true
+}
+val resourcePackMetadata = layout.buildDirectory.dir("generated/resource-pack-metadata")
+val generateResourcePackMetadata = tasks.register("generateResourcePackMetadata") {
+    dependsOn(sheetResourcePack)
+    inputs.file(sheetResourcePack.flatMap { it.archiveFile })
+    inputs.property("pluginVersion", pluginVersion)
+    outputs.file(resourcePackMetadata.map { it.file("sheet-resource-pack.properties") })
+    doLast {
+        val pack = sheetResourcePack.get().archiveFile.get().asFile
+        val sha1 = MessageDigest.getInstance("SHA-1").digest(pack.readBytes()).joinToString("") { "%02x".format(it) }
+        val version = pluginVersion
+        val output = resourcePackMetadata.get().file("sheet-resource-pack.properties").asFile
+        output.parentFile.mkdirs()
+        output.writeText("url=https://git.garvis.dev/dmg/purpur-fantasy-stick/releases/download/v$version/purpur-fantasy-stick-$version-resource-pack.zip\nsha1=$sha1\n")
+    }
+}
+sourceSets.main.get().resources.srcDir(resourcePackMetadata)
+
 tasks.test {
     useJUnitPlatform()
-    dependsOn(tasks.jar)
+    dependsOn(tasks.jar, sheetResourcePack)
     systemProperty("distribution.jar", tasks.jar.get().archiveFile.get().asFile.absolutePath)
-    systemProperty("distribution.version", project.version.toString())
+    systemProperty("distribution.version", pluginVersion)
+    systemProperty("resource.pack.zip", sheetResourcePack.get().archiveFile.get().asFile.absolutePath)
 }
 
 // Patch the exact supported runtime for non-listening native API tests, as in Purpur Base.
@@ -88,13 +122,14 @@ nativeTest.compileClasspath += sourceSets.main.get().output + nativeRuntimeJars
 nativeTest.runtimeClasspath += sourceSets.main.get().output + nativeRuntimeJars
 val nativeCompatibilityTest = tasks.register<Test>("nativeCompatibilityTest") {
     description = "Verifies packaged metadata and native item serialization without starting a server"
-    dependsOn(tasks.jar)
+    dependsOn(tasks.jar, sheetResourcePack)
     testClassesDirs = nativeTest.output.classesDirs
     classpath = nativeTest.runtimeClasspath
     useJUnitPlatform()
     maxHeapSize = "1G"
     workingDir(nativeRuntime)
     systemProperty("distribution.jar", tasks.jar.get().archiveFile.get().asFile.absolutePath)
+    systemProperty("resource.pack.zip", sheetResourcePack.get().archiveFile.get().asFile.absolutePath)
 }
 val installReleaseTools = tasks.register<Exec>("installReleaseTools") {
     commandLine("npm", "ci", "--ignore-scripts", "--no-audit", "--no-fund")
@@ -105,9 +140,8 @@ val releaseToolCheck = tasks.register<Exec>("releaseToolCheck") {
 }
 tasks.check { dependsOn(nativeCompatibilityTest, releaseToolCheck) }
 
-val pluginVersion = version
-
 tasks.processResources {
+    dependsOn(generateResourcePackMetadata)
     inputs.property("pluginVersion", pluginVersion)
     filesMatching("plugin.yml") {
         expand("version" to pluginVersion)

scripts/publish-release.ts

@@ -9,8 +9,9 @@ try {
   if (!/^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)$/.test(version)
       || !credential || !/^[a-f0-9]{40}$/.test(commit)) throw new Error("Invalid input");
   const jar = await readFile(`build/libs/purpur-fantasy-stick-${version}.jar`);
+  const resourcePack = await readFile(`build/distributions/purpur-fantasy-stick-${version}-resource-pack.zip`);
   await publishRelease({
-    credential, version, commit, jar,
+    credential, version, commit, jar, resourcePack,
     notes: process.env.RELEASE_NOTES ?? "See the source history for changes.",
   }, fetch);
   console.log(`Published purpur-fantasy-stick v${version}.`);

scripts/release-client.test.ts

@@ -8,12 +8,15 @@ const input: ReleaseInput = {
   commit: "a".repeat(40),
   notes: "Verified changes",
   jar: new Uint8Array([0x50, 0x4b, 0x03, 0x04]),
+  resourcePack: new Uint8Array([0x50, 0x4b, 0x03, 0x05]),
 };
 
-function success(init: RequestInit): Response {
+function success(init: RequestInit, url = ""): Response {
+  const pack = url.includes("resource-pack.zip");
   return Response.json({
     id: 42, draft: init.method !== "PATCH", tag_name: "v1.2.3",
-    name: "purpur-fantasy-stick-1.2.3.jar", size: input.jar.length,
+    name: pack ? "purpur-fantasy-stick-1.2.3-resource-pack.zip" : "purpur-fantasy-stick-1.2.3.jar",
+    size: pack ? input.resourcePack.length : input.jar.length,
   });
 }
 
@@ -21,7 +24,7 @@ test("creates a draft on the fixed repository and exact source commit, without f
   const calls: { url: string; init: RequestInit }[] = [];
   const id = await publishRelease(input, async (url, init) => {
     calls.push({ url, init });
-    return success(init);
+    return success(init, url);
   });
   assert.ok(calls.length >= 1);
   const first = calls[0]!;
@@ -40,17 +43,21 @@ test("uploads the exact versioned bytes before publishing the draft", async () =
   const calls: { url: string; init: RequestInit }[] = [];
   await publishRelease(input, async (url, init) => {
     calls.push({ url, init });
-    return success(init);
+    return success(init, url);
   });
-  assert.equal(calls.length, 3);
+  assert.equal(calls.length, 4);
   assert.equal(calls[1]!.url,
     "https://git.garvis.dev/api/v1/repos/dmg/purpur-fantasy-stick/releases/42/assets?name=purpur-fantasy-stick-1.2.3.jar");
   assert.equal(calls[1]!.init.method, "POST");
   assert.deepEqual(new Uint8Array(await new Response(calls[1]!.init.body).arrayBuffer()), input.jar);
   assert.equal(new Headers(calls[1]!.init.headers).get("content-type"), "application/octet-stream");
-  assert.equal(calls[2]!.init.method, "PATCH");
-  assert.equal(calls[2]!.url, "https://git.garvis.dev/api/v1/repos/dmg/purpur-fantasy-stick/releases/42");
-  assert.deepEqual(JSON.parse(String(calls[2]!.init.body)), { draft: false });
+  assert.equal(calls[2]!.url,
+    "https://git.garvis.dev/api/v1/repos/dmg/purpur-fantasy-stick/releases/42/assets?name=purpur-fantasy-stick-1.2.3-resource-pack.zip");
+  assert.equal(calls[2]!.init.method, "POST");
+  assert.deepEqual(new Uint8Array(await new Response(calls[2]!.init.body).arrayBuffer()), input.resourcePack);
+  assert.equal(calls[3]!.init.method, "PATCH");
+  assert.equal(calls[3]!.url, "https://git.garvis.dev/api/v1/repos/dmg/purpur-fantasy-stick/releases/42");
+  assert.deepEqual(JSON.parse(String(calls[3]!.init.body)), { draft: false });
   for (const call of calls) {
     assert.equal(call.init.redirect, "error");
     assert.equal(new Headers(call.init.headers).get("authorization"), `token ${input.credential}`);
@@ -58,14 +65,14 @@ test("uploads the exact versioned bytes before publishing the draft", async () =
   }
 });
 
-for (const failureStep of [1, 2, 3]) {
+for (const failureStep of [1, 2, 3, 4]) {
   for (const status of [302, 401, 409, 500]) {
     test(`stops at step ${failureStep} on HTTP ${status} without leaking API error bodies`, async () => {
       let calls = 0;
       await assert.rejects(publishRelease(input, async (_url, init) => {
         calls++;
         if (calls === failureStep) return new Response(input.credential, { status });
-        return success(init);
+        return success(init, _url);
       }), (error: unknown) => {
         assert.ok(error instanceof Error);
         assert.ok(error.message.includes(String(status)));
@@ -85,7 +92,7 @@ test("sanitizes transport errors and does not follow a redirect with the credent
 
 for (const invalid of [
   { credential: "" }, { credential: "header\r\ninjection" }, { version: "../../latest" },
-  { version: "1.0.0-SNAPSHOT" }, { commit: "main" }, { jar: new Uint8Array() },
+  { version: "1.0.0-SNAPSHOT" }, { commit: "main" }, { jar: new Uint8Array() }, { resourcePack: new Uint8Array() },
 ]) {
   test(`rejects invalid ${Object.keys(invalid)[0]} before any network request`, async () => {
     let calls = 0;
@@ -112,16 +119,18 @@ for (const body of ["not JSON", "null", JSON.stringify({ id: -1 }), JSON.stringi
 for (const [failureStep, body] of [
   [2, {}], [2, { name: "other.jar", size: 4 }],
   [2, { name: "purpur-fantasy-stick-1.2.3.jar", size: 0 }],
-  [3, { id: 42, draft: true, tag_name: "v1.2.3" }],
-  [3, { id: 77, draft: false, tag_name: "v1.2.3" }],
-  [3, { id: 42, draft: false, tag_name: "v8.8.8" }],
+  [3, {}], [3, { name: "other.zip", size: 4 }],
+  [3, { name: "purpur-fantasy-stick-1.2.3-resource-pack.zip", size: 0 }],
+  [4, { id: 42, draft: true, tag_name: "v1.2.3" }],
+  [4, { id: 77, draft: false, tag_name: "v1.2.3" }],
+  [4, { id: 42, draft: false, tag_name: "v8.8.8" }],
 ] as const) {
   test(`requires a matching asset and completed publication: ${JSON.stringify(body)}`, async () => {
     let calls = 0;
     await assert.rejects(publishRelease(input, async (_url, init) => {
       calls++;
-      return calls === failureStep ? Response.json(body) : success(init);
-    }), { message: failureStep === 2 ? "Invalid release asset response." : "Invalid published release response." });
+      return calls === failureStep ? Response.json(body) : success(init, _url);
+    }), { message: failureStep === 2 || failureStep === 3 ? "Invalid release asset response." : "Invalid published release response." });
     assert.equal(calls, failureStep);
   });
 }

scripts/release-client.ts

@@ -4,6 +4,7 @@ export interface ReleaseInput {
   commit: string;
   notes: string;
   jar: Uint8Array;
+  resourcePack: Uint8Array;
 }
 
 export type Request = (url: string, init: RequestInit) => Promise<Response>;
@@ -13,7 +14,7 @@ const releases = "https://git.garvis.dev/api/v1/repos/dmg/purpur-fantasy-stick/r
 export async function publishRelease(input: ReleaseInput, request: Request): Promise<number> {
   if (!/^[\x21-\x7e]+$/.test(input.credential)
       || !/^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)$/.test(input.version)
-      || !/^[a-f0-9]{40}$/.test(input.commit) || input.jar.length === 0) {
+      || !/^[a-f0-9]{40}$/.test(input.commit) || input.jar.length === 0 || input.resourcePack.length === 0) {
     throw new Error("Invalid release input.");
   }
   const send: Request = async (url, init) => {
@@ -49,6 +50,16 @@ export async function publishRelease(input: ReleaseInput, request: Request): Pro
   if (asset.name !== `purpur-fantasy-stick-${input.version}.jar` || asset.size !== input.jar.length) {
     throw new Error("Invalid release asset response.");
   }
+  const packName = `purpur-fantasy-stick-${input.version}-resource-pack.zip`;
+  const packResponse = await send(`${releases}/${release.id}/assets?name=${packName}`, {
+    method: "POST", redirect: "error",
+    headers: { authorization: `token ${input.credential}`, "content-type": "application/octet-stream" },
+    body: new Uint8Array(input.resourcePack).buffer,
+  });
+  const pack = await readObject(packResponse, "Invalid release asset response.");
+  if (pack.name !== packName || pack.size !== input.resourcePack.length) {
+    throw new Error("Invalid release asset response.");
+  }
   const publishedResponse = await send(`${releases}/${release.id}`, {
     method: "PATCH", redirect: "error",
     headers: { authorization: `token ${input.credential}`, "content-type": "application/json" },

src/main/java/games/dmg/fantasystick/FantasyStickPlugin.java

@@ -9,6 +9,7 @@ import games.dmg.fantasystick.crafting.CharacterAnvilNames;
 import games.dmg.fantasystick.crafting.ManualCraftingController;
 import games.dmg.fantasystick.crafting.ManualCraftingGuard;
 import games.dmg.fantasystick.crafting.PlayerSheetDrops;
+import games.dmg.fantasystick.crafting.RecipeDiscovery;
 import games.dmg.fantasystick.items.CharacterSheets;
 import games.dmg.fantasystick.persistence.CharacterStorage;
 import games.dmg.fantasystick.persistence.EquipmentSessionStore;
@@ -18,15 +19,17 @@ import games.dmg.fantasystick.session.EquipmentSessions;
 import games.dmg.fantasystick.persistence.YamlCharacterRepository;
 import games.dmg.fantasystick.progression.ProgressionRules;
 import java.time.Clock;
+import java.util.List;
 import java.util.logging.Level;
 import org.bukkit.plugin.java.JavaPlugin;
 
-/** Crafting, native fantasy sessions, books, parties and names; progression actions and spells remain separate. */
+/** Crafting, native fantasy sessions, books, parties, names and permanent-stat progression. */
 public final class FantasyStickPlugin extends JavaPlugin {
     private CharacterStorage characters;
     private ManualCraftingController crafting;
     private ManualCraftingGuard guard;
     private CharacterAnvilNames anvilNames;
+    private RecipeDiscovery recipeDiscovery;
     private boolean recipeRegistered;
     private EquipmentSessionStore receipts;
     private EquipmentSessions sessions;
@@ -44,6 +47,60 @@ public final class FantasyStickPlugin extends JavaPlugin {
     private games.dmg.fantasystick.session.AdventureModeLease gameModes;
     private games.dmg.fantasystick.session.SessionVitals vitals;
     private games.dmg.fantasystick.session.SessionVisuals sessionVisuals;
+    private games.dmg.fantasystick.combat.BasicAttack basicAttack;
+    private games.dmg.fantasystick.party.CombatExperience combatExperience;
+    private games.dmg.fantasystick.ability.AbilityRegistry abilityRegistry;
+    private games.dmg.fantasystick.ability.AbilityEngine abilityEngine;
+    private games.dmg.fantasystick.ability.Fireball fireball;
+    private games.dmg.fantasystick.ability.FrostShard frostShard;
+    private games.dmg.fantasystick.persistence.FrostShardSettings frostShardSettings;
+    private games.dmg.fantasystick.ability.Longbow longbow;
+    private games.dmg.fantasystick.persistence.LongbowSettings longbowSettings;
+    private games.dmg.fantasystick.ability.Quickstep quickstep;
+    private games.dmg.fantasystick.persistence.QuickstepSettings quickstepSettings;
+    private games.dmg.fantasystick.ability.SecondWind secondWind;
+    private games.dmg.fantasystick.persistence.SecondWindSettings secondWindSettings;
+    private games.dmg.fantasystick.ability.CombatMitigation combatMitigation;
+    private games.dmg.fantasystick.ability.StoneSkin stoneSkin;
+    private games.dmg.fantasystick.ability.ShieldBash shieldBash;
+    private games.dmg.fantasystick.ability.OutgoingDamageMitigation outgoingDamageMitigation;
+    private games.dmg.fantasystick.ability.Hex hex;
+    private games.dmg.fantasystick.ability.TemporaryHealth temporaryHealth;
+    private games.dmg.fantasystick.ability.Inspire inspire;
+    private games.dmg.fantasystick.persistence.InspireSettings inspireSettings;
+    private games.dmg.fantasystick.ability.MendingLight mendingLight;
+    private games.dmg.fantasystick.persistence.MendingLightSettings mendingLightSettings;
+    private games.dmg.fantasystick.ability.Purify purify;
+    private games.dmg.fantasystick.persistence.PurifySettings purifySettings;
+    private games.dmg.fantasystick.ability.GuardianBond guardianBond;
+    private games.dmg.fantasystick.persistence.GuardianBondSettings guardianBondSettings;
+    private games.dmg.fantasystick.ability.OutgoingDamageBonus outgoingDamageBonus;
+    private games.dmg.fantasystick.ability.RallyingCry rallyingCry;
+    private games.dmg.fantasystick.persistence.RallyingCrySettings rallyingCrySettings;
+    private games.dmg.fantasystick.ability.FrostNova frostNova;
+    private games.dmg.fantasystick.persistence.FrostNovaSettings frostNovaSettings;
+    private games.dmg.fantasystick.ability.ChainLightning chainLightning;
+    private games.dmg.fantasystick.persistence.ChainLightningSettings chainLightningSettings;
+    private games.dmg.fantasystick.ability.Sanctuary sanctuary;
+    private games.dmg.fantasystick.persistence.SanctuarySettings sanctuarySettings;
+    private games.dmg.fantasystick.ability.WarBanner warBanner;
+    private games.dmg.fantasystick.persistence.WarBannerSettings warBannerSettings;
+    private games.dmg.fantasystick.ability.Meteor meteor;
+    private games.dmg.fantasystick.persistence.MeteorSettings meteorSettings;
+    private games.dmg.fantasystick.persistence.HexSettings hexSettings;
+    private games.dmg.fantasystick.persistence.ShieldBashSettings shieldBashSettings;
+    private games.dmg.fantasystick.persistence.StoneSkinSettings stoneSkinSettings;
+    private games.dmg.fantasystick.ability.GreatSword greatSword;
+    private games.dmg.fantasystick.ability.Revive revive;
+    private games.dmg.fantasystick.persistence.RevivalStore revivals;
+    private games.dmg.fantasystick.session.AdminRevival adminRevival;
+    private games.dmg.fantasystick.persistence.AdminReviveSettings adminReviveSettings;
+    private games.dmg.fantasystick.persistence.SwitchDelaySettings switchDelaySettings;
+    private games.dmg.fantasystick.persistence.RoleplaySettings roleplaySettings;
+    private games.dmg.fantasystick.persistence.PartySettings partySettings;
+    private games.dmg.fantasystick.persistence.SheetResourcePackSettings sheetResourcePackSettings;
+    private games.dmg.fantasystick.presentation.SheetResourcePack sheetResourcePack;
+    private games.dmg.fantasystick.session.NutritionPolicy nutritionPolicy;
     private java.util.concurrent.CompletionStage<Void> configurationDrain = java.util.concurrent.CompletableFuture.completedStage(null);
 
     @Override public void onEnable() {
@@ -66,10 +123,56 @@ public final class FantasyStickPlugin extends JavaPlugin {
             reloadConfig();
             var adventure = games.dmg.fantasystick.persistence.AdventureSettings.validate(getConfig().get("adventure-mode"));
             adventureSettings = new games.dmg.fantasystick.persistence.AdventureSettings(getDataFolder().toPath(), adventure);
-            var switchDelay = switchDelay();
-            var defaults = ProgressionRules.defaults();
-            var rules = new ProgressionRules(new java.math.BigInteger(getConfig().getString("starting-points", "40")),
-                defaults.xpPerLevel(), defaults.maximumLevel());
+            var switchDelay = games.dmg.fantasystick.persistence.SwitchDelaySettings.parse(
+                getConfig().get(games.dmg.fantasystick.persistence.SwitchDelaySettings.KEY));
+            var roleplayDisabled = games.dmg.fantasystick.persistence.RoleplaySettings.parse(
+                getConfig().get(games.dmg.fantasystick.persistence.RoleplaySettings.KEY));
+            var partyMaximum = games.dmg.fantasystick.persistence.PartySettings.parse(
+                getConfig().get(games.dmg.fantasystick.persistence.PartySettings.KEY));
+            var sheetPackDefaults = games.dmg.fantasystick.persistence.SheetResourcePackSettings.packagedDefaults();
+            sheetResourcePackSettings = new games.dmg.fantasystick.persistence.SheetResourcePackSettings(getDataFolder().toPath(),
+                getConfig().get(games.dmg.fantasystick.persistence.SheetResourcePackSettings.URL_KEY),
+                getConfig().get(games.dmg.fantasystick.persistence.SheetResourcePackSettings.SHA1_KEY), sheetPackDefaults);
+            var rules = progressionRules();
+            var rewardRules = combatRewardRules();
+            var fireballSettings = fireballSettings();
+            var greatSwordSettings = greatSwordSettings();
+            var frostShardConfiguration = frostShardConfiguration();
+            var frostShardInitial = games.dmg.fantasystick.persistence.FrostShardSettings.parse(frostShardConfiguration);
+            var longbowConfiguration = longbowConfiguration();
+            var longbowInitial = games.dmg.fantasystick.persistence.LongbowSettings.parse(longbowConfiguration);
+            var quickstepConfiguration = quickstepConfiguration();
+            var quickstepInitial = games.dmg.fantasystick.persistence.QuickstepSettings.parse(quickstepConfiguration);
+            var secondWindConfiguration = secondWindConfiguration();
+            var secondWindInitial = games.dmg.fantasystick.persistence.SecondWindSettings.parse(secondWindConfiguration);
+            var stoneSkinConfiguration = stoneSkinConfiguration();
+            var stoneSkinInitial = games.dmg.fantasystick.persistence.StoneSkinSettings.parse(stoneSkinConfiguration);
+            var shieldBashConfiguration = shieldBashConfiguration();
+            var shieldBashInitial = games.dmg.fantasystick.persistence.ShieldBashSettings.parse(shieldBashConfiguration);
+            var hexConfiguration = hexConfiguration();
+            var hexInitial = games.dmg.fantasystick.persistence.HexSettings.parse(hexConfiguration);
+            var inspireConfiguration = inspireConfiguration();
+            var inspireInitial = games.dmg.fantasystick.persistence.InspireSettings.parse(inspireConfiguration);
+            var mendingLightConfiguration = mendingLightConfiguration();
+            var mendingLightInitial = games.dmg.fantasystick.persistence.MendingLightSettings.parse(mendingLightConfiguration);
+            var purifyConfiguration = purifyConfiguration();
+            var purifyInitial = games.dmg.fantasystick.persistence.PurifySettings.parse(purifyConfiguration);
+            var guardianBondConfiguration = guardianBondConfiguration();
+            var guardianBondInitial = games.dmg.fantasystick.persistence.GuardianBondSettings.parse(guardianBondConfiguration);
+            var rallyingCryConfiguration = rallyingCryConfiguration();
+            var rallyingCryInitial = games.dmg.fantasystick.persistence.RallyingCrySettings.parse(rallyingCryConfiguration);
+            var frostNovaConfiguration = frostNovaConfiguration();
+            var frostNovaInitial = games.dmg.fantasystick.persistence.FrostNovaSettings.parse(frostNovaConfiguration);
+            var chainLightningConfiguration = chainLightningConfiguration();
+            var chainLightningInitial = games.dmg.fantasystick.persistence.ChainLightningSettings.parse(chainLightningConfiguration);
+            var sanctuaryConfiguration = sanctuaryConfiguration();
+            var sanctuaryInitial = games.dmg.fantasystick.persistence.SanctuarySettings.parse(sanctuaryConfiguration);
+            var warBannerConfiguration = warBannerConfiguration();
+            var warBannerInitial = games.dmg.fantasystick.persistence.WarBannerSettings.parse(warBannerConfiguration);
+            var meteorConfiguration = meteorConfiguration();
+            var meteorInitial = games.dmg.fantasystick.persistence.MeteorSettings.parse(meteorConfiguration);
+            var adminReviveTimeout = games.dmg.fantasystick.persistence.AdminReviveSettings.parse(
+                getConfig().get(games.dmg.fantasystick.persistence.AdminReviveSettings.KEY));
             var factory = new CharacterFactory();
             characters = new CharacterStorage(new YamlCharacterRepository(getDataFolder().toPath()), Clock.systemUTC());
             crafting = new ManualCraftingController(characters, () -> factory.create(rules),
@@ -106,27 +209,180 @@ public final class FantasyStickPlugin extends JavaPlugin {
                 getLogger().log(Level.WARNING, "Equipment transition/recovery for player " + problem.player()
                     + "; session " + problem.session(), problem.cause());
             gameModes = new games.dmg.fantasystick.session.AdventureModeLease();
+            switchDelaySettings = new games.dmg.fantasystick.persistence.SwitchDelaySettings(getDataFolder().toPath(), switchDelay);
+            roleplaySettings = new games.dmg.fantasystick.persistence.RoleplaySettings(getDataFolder().toPath(), roleplayDisabled);
+            partySettings = new games.dmg.fantasystick.persistence.PartySettings(getDataFolder().toPath(), partyMaximum);
+            sheetResourcePack = new games.dmg.fantasystick.presentation.SheetResourcePack(sheetResourcePackSettings,
+                (player, failure) -> getLogger().log(Level.WARNING, "Sheet resource-pack delivery failed for " + player, failure));
             sessions = new EquipmentSessions(characters, receipts, switchDelay, Clock.systemUTC(), nextTick,
                 notice -> notifyPlayer(generation, notice), diagnostics, presentation, adventureSettings::enabled, gameModes);
-            vitals = new games.dmg.fantasystick.session.SessionVitals();
-            sessions.attachVitals(vitals);
+            sessions.attachSwitchDelay(switchDelaySettings::delay);
+            sessions.attachRoleplayDisabled(roleplaySettings::disabled);
             parties = new games.dmg.fantasystick.party.PartyRoster(Clock.systemUTC(), id -> {
                 var player = getServer().getPlayer(id);
                 return player != null && player.isOnline();
-            });
+            }, partySettings::maximum);
             partyEvents = new games.dmg.fantasystick.party.PartyEvents(parties);
             partyCombat = new games.dmg.fantasystick.party.PartyCombat(parties, sessions);
-            books = new games.dmg.fantasystick.book.CharacterBookController(characters, rules, nextTick,
+            combatExperience = new games.dmg.fantasystick.party.CombatExperience(characters, rules, rewardRules,
+                sessions, Clock.systemUTC(), nextTick, id -> getServer().getPlayer(id),
+                problem -> getLogger().log(Level.WARNING, "Combat reward failed for character " + problem.character(), problem.cause()));
+            abilityRegistry = new games.dmg.fantasystick.ability.AbilityRegistry();
+            fireball = new games.dmg.fantasystick.ability.Fireball(fireballSettings);
+            frostShardSettings = new games.dmg.fantasystick.persistence.FrostShardSettings(
+                getDataFolder().toPath(), frostShardConfiguration);
+            frostShard = new games.dmg.fantasystick.ability.FrostShard(frostShardInitial);
+            longbowSettings = new games.dmg.fantasystick.persistence.LongbowSettings(
+                getDataFolder().toPath(), longbowConfiguration);
+            longbow = new games.dmg.fantasystick.ability.Longbow(longbowInitial);
+            quickstepSettings = new games.dmg.fantasystick.persistence.QuickstepSettings(
+                getDataFolder().toPath(), quickstepConfiguration);
+            quickstep = new games.dmg.fantasystick.ability.Quickstep(quickstepInitial,
+                event -> getServer().getPluginManager().callEvent(event));
+            secondWindSettings = new games.dmg.fantasystick.persistence.SecondWindSettings(
+                getDataFolder().toPath(), secondWindConfiguration);
+            secondWind = new games.dmg.fantasystick.ability.SecondWind(secondWindInitial, characters, sessions, nextTick,
+                event -> getServer().getPluginManager().callEvent(event), games.dmg.fantasystick.session.NativeHealthLimit::read);
+            stoneSkinSettings = new games.dmg.fantasystick.persistence.StoneSkinSettings(
+                getDataFolder().toPath(), stoneSkinConfiguration);
+            combatMitigation = new games.dmg.fantasystick.ability.CombatMitigation();
+            stoneSkin = new games.dmg.fantasystick.ability.StoneSkin(stoneSkinInitial, combatMitigation);
+            shieldBashSettings = new games.dmg.fantasystick.persistence.ShieldBashSettings(
+                getDataFolder().toPath(), shieldBashConfiguration);
+            shieldBash = new games.dmg.fantasystick.ability.ShieldBash(
+                shieldBashInitial,
+                event -> getServer().getPluginManager().callEvent(event));
+            outgoingDamageMitigation = new games.dmg.fantasystick.ability.OutgoingDamageMitigation(sessions, parties,
+                support -> combatExperience.support(support.target(), support.supportingCharacter(), support.aided(), support.amount()));
+            hexSettings = new games.dmg.fantasystick.persistence.HexSettings(getDataFolder().toPath(), hexConfiguration);
+            hex = new games.dmg.fantasystick.ability.Hex(hexInitial, outgoingDamageMitigation);
+            temporaryHealth = new games.dmg.fantasystick.ability.TemporaryHealth(sessions, parties, nextTick,
+                support -> combatExperience.support(support.target(), support.supportingCharacter(), support.aided(), support.amount()));
+            inspireSettings = new games.dmg.fantasystick.persistence.InspireSettings(getDataFolder().toPath(), inspireConfiguration);
+            inspire = new games.dmg.fantasystick.ability.Inspire(inspireInitial, temporaryHealth);
+            mendingLightSettings = new games.dmg.fantasystick.persistence.MendingLightSettings(
+                getDataFolder().toPath(), mendingLightConfiguration);
+            mendingLight = new games.dmg.fantasystick.ability.MendingLight(mendingLightInitial, characters, sessions, parties,
+                nextTick, event -> getServer().getPluginManager().callEvent(event),
+                games.dmg.fantasystick.session.NativeHealthLimit::read,
+                support -> combatExperience.support(support.supportingCharacter(), support.aided(), support.amount()));
+            purifySettings = new games.dmg.fantasystick.persistence.PurifySettings(getDataFolder().toPath(), purifyConfiguration);
+            purify = new games.dmg.fantasystick.ability.Purify(purifyInitial, sessions, parties,
+                support -> combatExperience.support(support.supportingCharacter(), support.aided(), support.amount()));
+            guardianBondSettings = new games.dmg.fantasystick.persistence.GuardianBondSettings(
+                getDataFolder().toPath(), guardianBondConfiguration);
+            guardianBond = new games.dmg.fantasystick.ability.GuardianBond(guardianBondInitial, sessions, parties,
+                support -> combatExperience.support(support.target(), support.supportingCharacter(), support.aided(), support.amount()));
+            outgoingDamageBonus = new games.dmg.fantasystick.ability.OutgoingDamageBonus(sessions, parties,
+                support -> combatExperience.support(support.target(), support.supportingCharacter(), support.aided(), support.amount()));
+            rallyingCrySettings = new games.dmg.fantasystick.persistence.RallyingCrySettings(
+                getDataFolder().toPath(), rallyingCryConfiguration);
+            rallyingCry = new games.dmg.fantasystick.ability.RallyingCry(
+                rallyingCryInitial, sessions, parties, outgoingDamageBonus);
+            frostNovaSettings = new games.dmg.fantasystick.persistence.FrostNovaSettings(
+                getDataFolder().toPath(), frostNovaConfiguration);
+            frostNova = new games.dmg.fantasystick.ability.FrostNova(frostNovaInitial, sessions, parties);
+            chainLightningSettings = new games.dmg.fantasystick.persistence.ChainLightningSettings(
+                getDataFolder().toPath(), chainLightningConfiguration);
+            chainLightning = new games.dmg.fantasystick.ability.ChainLightning(chainLightningInitial, sessions, parties);
+            sanctuarySettings = new games.dmg.fantasystick.persistence.SanctuarySettings(
+                getDataFolder().toPath(), sanctuaryConfiguration);
+            sanctuary = new games.dmg.fantasystick.ability.Sanctuary(sanctuaryInitial, characters, sessions, parties,
+                combatMitigation, nextTick, event -> getServer().getPluginManager().callEvent(event),
+                games.dmg.fantasystick.session.NativeHealthLimit::read,
+                support -> combatExperience.support(support.supportingCharacter(), support.aided(), support.amount()));
+            warBannerSettings = new games.dmg.fantasystick.persistence.WarBannerSettings(
+                getDataFolder().toPath(), warBannerConfiguration);
+            warBanner = new games.dmg.fantasystick.ability.WarBanner(warBannerInitial, sessions, parties, outgoingDamageBonus);
+            meteorSettings = new games.dmg.fantasystick.persistence.MeteorSettings(getDataFolder().toPath(), meteorConfiguration);
+            meteor = new games.dmg.fantasystick.ability.Meteor(meteorInitial, sessions, parties);
+            greatSword = new games.dmg.fantasystick.ability.GreatSword(greatSwordSettings);
+            revivals = new games.dmg.fantasystick.persistence.RevivalStore(getDataFolder().toPath());
+            revive = new games.dmg.fantasystick.ability.Revive(characters, revivals, Clock.systemUTC(), nextTick,
+                (size, title) -> getServer().createInventory(null, size, title),
+                problem -> getLogger().log(Level.WARNING, "Revive transition failed", problem));
+            abilityRegistry.register(fireball.definition());
+            abilityRegistry.register(frostShard.definition());
+            abilityRegistry.register(longbow.definition());
+            abilityRegistry.register(quickstep.definition());
+            abilityRegistry.register(secondWind.definition());
+            abilityRegistry.register(stoneSkin.definition());
+            abilityRegistry.register(shieldBash.definition());
+            abilityRegistry.register(hex.definition());
+            abilityRegistry.register(inspire.definition());
+            abilityRegistry.register(mendingLight.definition());
+            abilityRegistry.register(purify.definition());
+            abilityRegistry.register(guardianBond.definition());
+            abilityRegistry.register(rallyingCry.definition());
+            abilityRegistry.register(frostNova.definition());
+            abilityRegistry.register(chainLightning.definition());
+            abilityRegistry.register(sanctuary.definition());
+            abilityRegistry.register(warBanner.definition());
+            abilityRegistry.register(meteor.definition());
+            abilityRegistry.register(greatSword.definition());
+            abilityRegistry.register(revive.definition());
+            sessions.attachAbilityRegistry(abilityRegistry);
+            vitals = new games.dmg.fantasystick.session.SessionVitals();
+            sessions.attachVitals(vitals);
+            nutritionPolicy = new games.dmg.fantasystick.session.NutritionPolicy(sessions);
+            games.dmg.fantasystick.ability.AbilityScheduler abilityScheduler = (delay, action) -> {
+                long ticks = Math.max(1, (delay.toNanos() + 49_999_999L) / 50_000_000L);
+                var task = getServer().getScheduler().runTaskLater(this, action, ticks);
+                return task::cancel;
+            };
+            adminReviveSettings = new games.dmg.fantasystick.persistence.AdminReviveSettings(getDataFolder().toPath(), adminReviveTimeout);
+            adminRevival = new games.dmg.fantasystick.session.AdminRevival(characters, revivals, Clock.systemUTC(), nextTick,
+                abilityScheduler::later, (size, title) -> getServer().createInventory(null, size, title),
+                problem -> getLogger().log(Level.WARNING, "Admin revival failed", problem));
+            abilityEngine = new games.dmg.fantasystick.ability.AbilityEngine(abilityRegistry, characters, sessions, parties,
+                Clock.systemUTC(), nextTick, abilityScheduler, report -> { },
+                problem -> getLogger().log(Level.WARNING, "Ability engine failed for character " + problem.character()
+                    + "; ability " + problem.ability(), problem.cause()));
+            abilityEngine.install(this);
+            books = new games.dmg.fantasystick.book.CharacterBookController(characters, rules, sessions, nextTick,
                 problem -> getLogger().log(Level.WARNING, "Character book failed for player " + problem.player()
                     + "; character " + problem.character(), problem.cause()), parties, getServer(), id -> {
                     String name = localPresentation.get().name(id);
                     var player = getServer().getPlayer(id);
                     return net.kyori.adventure.text.Component.text(name != null ? name : player == null ? id.toString() : player.getName());
-                });
-            sessionEvents = new EquipmentSessionEvents(sessions, nextTick, diagnostics, books);
+                }, abilityRegistry, abilityEngine);
+            var localBasicAttack = new games.dmg.fantasystick.combat.BasicAttack(sessions);
+            basicAttack = localBasicAttack;
+            sessionEvents = new EquipmentSessionEvents(sessions, nextTick, diagnostics, input -> {
+                books.accept(input);
+                localBasicAttack.accept(input);
+                abilityEngine.accept(input);
+            });
+            sessionEvents.attachAbilityRegistry(abilityRegistry);
             admin = new EquipmentAdminCommand(receipts, sessions, getServer(), nextTick,
                 problem -> getLogger().log(Level.WARNING, "Equipment admin " + problem.operation()
-                    + " for player " + problem.player(), problem.cause()), adventureSettings);
+                    + " for player " + problem.player(), problem.cause()), adventureSettings,
+                frostShardSettings, frostShard, longbowSettings, longbow,
+                quickstepSettings, quickstep, secondWindSettings, secondWind,
+                stoneSkinSettings, stoneSkin, shieldBashSettings, shieldBash, hexSettings, hex,
+                inspireSettings, inspire, abilityRegistry);
+            admin.attachMendingLight(mendingLightSettings, mendingLight);
+            admin.attachPurify(purifySettings, purify);
+            admin.attachGuardianBond(guardianBondSettings, guardianBond);
+            admin.attachRallyingCry(rallyingCrySettings, rallyingCry);
+            admin.attachFrostNova(frostNovaSettings, frostNova);
+            admin.attachChainLightning(chainLightningSettings, chainLightning);
+            admin.attachSanctuary(sanctuarySettings, sanctuary);
+            admin.attachWarBanner(warBannerSettings, warBanner);
+            admin.attachMeteor(meteorSettings, meteor);
+            admin.attachAdminRevival(adminRevival, adminReviveSettings);
+            admin.attachExperienceGrant(new games.dmg.fantasystick.session.AdminExperienceGrant(
+                characters, rules, sessions, nextTick, getServer()::getPlayer,
+                problem -> getLogger().log(Level.WARNING,
+                    "Admin experience grant for character " + problem.character(), problem.cause())));
+            admin.attachSwitchDelay(switchDelaySettings);
+            admin.attachRoleplaySettings(roleplaySettings);
+            admin.attachPartySettings(partySettings);
+            admin.attachSheetResourcePack(sheetResourcePackSettings, sheetResourcePack);
+            admin.attachCharacterIssuer(new games.dmg.fantasystick.session.AdminCharacterIssuer(characters,
+                () -> factory.create(rules), nextTick, problem -> getLogger().log(Level.WARNING,
+                    "Admin character issue " + problem.operation() + " for player " + problem.player()
+                        + "; character " + problem.character(), problem.cause())));
             var command = java.util.Objects.requireNonNull(getCommand("fantasystick"), "Missing packaged fantasystick command");
             command.setExecutor(admin);
             command.setTabCompleter(admin);
@@ -138,14 +394,43 @@ public final class FantasyStickPlugin extends JavaPlugin {
             getServer().getPluginManager().registerEvents(partyEvents, this);
             getServer().getPluginManager().registerEvents(partyCombat, this);
             partyCombat.install(this);
+            getServer().getPluginManager().registerEvents(combatExperience, this);
+            combatExperience.install(this);
+            getServer().getPluginManager().registerEvents(fireball, this);
+            getServer().getPluginManager().registerEvents(frostShard, this);
+            getServer().getPluginManager().registerEvents(frostNova, this);
+            getServer().getPluginManager().registerEvents(chainLightning, this);
+            getServer().getPluginManager().registerEvents(meteor, this);
+            getServer().getPluginManager().registerEvents(longbow, this);
+            getServer().getPluginManager().registerEvents(quickstep, this);
+            getServer().getPluginManager().registerEvents(combatMitigation, this);
+            getServer().getPluginManager().registerEvents(guardianBond, this);
+            guardianBond.install(this);
+            getServer().getPluginManager().registerEvents(shieldBash, this);
+            getServer().getPluginManager().registerEvents(outgoingDamageMitigation, this);
+            getServer().getPluginManager().registerEvents(outgoingDamageBonus, this);
+            rallyingCry.install(this);
+            warBanner.install(this);
+            getServer().getPluginManager().registerEvents(temporaryHealth, this);
+            getServer().getPluginManager().registerEvents(greatSword, this);
+            getServer().getPluginManager().registerEvents(revive, this);
+            getServer().getPluginManager().registerEvents(adminRevival, this);
+            getServer().getPluginManager().registerEvents(localBasicAttack, this);
+            getServer().getPluginManager().registerEvents(nutritionPolicy, this);
             getServer().getPluginManager().registerEvents(books, this);
             getServer().getPluginManager().registerEvents(gameModes, this);
+            getServer().getPluginManager().registerEvents(sheetResourcePack, this);
             sessionVisuals = new games.dmg.fantasystick.session.SessionVisuals(sessions,
                 failure -> getLogger().log(Level.WARNING, "Fantasy session particle delivery failed", failure));
             sessionVisuals.install(this);
             recipeRegistered = getServer().addRecipe(new CharacterSheets().recipe());
             if (!recipeRegistered) throw new IllegalStateException("Character-sheet recipe key is already registered");
-            for (var player : getServer().getOnlinePlayers()) sessions.arrive(player);
+            recipeDiscovery = new RecipeDiscovery(CharacterSheets.RECIPE, getLogger());
+            getServer().getPluginManager().registerEvents(recipeDiscovery, this);
+            var onlinePlayers = List.copyOf(getServer().getOnlinePlayers());
+            recipeDiscovery.discoverAll(onlinePlayers);
+            for (var player : onlinePlayers) { sessions.arrive(player); revive.reconcile(player); }
+            sheetResourcePack.deliverAll(onlinePlayers);
         } catch (RuntimeException | LinkageError failure) {
             try { onDisable(); }
             catch (RuntimeException | LinkageError cleanupFailure) { failure.addSuppressed(cleanupFailure); }
@@ -168,6 +453,7 @@ public final class FantasyStickPlugin extends JavaPlugin {
         var closingCrafting = crafting; crafting = null;
         var closingGuard = guard; guard = null;
         var closingAnvil = anvilNames; anvilNames = null;
+        var closingRecipeDiscovery = recipeDiscovery; recipeDiscovery = null;
         var closingSessions = sessions; sessions = null;
         var closingReceipts = receipts; receipts = null;
         var closingCharacters = characters; characters = null;
@@ -175,15 +461,162 @@ public final class FantasyStickPlugin extends JavaPlugin {
         var closingModes = gameModes; gameModes = null;
         var closingVitals = vitals; vitals = null;
         var closingVisuals = sessionVisuals; sessionVisuals = null;
+        var closingBasicAttack = basicAttack; basicAttack = null;
+        var closingCombatExperience = combatExperience; combatExperience = null;
+        var closingAbilityEngine = abilityEngine; abilityEngine = null;
+        var closingFireball = fireball; fireball = null;
+        var closingFrostShard = frostShard; frostShard = null;
+        var closingFrostSettings = frostShardSettings; frostShardSettings = null;
+        var closingLongbow = longbow; longbow = null;
+        var closingLongbowSettings = longbowSettings; longbowSettings = null;
+        var closingQuickstep = quickstep; quickstep = null;
+        var closingQuickstepSettings = quickstepSettings; quickstepSettings = null;
+        secondWind = null;
+        var closingStoneSkin = stoneSkin; stoneSkin = null;
+        var closingShieldBash = shieldBash; shieldBash = null;
+        var closingHex = hex; hex = null;
+        var closingInspire = inspire; inspire = null;
+        var closingInspireSettings = inspireSettings; inspireSettings = null;
+        mendingLight = null;
+        var closingMendingLightSettings = mendingLightSettings; mendingLightSettings = null;
+        purify = null;
+        var closingPurifySettings = purifySettings; purifySettings = null;
+        var closingGuardianBond = guardianBond; guardianBond = null;
+        var closingGuardianBondSettings = guardianBondSettings; guardianBondSettings = null;
+        var closingRallyingCry = rallyingCry; rallyingCry = null;
+        var closingRallyingCrySettings = rallyingCrySettings; rallyingCrySettings = null;
+        var closingFrostNova = frostNova; frostNova = null;
+        var closingFrostNovaSettings = frostNovaSettings; frostNovaSettings = null;
+        var closingChainLightning = chainLightning; chainLightning = null;
+        var closingChainLightningSettings = chainLightningSettings; chainLightningSettings = null;
+        var closingSanctuary = sanctuary; sanctuary = null;
+        var closingSanctuarySettings = sanctuarySettings; sanctuarySettings = null;
+        var closingWarBanner = warBanner; warBanner = null;
+        var closingWarBannerSettings = warBannerSettings; warBannerSettings = null;
+        var closingMeteor = meteor; meteor = null;
+        var closingMeteorSettings = meteorSettings; meteorSettings = null;
+        var closingOutgoingDamageBonus = outgoingDamageBonus; outgoingDamageBonus = null;
+        var closingAdminRevival = adminRevival; adminRevival = null;
+        var closingAdminReviveSettings = adminReviveSettings; adminReviveSettings = null;
+        var closingSwitchDelaySettings = switchDelaySettings; switchDelaySettings = null;
+        var closingRoleplaySettings = roleplaySettings; roleplaySettings = null;
+        var closingPartySettings = partySettings; partySettings = null;
+        var closingSheetResourcePackSettings = sheetResourcePackSettings; sheetResourcePackSettings = null;
+        var closingSheetResourcePack = sheetResourcePack; sheetResourcePack = null;
+        var closingTemporaryHealth = temporaryHealth; temporaryHealth = null;
+        var closingHexSettings = hexSettings; hexSettings = null;
+        var closingOutgoingDamageMitigation = outgoingDamageMitigation; outgoingDamageMitigation = null;
+        var closingShieldBashSettings = shieldBashSettings; shieldBashSettings = null;
+        var closingCombatMitigation = combatMitigation; combatMitigation = null;
+        var closingStoneSkinSettings = stoneSkinSettings; stoneSkinSettings = null;
+        var closingSecondWindSettings = secondWindSettings; secondWindSettings = null;
+        var closingGreatSword = greatSword; greatSword = null;
+        var closingRevive = revive; revive = null;
+        var closingRevivals = revivals; revivals = null;
+        abilityRegistry = null;
+        var closingNutrition = nutritionPolicy; nutritionPolicy = null;
         // Retire client resources independently of successful ordinary-equipment restoration.
         if (closingPresentation != null) cleanup("presentation", closingPresentation::close);
         if (closingProtocol != null) cleanup("protocol presentation", closingProtocol::close);
         if (closingAdmin != null) cleanup("admin command", closingAdmin::close);
-        if (closingSettings != null) {
-            configurationDrain = closingSettings.drained();
-            cleanup("configuration", closingSettings::close);
-        }
+        if (closingSettings != null) cleanup("configuration", closingSettings::close);
+        if (closingFrostSettings != null) cleanup("Frost Shard configuration", closingFrostSettings::close);
+        if (closingLongbowSettings != null) cleanup("Longbow configuration", closingLongbowSettings::close);
+        if (closingQuickstepSettings != null) cleanup("Quickstep configuration", closingQuickstepSettings::close);
+        if (closingSecondWindSettings != null) cleanup("Second Wind configuration", closingSecondWindSettings::close);
+        if (closingStoneSkinSettings != null) cleanup("Stone Skin configuration", closingStoneSkinSettings::close);
+        if (closingShieldBashSettings != null) cleanup("Shield Bash configuration", closingShieldBashSettings::close);
+        if (closingHexSettings != null) cleanup("Hex configuration", closingHexSettings::close);
+        if (closingInspireSettings != null) cleanup("Inspire configuration", closingInspireSettings::close);
+        if (closingMendingLightSettings != null) cleanup("Mending Light configuration", closingMendingLightSettings::close);
+        if (closingPurifySettings != null) cleanup("Purify configuration", closingPurifySettings::close);
+        if (closingGuardianBond != null) cleanup("Guardian Bond", closingGuardianBond::close);
+        if (closingGuardianBondSettings != null) cleanup("Guardian Bond configuration", closingGuardianBondSettings::close);
+        if (closingRallyingCry != null) cleanup("Rallying Cry", closingRallyingCry::close);
+        if (closingRallyingCrySettings != null) cleanup("Rallying Cry configuration", closingRallyingCrySettings::close);
+        if (closingFrostNova != null) cleanup("Frost Nova", closingFrostNova::close);
+        if (closingFrostNovaSettings != null) cleanup("Frost Nova configuration", closingFrostNovaSettings::close);
+        if (closingChainLightning != null) cleanup("Chain Lightning", closingChainLightning::close);
+        if (closingChainLightningSettings != null) cleanup("Chain Lightning configuration", closingChainLightningSettings::close);
+        if (closingSanctuary != null) cleanup("Sanctuary", closingSanctuary::close);
+        if (closingSanctuarySettings != null) cleanup("Sanctuary configuration", closingSanctuarySettings::close);
+        if (closingWarBanner != null) cleanup("War Banner", closingWarBanner::close);
+        if (closingWarBannerSettings != null) cleanup("War Banner configuration", closingWarBannerSettings::close);
+        if (closingMeteor != null) cleanup("Meteor", closingMeteor::close);
+        if (closingMeteorSettings != null) cleanup("Meteor configuration", closingMeteorSettings::close);
+        if (closingOutgoingDamageBonus != null) cleanup("outgoing damage bonuses", closingOutgoingDamageBonus::close);
+        if (closingAdminReviveSettings != null) cleanup("admin revival configuration", closingAdminReviveSettings::close);
+        if (closingSwitchDelaySettings != null) cleanup("switch delay configuration", closingSwitchDelaySettings::close);
+        if (closingRoleplaySettings != null) cleanup("roleplay configuration", closingRoleplaySettings::close);
+        if (closingPartySettings != null) cleanup("party configuration", closingPartySettings::close);
+        if (closingSheetResourcePackSettings != null) cleanup("sheet resource-pack configuration", closingSheetResourcePackSettings::close);
+        if (closingSheetResourcePack != null) cleanup("sheet resource-pack", closingSheetResourcePack::close);
+        configurationDrain = java.util.concurrent.CompletableFuture.allOf(
+            closingSettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingSettings.drained().toCompletableFuture(),
+            closingFrostSettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingFrostSettings.drained().toCompletableFuture(),
+            closingLongbowSettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingLongbowSettings.drained().toCompletableFuture(),
+            closingQuickstepSettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingQuickstepSettings.drained().toCompletableFuture(),
+            closingSecondWindSettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingSecondWindSettings.drained().toCompletableFuture(),
+            closingStoneSkinSettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingStoneSkinSettings.drained().toCompletableFuture(),
+            closingShieldBashSettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingShieldBashSettings.drained().toCompletableFuture(),
+            closingHexSettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingHexSettings.drained().toCompletableFuture(),
+            closingInspireSettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingInspireSettings.drained().toCompletableFuture(),
+            closingMendingLightSettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingMendingLightSettings.drained().toCompletableFuture(),
+            closingPurifySettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingPurifySettings.drained().toCompletableFuture(),
+            closingGuardianBondSettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingGuardianBondSettings.drained().toCompletableFuture(),
+            closingRallyingCrySettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingRallyingCrySettings.drained().toCompletableFuture(),
+            closingFrostNovaSettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingFrostNovaSettings.drained().toCompletableFuture(),
+            closingChainLightningSettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingChainLightningSettings.drained().toCompletableFuture(),
+            closingSanctuarySettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingSanctuarySettings.drained().toCompletableFuture(),
+            closingWarBannerSettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingWarBannerSettings.drained().toCompletableFuture(),
+            closingMeteorSettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingMeteorSettings.drained().toCompletableFuture(),
+            closingAdminReviveSettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingAdminReviveSettings.drained().toCompletableFuture(),
+            closingSwitchDelaySettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingSwitchDelaySettings.drained().toCompletableFuture(),
+            closingRoleplaySettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingRoleplaySettings.drained().toCompletableFuture(),
+            closingPartySettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingPartySettings.drained().toCompletableFuture(),
+            closingSheetResourcePackSettings == null ? java.util.concurrent.CompletableFuture.completedFuture(null)
+                : closingSheetResourcePackSettings.drained().toCompletableFuture());
         if (closingBooks != null) cleanup("character book", closingBooks::close);
+        if (closingAdminRevival != null) cleanup("admin revival", closingAdminRevival::close);
+        if (closingBasicAttack != null) cleanup("basic attack", closingBasicAttack::close);
+        if (closingCombatExperience != null) cleanup("combat experience", closingCombatExperience::close);
+        if (closingFireball != null) cleanup("Fireball", closingFireball::close);
+        if (closingFrostShard != null) cleanup("Frost Shard", closingFrostShard::close);
+        if (closingLongbow != null) cleanup("Longbow", closingLongbow::close);
+        if (closingQuickstep != null) cleanup("Quickstep", closingQuickstep::close);
+        if (closingStoneSkin != null) cleanup("Stone Skin", closingStoneSkin::close);
+        if (closingShieldBash != null) cleanup("Shield Bash", closingShieldBash::close);
+        if (closingHex != null) cleanup("Hex", closingHex::close);
+        if (closingInspire != null) cleanup("Inspire", closingInspire::close);
+        if (closingTemporaryHealth != null) cleanup("temporary health", closingTemporaryHealth::close);
+        if (closingOutgoingDamageMitigation != null) cleanup("outgoing damage mitigation", closingOutgoingDamageMitigation::close);
+        if (closingCombatMitigation != null) cleanup("combat mitigation", closingCombatMitigation::close);
+        if (closingGreatSword != null) cleanup("Great Sword", closingGreatSword::close);
+        if (closingRevive != null) cleanup("Revive", closingRevive::close);
+        if (closingAbilityEngine != null) cleanup("ability engine", closingAbilityEngine::close);
+        if (closingNutrition != null) cleanup("nutrition policy", closingNutrition::close);
         if (closingVisuals != null) cleanup("session particles", closingVisuals::close);
         if (closingParties != null) cleanup("parties", closingParties::close);
         if (closingPartyCombat != null) cleanup("party combat", closingPartyCombat::close);
@@ -195,16 +628,32 @@ public final class FantasyStickPlugin extends JavaPlugin {
         unregister(closingChat);
         unregister(closingPartyEvents);
         unregister(closingPartyCombat);
+        unregister(closingCombatExperience);
+        unregister(closingFireball);
+        unregister(closingFrostShard);
+        unregister(closingLongbow);
+        unregister(closingQuickstep);
+        unregister(closingCombatMitigation);
+        unregister(closingShieldBash);
+        unregister(closingOutgoingDamageMitigation);
+        unregister(closingTemporaryHealth);
+        unregister(closingGreatSword);
+        unregister(closingRevive);
+        unregister(closingAdminRevival);
+        unregister(closingBasicAttack);
+        unregister(closingNutrition);
         unregister(closingBooks);
         unregister(closingEvents);
         unregister(closingCrafting);
         unregister(closingGuard);
         unregister(closingAnvil);
+        unregister(closingRecipeDiscovery);
         if (recipeRegistered) cleanup("character-sheet recipe", () -> {
             getServer().removeRecipe(CharacterSheets.RECIPE);
             recipeRegistered = false; // Retain ownership for a later retry if removal failed.
         });
         if (closingCharacters != null) cleanup("character storage", closingCharacters::close);
+        if (closingRevivals != null) cleanup("revival storage", closingRevivals::close);
         // Never await IO on the server thread or close receipts ahead of accepted preparations.
         if (closingReceipts != null) cleanup("equipment receipt drain", () -> {
             if (closingSessions == null) closingReceipts.close();
@@ -225,21 +674,218 @@ public final class FantasyStickPlugin extends JavaPlugin {
         }
     }
 
-    private java.time.Duration switchDelay() {
-        Object configured = getConfig().get("character-swap-cooldown-seconds", 900);
-        String value = String.valueOf(configured);
-        if (!value.matches("[0-9]+")) {
-            throw new IllegalArgumentException("character-swap-cooldown-seconds must be a nonnegative integer");
-        }
+    private ProgressionRules progressionRules() {
         try {
-            var delay = java.time.Duration.ofSeconds(new java.math.BigInteger(value).longValueExact());
-            var deadline = java.time.Instant.now().plus(delay);
-            if (deadline.atOffset(java.time.ZoneOffset.UTC).getYear() > 9999) {
-                throw new IllegalArgumentException("character-swap-cooldown-seconds exceeds the persisted UTC timestamp range");
-            }
-            return delay;
-        } catch (ArithmeticException | java.time.DateTimeException invalid) {
-            throw new IllegalArgumentException("character-swap-cooldown-seconds exceeds the supported duration range", invalid);
+            var starting = new java.math.BigInteger(getConfig().getString("starting-points", "40"));
+            var threshold = new java.math.BigInteger(getConfig().getString("xp-per-level", "100"));
+            var maximum = new java.math.BigInteger(getConfig().getString("maximum-level", "30")).intValueExact();
+            return new ProgressionRules(starting, threshold, maximum);
+        } catch (ArithmeticException invalid) {
+            throw new IllegalArgumentException("maximum-level exceeds the supported integer range", invalid);
+        }
+    }
+
+    private games.dmg.fantasystick.progression.CombatRewardRules combatRewardRules() {
+        try {
+            var passive = new java.math.BigInteger(getConfig().getString("passive-xp", "1"));
+            var ordinary = new java.math.BigInteger(getConfig().getString("ordinary-xp", "10"));
+            var boss = new java.math.BigInteger(getConfig().getString("boss-xp", "100"));
+            var spacing = new java.math.BigDecimal(getConfig().getString("restricted-kill-spacing-blocks", "3"));
+            return new games.dmg.fantasystick.progression.CombatRewardRules(passive, ordinary, boss, spacing);
+        } catch (NumberFormatException invalid) {
+            throw new IllegalArgumentException("Combat reward settings must be decimal numbers", invalid);
+        }
+    }
+
+    private games.dmg.fantasystick.ability.Fireball.Settings fireballSettings() {
+        try {
+            var base = new java.math.BigInteger(getConfig().getString("fireball-base-damage", "6"));
+            var cooldown = java.time.Duration.ofSeconds(new java.math.BigInteger(
+                getConfig().getString("fireball-cooldown-seconds", "4")).longValueExact());
+            double range = new java.math.BigDecimal(getConfig().getString("fireball-range-blocks", "32")).doubleValue();
+            var lifetime = java.time.Duration.ofSeconds(new java.math.BigInteger(
+                getConfig().getString("fireball-lifetime-seconds", "5")).longValueExact());
+            return new games.dmg.fantasystick.ability.Fireball.Settings(base, cooldown, range, lifetime);
+        } catch (ArithmeticException | NumberFormatException invalid) {
+            throw new IllegalArgumentException("Fireball settings must use supported nonnegative numeric values", invalid);
+        }
+    }
+
+    private java.util.Map<String, String> frostShardConfiguration() {
+        var values = new java.util.LinkedHashMap<String, String>();
+        for (String key : games.dmg.fantasystick.persistence.FrostShardSettings.keys()) {
+            values.put(key, getConfig().getString(key,
+                games.dmg.fantasystick.persistence.FrostShardSettings.defaultValue(key)));
+        }
+        games.dmg.fantasystick.persistence.FrostShardSettings.parse(values);
+        return java.util.Map.copyOf(values);
+    }
+
+    private java.util.Map<String, String> longbowConfiguration() {
+        var values = new java.util.LinkedHashMap<String, String>();
+        for (String key : games.dmg.fantasystick.persistence.LongbowSettings.keys()) {
+            values.put(key, getConfig().getString(key,
+                games.dmg.fantasystick.persistence.LongbowSettings.defaultValue(key)));
+        }
+        games.dmg.fantasystick.persistence.LongbowSettings.parse(values);
+        return java.util.Map.copyOf(values);
+    }
+
+    private java.util.Map<String, String> quickstepConfiguration() {
+        var values = new java.util.LinkedHashMap<String, String>();
+        for (String key : games.dmg.fantasystick.persistence.QuickstepSettings.keys()) {
+            values.put(key, getConfig().getString(key,
+                games.dmg.fantasystick.persistence.QuickstepSettings.defaultValue(key)));
+        }
+        games.dmg.fantasystick.persistence.QuickstepSettings.parse(values);
+        return java.util.Map.copyOf(values);
+    }
+
+    private java.util.Map<String, String> secondWindConfiguration() {
+        var values = new java.util.LinkedHashMap<String, String>();
+        for (String key : games.dmg.fantasystick.persistence.SecondWindSettings.keys()) {
+            values.put(key, getConfig().getString(key,
+                games.dmg.fantasystick.persistence.SecondWindSettings.defaultValue(key)));
+        }
+        games.dmg.fantasystick.persistence.SecondWindSettings.parse(values);
+        return java.util.Map.copyOf(values);
+    }
+
+    private java.util.Map<String, String> stoneSkinConfiguration() {
+        var values = new java.util.LinkedHashMap<String, String>();
+        for (String key : games.dmg.fantasystick.persistence.StoneSkinSettings.keys()) {
+            values.put(key, getConfig().getString(key,
+                games.dmg.fantasystick.persistence.StoneSkinSettings.defaultValue(key)));
+        }
+        games.dmg.fantasystick.persistence.StoneSkinSettings.parse(values);
+        return java.util.Map.copyOf(values);
+    }
+
+    private java.util.Map<String, String> shieldBashConfiguration() {
+        var values = new java.util.LinkedHashMap<String, String>();
+        for (String key : games.dmg.fantasystick.persistence.ShieldBashSettings.keys()) {
+            values.put(key, getConfig().getString(key,
+                games.dmg.fantasystick.persistence.ShieldBashSettings.defaultValue(key)));
+        }
+        games.dmg.fantasystick.persistence.ShieldBashSettings.parse(values);
+        return java.util.Map.copyOf(values);
+    }
+
+    private java.util.Map<String, String> hexConfiguration() {
+        var values = new java.util.LinkedHashMap<String, String>();
+        for (String key : games.dmg.fantasystick.persistence.HexSettings.keys()) {
+            values.put(key, getConfig().getString(key, games.dmg.fantasystick.persistence.HexSettings.defaultValue(key)));
+        }
+        games.dmg.fantasystick.persistence.HexSettings.parse(values);
+        return java.util.Map.copyOf(values);
+    }
+
+    private java.util.Map<String, String> inspireConfiguration() {
+        var values = new java.util.LinkedHashMap<String, String>();
+        for (String key : games.dmg.fantasystick.persistence.InspireSettings.keys()) {
+            values.put(key, getConfig().getString(key, games.dmg.fantasystick.persistence.InspireSettings.defaultValue(key)));
+        }
+        games.dmg.fantasystick.persistence.InspireSettings.parse(values);
+        return java.util.Map.copyOf(values);
+    }
+
+    private java.util.Map<String, String> mendingLightConfiguration() {
+        var values = new java.util.LinkedHashMap<String, String>();
+        for (String key : games.dmg.fantasystick.persistence.MendingLightSettings.keys()) {
+            values.put(key, getConfig().getString(key,
+                games.dmg.fantasystick.persistence.MendingLightSettings.defaultValue(key)));
+        }
+        games.dmg.fantasystick.persistence.MendingLightSettings.parse(values);
+        return java.util.Map.copyOf(values);
+    }
+
+    private java.util.Map<String, String> purifyConfiguration() {
+        var values = new java.util.LinkedHashMap<String, String>();
+        for (String key : games.dmg.fantasystick.persistence.PurifySettings.keys()) {
+            values.put(key, getConfig().getString(key, games.dmg.fantasystick.persistence.PurifySettings.defaultValue(key)));
+        }
+        games.dmg.fantasystick.persistence.PurifySettings.parse(values);
+        return java.util.Map.copyOf(values);
+    }
+
+    private java.util.Map<String, String> guardianBondConfiguration() {
+        var values = new java.util.LinkedHashMap<String, String>();
+        for (String key : games.dmg.fantasystick.persistence.GuardianBondSettings.keys()) {
+            values.put(key, getConfig().getString(key,
+                games.dmg.fantasystick.persistence.GuardianBondSettings.defaultValue(key)));
+        }
+        games.dmg.fantasystick.persistence.GuardianBondSettings.parse(values);
+        return java.util.Map.copyOf(values);
+    }
+
+    private java.util.Map<String, String> rallyingCryConfiguration() {
+        var values = new java.util.LinkedHashMap<String, String>();
+        for (String key : games.dmg.fantasystick.persistence.RallyingCrySettings.keys()) {
+            values.put(key, getConfig().getString(key,
+                games.dmg.fantasystick.persistence.RallyingCrySettings.defaultValue(key)));
+        }
+        games.dmg.fantasystick.persistence.RallyingCrySettings.parse(values);
+        return java.util.Map.copyOf(values);
+    }
+
+    private java.util.Map<String, String> frostNovaConfiguration() {
+        var values = new java.util.LinkedHashMap<String, String>();
+        for (String key : games.dmg.fantasystick.persistence.FrostNovaSettings.keys()) {
+            values.put(key, getConfig().getString(key,
+                games.dmg.fantasystick.persistence.FrostNovaSettings.defaultValue(key)));
+        }
+        games.dmg.fantasystick.persistence.FrostNovaSettings.parse(values);
+        return java.util.Map.copyOf(values);
+    }
+
+    private java.util.Map<String, String> chainLightningConfiguration() {
+        var values = new java.util.LinkedHashMap<String, String>();
+        for (String key : games.dmg.fantasystick.persistence.ChainLightningSettings.keys()) {
+            values.put(key, getConfig().getString(key,
+                games.dmg.fantasystick.persistence.ChainLightningSettings.defaultValue(key)));
+        }
+        games.dmg.fantasystick.persistence.ChainLightningSettings.parse(values);
+        return java.util.Map.copyOf(values);
+    }
+
+    private java.util.Map<String, String> sanctuaryConfiguration() {
+        var values = new java.util.LinkedHashMap<String, String>();
+        for (String key : games.dmg.fantasystick.persistence.SanctuarySettings.keys()) {
+            values.put(key, getConfig().getString(key,
+                games.dmg.fantasystick.persistence.SanctuarySettings.defaultValue(key)));
+        }
+        games.dmg.fantasystick.persistence.SanctuarySettings.parse(values);
+        return java.util.Map.copyOf(values);
+    }
+
+    private java.util.Map<String, String> warBannerConfiguration() {
+        var values = new java.util.LinkedHashMap<String, String>();
+        for (String key : games.dmg.fantasystick.persistence.WarBannerSettings.keys()) {
+            values.put(key, getConfig().getString(key,
+                games.dmg.fantasystick.persistence.WarBannerSettings.defaultValue(key)));
+        }
+        games.dmg.fantasystick.persistence.WarBannerSettings.parse(values);
+        return java.util.Map.copyOf(values);
+    }
+
+    private java.util.Map<String, String> meteorConfiguration() {
+        var values = new java.util.LinkedHashMap<String, String>();
+        for (String key : games.dmg.fantasystick.persistence.MeteorSettings.keys()) {
+            values.put(key, getConfig().getString(key,
+                games.dmg.fantasystick.persistence.MeteorSettings.defaultValue(key)));
+        }
+        games.dmg.fantasystick.persistence.MeteorSettings.parse(values);
+        return java.util.Map.copyOf(values);
+    }
+
+    private games.dmg.fantasystick.ability.GreatSword.Settings greatSwordSettings() {
+        try {
+            var base = new java.math.BigInteger(getConfig().getString("great-sword-base-damage", "7"));
+            var seconds = new java.math.BigDecimal(getConfig().getString("great-sword-recovery-seconds", "1.2"));
+            var recovery = java.time.Duration.ofNanos(seconds.movePointRight(9).toBigIntegerExact().longValueExact());
+            return new games.dmg.fantasystick.ability.GreatSword.Settings(base, recovery);
+        } catch (ArithmeticException | NumberFormatException invalid) {
+            throw new IllegalArgumentException("Great Sword settings must use supported nonnegative numeric values", invalid);
         }
     }
 

src/main/java/games/dmg/fantasystick/ability/AbilityDefinition.java

@@ -0,0 +1,40 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.regex.Pattern;
+import org.bukkit.Material;
+
+/** Immutable internal ability metadata and focused effect boundary; not an external add-on API. */
+public record AbilityDefinition(String id, String name, Material icon, List<String> lore, String instructions,
+        Map<Stat, BigInteger> requirements, BigInteger pointCost, Activation activation,
+        ControlInput.Gesture gesture, Duration cooldown, Map<String, BigDecimal> parameters,
+        TargetPolicy targetPolicy, AbilityEffect effect) {
+    public enum Activation { IMMEDIATE, DELAYED, PROJECTILE, AREA, SELECTION }
+    public enum TargetPolicy { SELF, HOSTILE, PROJECTILE_HOSTILE, ALLY, PARTY, AREA, SELECTION, EXCEPTIONAL_NONCOMBAT,
+        EXCEPTIONAL_NONCOMBAT_SELECTION }
+    private static final Pattern ID = Pattern.compile("[a-z][a-z0-9_]{0,63}");
+    private static final Pattern PARAMETER = Pattern.compile("[a-z][a-z0-9_-]{0,63}");
+
+    public AbilityDefinition {
+        Objects.requireNonNull(id); Objects.requireNonNull(name); Objects.requireNonNull(icon);
+        Objects.requireNonNull(lore); Objects.requireNonNull(instructions); Objects.requireNonNull(requirements);
+        Objects.requireNonNull(pointCost); Objects.requireNonNull(activation); Objects.requireNonNull(gesture);
+        Objects.requireNonNull(cooldown); Objects.requireNonNull(parameters); Objects.requireNonNull(targetPolicy);
+        Objects.requireNonNull(effect);
+        lore = List.copyOf(lore); requirements = Map.copyOf(requirements); parameters = Map.copyOf(parameters);
+        if (!ID.matcher(id).matches() || name.isBlank() || icon.isAir() || lore.isEmpty()
+                || lore.stream().anyMatch(String::isBlank) || instructions.isBlank() || pointCost.signum() <= 0
+                || cooldown.isNegative() || cooldown.compareTo(Duration.ofDays(365)) > 0 || requirements.values().stream().anyMatch(value -> value.compareTo(BigInteger.TEN) < 0)
+                || parameters.entrySet().stream().anyMatch(entry -> !PARAMETER.matcher(entry.getKey()).matches()
+                    || entry.getValue().signum() < 0 || !Double.isFinite(entry.getValue().doubleValue()))) {
+            throw new IllegalArgumentException("Invalid ability definition");
+        }
+    }
+}

src/main/java/games/dmg/fantasystick/ability/AbilityEffect.java

@@ -0,0 +1,9 @@
+package games.dmg.fantasystick.ability;
+
+/** Focused native effect invoked only after shared persistence, cooldown and target authorization. */
+@FunctionalInterface
+public interface AbilityEffect {
+    /** Effect-specific initial eligibility checked before the shared cooldown commit. */
+    default boolean accepts(games.dmg.fantasystick.session.ControlInput input) { return true; }
+    void activate(AbilityExecution execution);
+}

src/main/java/games/dmg/fantasystick/ability/AbilityEngine.java

@@ -0,0 +1,354 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.party.PartyRoster;
+import games.dmg.fantasystick.persistence.CharacterRecord;
+import games.dmg.fantasystick.persistence.CharacterStorage;
+import games.dmg.fantasystick.session.ControlInput;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import java.math.BigInteger;
+import java.time.Clock;
+import java.time.DateTimeException;
+import java.time.Duration;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.function.Consumer;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Player;
+
+/** Shared character mutation, cooldown, target, execution, report and cleanup boundary. */
+public final class AbilityEngine implements Consumer<ControlInput>, AutoCloseable {
+    public record Failure(UUID character, String ability, Throwable cause) { }
+    public record Mutation(CharacterStorage.AbilityMutationStatus status, CharacterRecord record) { }
+    private record Key(UUID character, String ability) { }
+
+    private final AbilityRegistry registry;
+    private final CharacterStorage characters;
+    private final EquipmentSessions sessions;
+    private final PartyRoster parties;
+    private final Clock clock;
+    private final Consumer<Runnable> nextTick;
+    private final AbilityScheduler scheduler;
+    private final Consumer<AbilityReport> reports;
+    private final Consumer<Failure> failures;
+    private final Map<Key, Object> pending = new HashMap<>();
+    private final Map<Key, Long> generations = new HashMap<>();
+    private final Map<Key, Set<Runtime>> active = new HashMap<>();
+    private org.bukkit.scheduler.BukkitTask sweepTask;
+    private boolean closed;
+
+    public AbilityEngine(AbilityRegistry registry, CharacterStorage characters, EquipmentSessions sessions,
+            PartyRoster parties, Clock clock, Consumer<Runnable> nextTick, AbilityScheduler scheduler,
+            Consumer<AbilityReport> reports, Consumer<Failure> failures) {
+        this.registry = Objects.requireNonNull(registry); this.characters = Objects.requireNonNull(characters);
+        this.sessions = Objects.requireNonNull(sessions); this.parties = Objects.requireNonNull(parties);
+        this.clock = Objects.requireNonNull(clock); this.nextTick = Objects.requireNonNull(nextTick);
+        this.scheduler = Objects.requireNonNull(scheduler); this.reports = Objects.requireNonNull(reports);
+        this.failures = Objects.requireNonNull(failures);
+    }
+
+    public void install(org.bukkit.plugin.Plugin plugin) {
+        if (closed || sweepTask != null) throw new IllegalStateException("Ability engine is already installed or closed");
+        sweepTask = plugin.getServer().getScheduler().runTaskTimer(plugin, this::sweep, 1, 1);
+    }
+
+    public CompletableFuture<Mutation> purchase(ControlInput input, String ability, BigInteger expectedRevision) {
+        Objects.requireNonNull(input); Objects.requireNonNull(expectedRevision);
+        var definition = registry.find(ability).orElse(null);
+        if (closed || definition == null || input.kind() != ControlInput.Kind.BOOK || !input.stillCurrent()) {
+            return CompletableFuture.completedFuture(new Mutation(CharacterStorage.AbilityMutationStatus.UNAVAILABLE, null));
+        }
+        return mutation(input, ability, expectedRevision,
+            () -> characters.unlockAbility(input.session().character(), expectedRevision, ability,
+                definition.requirements(), definition.pointCost()));
+    }
+
+    public CompletableFuture<Mutation> assign(ControlInput input, String ability, int slot, BigInteger expectedRevision) {
+        Objects.requireNonNull(input); Objects.requireNonNull(expectedRevision);
+        if (closed || registry.find(ability).isEmpty() || input.kind() != ControlInput.Kind.BOOK || !input.stillCurrent()) {
+            return CompletableFuture.completedFuture(new Mutation(CharacterStorage.AbilityMutationStatus.UNAVAILABLE, null));
+        }
+        return mutation(input, ability, expectedRevision,
+            () -> characters.assignAbility(input.session().character(), expectedRevision, ability, slot));
+    }
+
+    public CompletableFuture<Mutation> unlearn(ControlInput input, String ability, BigInteger expectedRevision) {
+        Objects.requireNonNull(input); Objects.requireNonNull(expectedRevision);
+        if (closed || registry.find(ability).isEmpty() || input.kind() != ControlInput.Kind.BOOK || !input.stillCurrent()) {
+            return CompletableFuture.completedFuture(new Mutation(CharacterStorage.AbilityMutationStatus.UNAVAILABLE, null));
+        }
+        return mutation(input, ability, expectedRevision,
+            () -> characters.unlearnAbility(input.session().character(), expectedRevision, ability))
+            .thenApply(mutation -> {
+                if (mutation.record() != null && !mutation.record().learned().contains(ability)) {
+                    remove(input.session().character(), ability);
+                }
+                return mutation;
+            });
+    }
+
+    private CompletableFuture<Mutation> mutation(ControlInput input, String ability, BigInteger expectedRevision,
+            java.util.function.Supplier<CompletableFuture<CharacterStorage.AbilityMutation>> operation) {
+        var result = new CompletableFuture<Mutation>();
+        CompletableFuture<CharacterStorage.AbilityMutation> work;
+        try { work = operation.get(); }
+        catch (RuntimeException failure) { report(input.session().character(), ability, failure); result.completeExceptionally(failure); return result; }
+        work.whenComplete((mutation, failure) -> schedule(input.session().character(), ability, result, () -> {
+            if (failure != null) { report(input.session().character(), ability, failure); result.completeExceptionally(failure); return; }
+            var record = mutation.record().orElse(null);
+            if (mutation.status() == CharacterStorage.AbilityMutationStatus.APPLIED) {
+                try {
+                    if (record == null || !input.stillCurrent()
+                            || !sessions.acknowledgeProgress(input.session(), expectedRevision, record)) {
+                        result.complete(new Mutation(CharacterStorage.AbilityMutationStatus.STALE, record)); return;
+                    }
+                } catch (RuntimeException nativeFailure) {
+                    report(input.session().character(), ability, nativeFailure);
+                    result.completeExceptionally(nativeFailure); return;
+                }
+            }
+            result.complete(new Mutation(mutation.status(), record));
+        }));
+        return result;
+    }
+
+    @Override public void accept(ControlInput input) {
+        if (closed || input.kind() != ControlInput.Kind.ABILITY || !input.stillCurrent()) return;
+        var definition = registry.find(input.ability()).orElse(null);
+        if (definition == null || definition.gesture() != input.gesture()) {
+            input.player().sendMessage("That ability is unavailable."); return;
+        }
+        var record = sessions.currentRecord(input.session()).orElse(null);
+        if (record == null || !record.learned().contains(definition.id())
+                || input.slot() < 2 || !record.loadout().get(input.slot() - 2).equals(definition.id())) {
+            input.player().sendMessage("That ability is not learned and assigned to this control."); return;
+        }
+        Instant now = clock.instant();
+        Instant existing = record.cooldowns().get(definition.id());
+        if (existing != null && now.isBefore(existing)) {
+            input.player().sendMessage("" + definition.name() + " is ready in "
+                + Math.max(1, Duration.between(now, existing).toSeconds()) + " seconds."); return;
+        }
+        boolean accepted;
+        try { accepted = eligible(definition.targetPolicy(), input, input.target()) && definition.effect().accepts(input); }
+        catch (RuntimeException invalid) {
+            report(input.session().character(), definition.id(), invalid);
+            input.player().sendMessage("That target could not be validated for " + definition.name() + "."); return;
+        }
+        if (!accepted) {
+            input.player().sendMessage("That target is not eligible for " + definition.name() + "."); return;
+        }
+        var key = new Key(input.session().character(), definition.id());
+        Object token = new Object();
+        if (pending.putIfAbsent(key, token) != null) { input.player().sendMessage("That cast is still being saved."); return; }
+        long generation = generations.getOrDefault(key, 0L);
+        Instant readyAt;
+        try { readyAt = now.plus(definition.cooldown()); }
+        catch (DateTimeException | ArithmeticException invalid) {
+            pending.remove(key, token); report(key.character(), key.ability(), invalid);
+            input.player().sendMessage("That ability's cooldown is invalid."); return;
+        }
+        characters.commitAbilityCooldown(key.character(), record.revision(), key.ability(), readyAt)
+            .whenComplete((mutation, failure) -> {
+                try {
+                    nextTick.accept(() -> completeCast(input, definition, record.revision(), readyAt,
+                        key, token, generation, mutation, failure));
+                } catch (RuntimeException rejected) {
+                    pending.remove(key, token); report(key.character(), key.ability(), rejected);
+                }
+            });
+    }
+
+    private void completeCast(ControlInput input, AbilityDefinition definition, BigInteger expectedRevision, Instant readyAt,
+            Key key, Object token, long generation, CharacterStorage.AbilityMutation mutation, Throwable failure) {
+        if (!pending.remove(key, token)) return;
+        if (closed) return;
+        if (failure != null) {
+            report(key.character(), key.ability(), failure);
+            input.player().sendMessage("The cast could not be saved; no effect was applied."); return;
+        }
+        boolean unchangedDeadline = mutation.status() == CharacterStorage.AbilityMutationStatus.UNCHANGED
+            && mutation.record().map(record -> readyAt.equals(record.cooldowns().get(key.ability()))).orElse(false);
+        if ((mutation.status() != CharacterStorage.AbilityMutationStatus.APPLIED && !unchangedDeadline)
+                || mutation.record().isEmpty()) {
+            input.player().sendMessage(switch (mutation.status()) {
+                case COOLDOWN -> "That ability is still on cooldown.";
+                case STALE -> "That character changed; retry the cast.";
+                case NOT_LEARNED, UNAVAILABLE -> "That ability is no longer available to this character.";
+                default -> "The cast was refused without applying an effect.";
+            });
+            return;
+        }
+        CharacterRecord saved = mutation.record().orElseThrow();
+        boolean synchronizedProgress = unchangedDeadline
+            ? sessions.currentRecord(input.session()).filter(saved::equals).isPresent()
+            : sessions.acknowledgeProgress(input.session(), expectedRevision, saved);
+        if (!synchronizedProgress) {
+            input.player().sendMessage("The cooldown was saved, but the session changed; no effect was applied."); return;
+        }
+        if (!input.stillCurrent() || generations.getOrDefault(key, 0L) != generation
+                || !eligible(definition.targetPolicy(), input, input.target())) {
+            input.player().sendMessage("The cooldown was saved, but eligibility changed; no effect was applied."); return;
+        }
+        var runtime = new Runtime(key, input, definition, generation);
+        active.computeIfAbsent(key, ignored -> new HashSet<>()).add(runtime);
+        try {
+            definition.effect().activate(runtime);
+            if (definition.activation() == AbilityDefinition.Activation.IMMEDIATE) runtime.finish();
+        } catch (RuntimeException effectFailure) {
+            runtime.close(); report(key.character(), key.ability(), effectFailure);
+            input.player().sendMessage("The cooldown was saved, but the ability effect failed safely.");
+        }
+    }
+
+    /** Future refund/removal paths invalidate pending callbacks and close only this ability's owned work. */
+    public void remove(UUID character, String ability) {
+        var key = new Key(Objects.requireNonNull(character), Objects.requireNonNull(ability));
+        generations.put(key, generations.getOrDefault(key, 0L) + 1);
+        pending.remove(key);
+        for (var runtime : List.copyOf(active.getOrDefault(key, Set.of()))) runtime.close();
+    }
+
+    /** Bounded lifecycle sweep; plugin timers may call this without scanning future catalogues. */
+    public void sweep() {
+        if (closed) return;
+        sessions.refreshCooldownControls(64);
+        int checked = 0;
+        outer: for (var runtimes : List.copyOf(active.values())) {
+            for (var runtime : List.copyOf(runtimes)) {
+                if (!runtime.stillCurrent()) runtime.close();
+                if (++checked == 64) break outer;
+            }
+        }
+    }
+
+    private boolean eligible(AbilityDefinition.TargetPolicy policy, ControlInput input, Entity target) {
+        return switch (policy) {
+            case SELF -> target == null || target == input.player();
+            case HOSTILE -> hostile(input, target);
+            case PROJECTILE_HOSTILE -> target == null || hostile(input, target);
+            case ALLY -> target instanceof Player player && fantasy(player);
+            case PARTY -> target instanceof Player player
+                && (player == input.player() || fantasy(player) && sameParty(input.player(), player));
+            case AREA -> target == null || target instanceof LivingEntity && (!(target instanceof Player player) || fantasy(player));
+            case SELECTION -> target == null || target instanceof LivingEntity && (!(target instanceof Player player) || fantasy(player));
+            case EXCEPTIONAL_NONCOMBAT -> target instanceof Player && target != input.player();
+            case EXCEPTIONAL_NONCOMBAT_SELECTION -> target == null || target instanceof Player && target != input.player();
+        };
+    }
+
+    private boolean hostile(ControlInput input, Entity target) {
+        return target instanceof LivingEntity && target != input.player()
+            && (!(target instanceof Player player) || fantasy(player) && !sameParty(input.player(), player));
+    }
+
+    private boolean fantasy(Player player) { return sessions.active(player.getUniqueId()).filter(sessions::current).isPresent(); }
+    private boolean sameParty(Player source, Player target) {
+        return parties.partyOf(source.getUniqueId()).filter(party -> party.members().contains(target.getUniqueId())).isPresent();
+    }
+
+    private <T> void schedule(UUID character, String ability, CompletableFuture<T> result, Runnable action) {
+        try { nextTick.accept(action); }
+        catch (RuntimeException rejected) {
+            report(character, ability, rejected);
+            if (result != null) result.completeExceptionally(rejected);
+        }
+    }
+
+    private void report(UUID character, String ability, Throwable failure) {
+        try { failures.accept(new Failure(character, ability, failure)); }
+        catch (RuntimeException ignored) { /* Diagnostics never authorize or replay an effect. */ }
+    }
+
+    private final class Runtime implements AbilityExecution {
+        private final Key key;
+        private final ControlInput input;
+        private final AbilityDefinition definition;
+        private final long generation;
+        private final Set<AutoCloseable> owned = new HashSet<>();
+        private boolean finished;
+        private int scheduled;
+
+        Runtime(Key key, ControlInput input, AbilityDefinition definition, long generation) {
+            this.key = key; this.input = input; this.definition = definition; this.generation = generation;
+        }
+        @Override public AbilityDefinition definition() { return definition; }
+        @Override public ControlInput input() { return input; }
+        @Override public CharacterRecord character() {
+            return sessions.currentRecord(input.session()).orElseThrow(() -> new IllegalStateException("Ability session ended"));
+        }
+        @Override public boolean stillCurrent() {
+            return !closed && !finished && input.stillCurrent() && sessions.current(input.session())
+                && generations.getOrDefault(key, 0L) == generation
+                && sessions.currentRecord(input.session()).filter(record -> record.learned().contains(key.ability())).isPresent();
+        }
+        @Override public List<Entity> eligible(Collection<? extends Entity> candidates, int maximum) {
+            Objects.requireNonNull(candidates);
+            if (maximum < 1 || maximum > 64) throw new IllegalArgumentException("Recipient bound must be 1..64");
+            var result = new ArrayList<Entity>(); int inspected = 0;
+            for (var candidate : candidates) {
+                if (++inspected > 256 || result.size() == maximum) break;
+                if (stillCurrent() && AbilityEngine.this.eligible(definition.targetPolicy(), input, candidate)) result.add(candidate);
+            }
+            return List.copyOf(result);
+        }
+        @Override public AbilityScheduler.Task later(Duration delay, Runnable action) {
+            Objects.requireNonNull(delay); Objects.requireNonNull(action);
+            if (delay.isNegative() || delay.compareTo(Duration.ofDays(365)) > 0 || ++scheduled > 64) {
+                throw new IllegalArgumentException("Delayed effect is outside the bounded execution contract");
+            }
+            var task = scheduler.later(delay, () -> {
+                if (!stillCurrent() || !AbilityEngine.this.eligible(definition.targetPolicy(), input, input.target())) {
+                    close(); return;
+                }
+                try { action.run(); }
+                catch (RuntimeException failure) {
+                    close(); AbilityEngine.this.report(key.character(), key.ability(), failure);
+                }
+            });
+            own(task); return task;
+        }
+        @Override public void own(AutoCloseable resource) {
+            Objects.requireNonNull(resource);
+            if (finished || owned.size() >= 64) {
+                try { resource.close(); } catch (Exception ignored) { }
+                if (!finished) throw new IllegalStateException("Ability owns too many resources");
+                return;
+            }
+            owned.add(resource);
+        }
+        @Override public void report(AbilityReport.Type type, Entity target, java.math.BigDecimal amount) {
+            if (!stillCurrent() || definition.targetPolicy() == AbilityDefinition.TargetPolicy.EXCEPTIONAL_NONCOMBAT
+                    || definition.targetPolicy() == AbilityDefinition.TargetPolicy.EXCEPTIONAL_NONCOMBAT_SELECTION
+                    || target == null || !AbilityEngine.this.eligible(definition.targetPolicy(), input, target)) return;
+            reports.accept(new AbilityReport(type, key.character(), input.session().session(), target.getUniqueId(), amount, clock.instant()));
+        }
+        @Override public void finish() { close(); }
+        @Override public void close() {
+            if (finished) return;
+            finished = true;
+            var resources = List.copyOf(owned); owned.clear();
+            for (var resource : resources) try { resource.close(); } catch (Exception failure) { AbilityEngine.this.report(key.character(), key.ability(), failure); }
+            var runtimes = active.get(key);
+            if (runtimes != null) { runtimes.remove(this); if (runtimes.isEmpty()) active.remove(key); }
+        }
+    }
+
+    @Override public void close() {
+        if (closed) return;
+        closed = true;
+        if (sweepTask != null) sweepTask.cancel();
+        pending.clear();
+        for (var runtimes : List.copyOf(active.values())) for (var runtime : List.copyOf(runtimes)) runtime.close();
+        active.clear(); generations.clear();
+    }
+}

src/main/java/games/dmg/fantasystick/ability/AbilityExecution.java

@@ -0,0 +1,22 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.session.ControlInput;
+import java.math.BigDecimal;
+import java.time.Duration;
+import java.util.Collection;
+import java.util.List;
+import org.bukkit.entity.Entity;
+
+/** Bounded owned runtime supplied by the shared engine after durable cast authorization. */
+public interface AbilityExecution extends AutoCloseable {
+    AbilityDefinition definition();
+    ControlInput input();
+    games.dmg.fantasystick.persistence.CharacterRecord character();
+    boolean stillCurrent();
+    List<Entity> eligible(Collection<? extends Entity> candidates, int maximum);
+    AbilityScheduler.Task later(Duration delay, Runnable action);
+    void own(AutoCloseable resource);
+    void report(AbilityReport.Type type, Entity target, BigDecimal amount);
+    void finish();
+    @Override void close();
+}

src/main/java/games/dmg/fantasystick/ability/AbilityRegistry.java

@@ -0,0 +1,36 @@
+package games.dmg.fantasystick.ability;
+
+import java.util.Comparator;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
+
+/** Process-local validated definitions; saved unknown IDs remain character data, not executable definitions. */
+public final class AbilityRegistry {
+    private final ConcurrentHashMap<String, AbilityDefinition> definitions = new ConcurrentHashMap<>();
+
+    public void register(AbilityDefinition definition) {
+        Objects.requireNonNull(definition);
+        if (definitions.putIfAbsent(definition.id(), definition) != null) {
+            throw new IllegalArgumentException("Duplicate ability ID: " + definition.id());
+        }
+    }
+
+    /** Replace one registered definition after an acknowledged runtime configuration save. */
+    public void replace(AbilityDefinition definition) {
+        Objects.requireNonNull(definition);
+        definitions.compute(definition.id(), (id, existing) -> {
+            if (existing == null) throw new IllegalArgumentException("Unknown ability ID: " + id);
+            return definition;
+        });
+    }
+
+    public Optional<AbilityDefinition> find(String id) {
+        return id == null ? Optional.empty() : Optional.ofNullable(definitions.get(id));
+    }
+
+    public List<AbilityDefinition> definitions() {
+        return definitions.values().stream().sorted(Comparator.comparing(AbilityDefinition::id)).toList();
+    }
+}

src/main/java/games/dmg/fantasystick/ability/AbilityReport.java

@@ -0,0 +1,19 @@
+package games.dmg.fantasystick.ability;
+
+import java.math.BigDecimal;
+import java.time.Instant;
+import java.util.Objects;
+import java.util.UUID;
+
+/** Evidence of an actual accepted effect; consumers decide rewards separately. */
+public record AbilityReport(Type type, UUID sourceCharacter, UUID sourceSession, UUID target,
+                            BigDecimal amount, Instant occurredAt) {
+    public enum Type { DAMAGE, HEALING, CLEANSING, PREVENTION, BOOST_USED }
+    public AbilityReport {
+        Objects.requireNonNull(type); Objects.requireNonNull(sourceCharacter); Objects.requireNonNull(sourceSession);
+        Objects.requireNonNull(target); Objects.requireNonNull(amount); Objects.requireNonNull(occurredAt);
+        if (amount.signum() <= 0 || !Double.isFinite(amount.doubleValue())) {
+            throw new IllegalArgumentException("An effective report requires a positive finite amount");
+        }
+    }
+}

src/main/java/games/dmg/fantasystick/ability/AbilityScheduler.java

@@ -0,0 +1,13 @@
+package games.dmg.fantasystick.ability;
+
+import java.time.Duration;
+
+/** Server-thread delayed-work boundary; returned tasks cancel only their owned callback. */
+@FunctionalInterface
+public interface AbilityScheduler {
+    Task later(Duration delay, Runnable action);
+
+    interface Task extends AutoCloseable {
+        @Override void close();
+    }
+}

src/main/java/games/dmg/fantasystick/ability/ChainLightning.java

@@ -0,0 +1,203 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.party.PartyRoster;
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.UUID;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.Particle;
+import org.bukkit.Sound;
+import org.bukkit.damage.DamageSource;
+import org.bukkit.damage.DamageType;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDamageEvent;
+
+/** Deterministic bounded four-target lightning chain with exact decimal decay. */
+public final class ChainLightning implements AbilityEffect, Listener, AutoCloseable {
+    public record Settings(BigInteger baseDamage, Duration cooldown, double initialRange, double jumpRange,
+                           int additionalTargets, BigDecimal jumpMultiplier) {
+        public Settings {
+            Objects.requireNonNull(baseDamage); Objects.requireNonNull(cooldown); Objects.requireNonNull(jumpMultiplier);
+            if (baseDamage.signum() < 0 || cooldown.isNegative() || cooldown.compareTo(Duration.ofDays(365)) > 0
+                    || !Double.isFinite(initialRange) || initialRange <= 0 || initialRange > 64
+                    || !Double.isFinite(jumpRange) || jumpRange <= 0 || jumpRange > 64
+                    || additionalTargets < 0 || additionalTargets > 63
+                    || jumpMultiplier.signum() <= 0 || jumpMultiplier.compareTo(BigDecimal.ONE) > 0) {
+                throw new IllegalArgumentException("Invalid Chain Lightning settings");
+            }
+        }
+        public static Settings defaults() {
+            return new Settings(BigInteger.valueOf(8), Duration.ofSeconds(18), 16, 6, 3, new BigDecimal("0.75"));
+        }
+    }
+    private static final class Attempt {
+        final AbilityExecution execution; final LivingEntity target; boolean accepted;
+        Attempt(AbilityExecution execution, LivingEntity target) { this.execution = execution; this.target = target; }
+    }
+
+    private volatile Settings settings;
+    private final EquipmentSessions sessions;
+    private final PartyRoster parties;
+    private Attempt damaging;
+    private boolean closed;
+
+    public ChainLightning(Settings settings, EquipmentSessions sessions, PartyRoster parties) {
+        this.settings = Objects.requireNonNull(settings); this.sessions = Objects.requireNonNull(sessions);
+        this.parties = Objects.requireNonNull(parties);
+    }
+    public void configure(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+
+    public AbilityDefinition definition() {
+        var current = settings;
+        return new AbilityDefinition("chain_lightning", "Chain Lightning", Material.LIGHTNING_ROD,
+            List.of("Strike for " + current.baseDamage() + " + INT modifier damage, then jump up to "
+                    + current.additionalTargets() + " times.",
+                "Each jump deals " + decimal(current.jumpMultiplier().movePointRight(2))
+                    + "% of the previous defined damage within " + decimal(BigDecimal.valueOf(current.jumpRange())) + " blocks."),
+            "Use while aiming at the first visible hostile within " + decimal(BigDecimal.valueOf(current.initialRange())) + " blocks.",
+            Map.of(Stat.INT, BigInteger.valueOf(20), Stat.DEX, BigInteger.valueOf(12)), BigInteger.ONE,
+            AbilityDefinition.Activation.IMMEDIATE, ControlInput.Gesture.USE, current.cooldown(),
+            Map.of("base-damage", new BigDecimal(current.baseDamage()),
+                "initial-range", BigDecimal.valueOf(current.initialRange()).stripTrailingZeros(),
+                "jump-range", BigDecimal.valueOf(current.jumpRange()).stripTrailingZeros(),
+                "additional-targets", BigDecimal.valueOf(current.additionalTargets()),
+                "jump-multiplier", current.jumpMultiplier()), AbilityDefinition.TargetPolicy.SELECTION, this);
+    }
+
+    public static BigInteger initialDamage(BigInteger intelligence) { return initialDamage(BigInteger.valueOf(8), intelligence); }
+    static BigInteger initialDamage(BigInteger base, BigInteger intelligence) {
+        Objects.requireNonNull(base); Objects.requireNonNull(intelligence);
+        if (base.signum() < 0 || intelligence.signum() < 0) throw new IllegalArgumentException("Invalid Chain Lightning damage input");
+        var delta = intelligence.subtract(BigInteger.TEN); var divided = delta.divideAndRemainder(BigInteger.TWO);
+        var modifier = divided[0]; if (delta.signum() < 0 && divided[1].signum() != 0) modifier = modifier.subtract(BigInteger.ONE);
+        return base.add(modifier);
+    }
+
+    @Override public boolean accepts(ControlInput input) {
+        return !closed && selectInitial(input, settings.initialRange()) != null;
+    }
+
+    @Override public void activate(AbilityExecution execution) {
+        if (closed || !execution.stillCurrent()) return;
+        var captured = from(execution.definition()); var caster = execution.input().player();
+        var initial = selectInitial(execution.input(), captured.initialRange());
+        if (initial == null) return;
+        BigDecimal defined = new BigDecimal(initialDamage(captured.baseDamage(), execution.character().stats().get(Stat.INT)));
+        var visited = new HashSet<UUID>(); LivingEntity current = initial;
+        int maximum = Math.min(64, 1 + captured.additionalTargets());
+        for (int strike = 0; strike < maximum && current != null && execution.stillCurrent(); strike++) {
+            if (!visited.add(current.getUniqueId()) || !eligible(caster, current)) break;
+            strike(execution, caster, current, defined); visual(caster, current);
+            if (strike + 1 == maximum) break;
+            defined = defined.multiply(captured.jumpMultiplier());
+            current = next(caster, current, visited, captured.jumpRange());
+        }
+    }
+
+    private void strike(AbilityExecution execution, Player caster, LivingEntity target, BigDecimal defined) {
+        double amount = finite(definiteNonnegative(defined));
+        var origin = caster.getEyeLocation().clone();
+        var source = DamageSource.builder(DamageType.LIGHTNING_BOLT).withCausingEntity(caster)
+            .withDirectEntity(caster).withDamageLocation(origin).build();
+        var attempt = new Attempt(execution, target); damaging = attempt;
+        try { target.damage(amount, source); }
+        finally { if (damaging == attempt) damaging = null; }
+    }
+
+    private LivingEntity selectInitial(ControlInput input, double range) {
+        var caster = input.player();
+        if (input.target() instanceof LivingEntity supplied && eligible(caster, supplied)
+                && inRangeAndVisible(caster, supplied, range)) return supplied;
+        try {
+            var eye = caster.getEyeLocation();
+            var hit = caster.getWorld().rayTraceEntities(eye, eye.getDirection(), range, entity ->
+                entity instanceof LivingEntity target && eligible(caster, target) && inRangeAndVisible(caster, target, range));
+            if (hit == null || !(hit.getHitEntity() instanceof LivingEntity target)) return null;
+            return eligible(caster, target) && inRangeAndVisible(caster, target, range) ? target : null;
+        } catch (RuntimeException unavailable) { return null; }
+    }
+
+    private LivingEntity next(Player caster, LivingEntity previous, Set<UUID> visited, double range) {
+        List<Entity> nearby;
+        try { nearby = previous.getNearbyEntities(range, range, range); }
+        catch (RuntimeException unavailable) { return null; }
+        var candidates = new ArrayList<LivingEntity>(); var seen = new HashSet<UUID>(); int inspected = 0;
+        for (var entity : nearby) {
+            if (++inspected > 256) break;
+            if (entity instanceof LivingEntity target && seen.add(target.getUniqueId()) && !visited.contains(target.getUniqueId())
+                    && eligible(caster, target) && inRangeAndVisible(previous, target, range)) candidates.add(target);
+        }
+        var origin = previous.getLocation();
+        candidates.sort(Comparator.comparingDouble((LivingEntity target) -> distance(origin, target))
+            .thenComparing(LivingEntity::getUniqueId));
+        return candidates.isEmpty() ? null : candidates.getFirst();
+    }
+
+    private boolean eligible(Player caster, LivingEntity target) {
+        if (target == caster) return false;
+        if (!(target instanceof Player player)) return true;
+        if (sessions.active(player.getUniqueId()).filter(sessions::current).isEmpty()) return false;
+        var sourceParty = parties.partyOf(caster.getUniqueId()).orElse(null);
+        var targetParty = parties.partyOf(player.getUniqueId()).orElse(null);
+        return sourceParty == null || targetParty == null || !sourceParty.id().equals(targetParty.id());
+    }
+
+    private static boolean inRangeAndVisible(LivingEntity source, LivingEntity target, double range) {
+        try {
+            var from = source.getLocation(); var to = target.getLocation();
+            return from.getWorld() == to.getWorld() && from.distanceSquared(to) <= range * range && source.hasLineOfSight(target);
+        } catch (RuntimeException invalid) { return false; }
+    }
+    private static double distance(Location origin, LivingEntity target) {
+        try { var location = target.getLocation(); return origin.getWorld() == location.getWorld()
+            ? origin.distanceSquared(location) : Double.POSITIVE_INFINITY; }
+        catch (RuntimeException invalid) { return Double.POSITIVE_INFINITY; }
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void acceptedDamage(EntityDamageEvent event) {
+        var attempt = damaging;
+        if (attempt == null || attempt.accepted || event.getEntity() != attempt.target
+                || event.getCause() != EntityDamageEvent.DamageCause.LIGHTNING
+                || event.getFinalDamage() <= 0 || !Double.isFinite(event.getFinalDamage())) return;
+        attempt.accepted = true;
+        attempt.execution.report(AbilityReport.Type.DAMAGE, attempt.target, BigDecimal.valueOf(event.getFinalDamage()));
+    }
+
+    private static void visual(Player caster, LivingEntity target) {
+        try {
+            var location = target.getLocation().clone().add(0, target.getHeight() / 2, 0);
+            caster.getWorld().spawnParticle(Particle.ELECTRIC_SPARK, location, 18, 0.3, 0.5, 0.3, 0.02);
+            caster.getWorld().playSound(location, Sound.ENTITY_LIGHTNING_BOLT_THUNDER, 0.35f, 1.7f);
+        } catch (RuntimeException ignored) { }
+    }
+    private static BigDecimal definiteNonnegative(BigDecimal value) { return value.signum() < 0 ? BigDecimal.ZERO : value; }
+    private static double finite(BigDecimal value) {
+        if (value.compareTo(BigDecimal.valueOf(Double.MAX_VALUE)) > 0) return Double.MAX_VALUE;
+        double result = value.doubleValue(); return Double.isFinite(result) ? result : Double.MAX_VALUE;
+    }
+    private static Settings from(AbilityDefinition definition) {
+        var p = definition.parameters();
+        return new Settings(p.get("base-damage").toBigIntegerExact(), definition.cooldown(), p.get("initial-range").doubleValue(),
+            p.get("jump-range").doubleValue(), p.get("additional-targets").intValueExact(), p.get("jump-multiplier"));
+    }
+    private static String decimal(BigDecimal value) { return value.stripTrailingZeros().toPlainString(); }
+    @Override public void close() { closed = true; damaging = null; }
+}

src/main/java/games/dmg/fantasystick/ability/CombatMitigation.java

@@ -0,0 +1,86 @@
+package games.dmg.fantasystick.ability;
+
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.IdentityHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.function.BooleanSupplier;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDamageByEntityEvent;
+import org.bukkit.event.entity.EntityDamageEvent;
+
+/** Internal strongest-reduction stage shared by Fantasy Stick protection effects. */
+public final class CombatMitigation implements Listener, AutoCloseable {
+    private final class Grant implements AutoCloseable {
+        final AbilityExecution execution; final Player player; final BigDecimal percent; final BooleanSupplier current; boolean closed;
+        Grant(AbilityExecution execution, Player player, BigDecimal percent, BooleanSupplier current) {
+            this.execution = execution; this.player = player; this.percent = percent; this.current = current;
+        }
+        boolean valid() {
+            try { return !closed && execution.stillCurrent() && current.getAsBoolean(); }
+            catch (RuntimeException invalid) { return false; }
+        }
+        @Override public void close() {
+            if (closed) return; closed = true;
+            var owned = grants.get(player.getUniqueId());
+            if (owned != null) { owned.remove(this); if (owned.isEmpty()) grants.remove(player.getUniqueId()); }
+        }
+    }
+    private record Prevention(Grant grant, BigDecimal amount) { }
+    private final Map<UUID, List<Grant>> grants = new java.util.HashMap<>();
+    private final Map<EntityDamageEvent, Prevention> pending = new IdentityHashMap<>();
+    private boolean closed;
+
+    public AutoCloseable grant(AbilityExecution execution, Player player, BigDecimal percent) {
+        return grant(execution, player, percent, () -> true);
+    }
+
+    public AutoCloseable grant(AbilityExecution execution, Player player, BigDecimal percent, BooleanSupplier current) {
+        Objects.requireNonNull(execution); Objects.requireNonNull(player); Objects.requireNonNull(percent); Objects.requireNonNull(current);
+        if (closed || percent.signum() < 0 || percent.compareTo(BigDecimal.valueOf(100)) > 0)
+            throw new IllegalArgumentException("Invalid combat mitigation grant");
+        var grant = new Grant(execution, player, percent, current);
+        grants.computeIfAbsent(player.getUniqueId(), ignored -> new ArrayList<>()).add(grant);
+        return grant;
+    }
+
+    @EventHandler(priority = EventPriority.HIGH, ignoreCancelled = true)
+    public void reduce(EntityDamageByEntityEvent event) {
+        if (closed || !(event.getEntity() instanceof Player player)) return;
+        Grant strongest = null;
+        var owned = grants.get(player.getUniqueId());
+        if (owned == null) return;
+        for (var grant : List.copyOf(owned)) {
+            if (grant.player != player || !grant.valid()) continue;
+            if (strongest == null || grant.percent.compareTo(strongest.percent) > 0) strongest = grant;
+        }
+        double original = event.getDamage();
+        if (strongest == null || !Double.isFinite(original) || original <= 0) return;
+        double reduced = BigDecimal.valueOf(original)
+            .multiply(BigDecimal.ONE.subtract(strongest.percent.movePointLeft(2))).doubleValue();
+        if (!Double.isFinite(reduced) || reduced < 0) return;
+        event.setDamage(reduced);
+        BigDecimal prevented = BigDecimal.valueOf(original - reduced);
+        if (prevented.signum() > 0) pending.put(event, new Prevention(strongest, prevented));
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void accepted(EntityDamageEvent event) {
+        var prevention = pending.remove(event);
+        if (prevention == null || event.isCancelled() || event.getFinalDamage() <= 0
+                || !prevention.grant.valid()) return;
+        prevention.grant.execution.report(AbilityReport.Type.PREVENTION, event.getEntity(), prevention.amount);
+    }
+
+    @Override public void close() {
+        if (closed) return; closed = true;
+        for (var owned : List.copyOf(grants.values())) for (var grant : List.copyOf(owned)) grant.close();
+        grants.clear(); pending.clear();
+    }
+}

src/main/java/games/dmg/fantasystick/ability/Fireball.java

@@ -0,0 +1,162 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.Particle;
+import org.bukkit.damage.DamageSource;
+import org.bukkit.damage.DamageType;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Snowball;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDamageEvent;
+import org.bukkit.event.entity.ProjectileHitEvent;
+import org.bukkit.util.Vector;
+
+/** Fireball's owned snowball projectile, direct custom damage and bounded cleanup adapter. */
+public final class Fireball implements AbilityEffect, Listener, AutoCloseable {
+    private static final double SPEED_PER_TICK = 1.0;
+
+    public record Settings(BigInteger baseDamage, Duration cooldown, double range, Duration lifetime) {
+        public Settings {
+            Objects.requireNonNull(baseDamage); Objects.requireNonNull(cooldown); Objects.requireNonNull(lifetime);
+            if (baseDamage.signum() < 0 || cooldown.isNegative() || cooldown.compareTo(Duration.ofDays(365)) > 0
+                    || !Double.isFinite(range) || range <= 0 || range > 1024
+                    || lifetime.isZero() || lifetime.isNegative() || lifetime.compareTo(Duration.ofSeconds(60)) > 0) {
+                throw new IllegalArgumentException("Invalid Fireball settings");
+            }
+        }
+        public static Settings defaults() {
+            return new Settings(BigInteger.valueOf(6), Duration.ofSeconds(4), 32, Duration.ofSeconds(5));
+        }
+    }
+
+    private final Settings settings;
+    private final Map<UUID, State> projectiles = new HashMap<>();
+    private State damaging;
+    private boolean closed;
+
+    private final class State implements AutoCloseable {
+        final Snowball projectile;
+        final AbilityExecution execution;
+        final Location origin;
+        final BigInteger intelligence;
+        LivingEntity target;
+        boolean finished;
+        State(Snowball projectile, AbilityExecution execution, Location origin, BigInteger intelligence) {
+            this.projectile = projectile; this.execution = execution; this.origin = origin; this.intelligence = intelligence;
+        }
+        @Override public void close() {
+            if (finished) return;
+            finished = true;
+            projectiles.remove(projectile.getUniqueId(), this);
+            projectile.remove();
+        }
+    }
+
+    public Fireball(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+
+    public AbilityDefinition definition() {
+        return new AbilityDefinition("fireball", "Fireball", Material.SNOWBALL,
+            List.of("Launch a bounded fiery snowball.", "Deals " + settings.baseDamage() + " + INT modifier damage."),
+            "Use the equipped snowball; a miss still spends the cooldown.",
+            Map.of(Stat.INT, BigInteger.valueOf(12)), BigInteger.ONE,
+            AbilityDefinition.Activation.PROJECTILE, ControlInput.Gesture.USE, settings.cooldown(),
+            Map.of("base-damage", new BigDecimal(settings.baseDamage()),
+                "range", BigDecimal.valueOf(settings.range()).stripTrailingZeros(),
+                "lifetime", BigDecimal.valueOf(settings.lifetime().toMillis(), 3).stripTrailingZeros()),
+            AbilityDefinition.TargetPolicy.PROJECTILE_HOSTILE, this);
+    }
+
+    public static BigInteger damage(BigInteger intelligence) {
+        return damage(BigInteger.valueOf(6), intelligence);
+    }
+
+    static BigInteger damage(BigInteger base, BigInteger intelligence) {
+        Objects.requireNonNull(base); Objects.requireNonNull(intelligence);
+        if (base.signum() < 0 || intelligence.signum() < 0) throw new IllegalArgumentException("Invalid Fireball damage input");
+        BigInteger delta = intelligence.subtract(BigInteger.TEN);
+        BigInteger[] divided = delta.divideAndRemainder(BigInteger.TWO);
+        BigInteger modifier = divided[0];
+        if (delta.signum() < 0 && divided[1].signum() != 0) modifier = modifier.subtract(BigInteger.ONE);
+        return base.add(modifier);
+    }
+
+    @Override public void activate(AbilityExecution execution) {
+        if (closed || !execution.stillCurrent()) return;
+        var player = execution.input().player();
+        Location origin = player.getEyeLocation().clone();
+        Vector direction = origin.getDirection();
+        if (!Double.isFinite(direction.getX()) || !Double.isFinite(direction.getY()) || !Double.isFinite(direction.getZ())
+                || direction.lengthSquared() == 0) throw new IllegalStateException("Fireball direction is unavailable");
+        var projectile = player.launchProjectile(Snowball.class, direction.normalize().multiply(SPEED_PER_TICK));
+        projectile.setVisualFire(true);
+        var state = new State(projectile, execution, origin, execution.character().stats().get(Stat.INT));
+        if (projectiles.putIfAbsent(projectile.getUniqueId(), state) != null) {
+            projectile.remove(); throw new IllegalStateException("Duplicate Fireball projectile identity");
+        }
+        execution.own(state);
+        long rangeTicks = Math.max(1, (long) Math.ceil(settings.range() / SPEED_PER_TICK));
+        execution.later(Duration.ofMillis(Math.multiplyExact(rangeTicks, 50)), execution::finish);
+        execution.later(settings.lifetime(), execution::finish);
+        player.getWorld().spawnParticle(Particle.FLAME, origin, 8, 0.15, 0.15, 0.15, 0.01);
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void hit(ProjectileHitEvent event) {
+        var state = projectiles.remove(event.getEntity().getUniqueId());
+        if (state == null) return;
+        try {
+            if (closed || event.isCancelled() || !state.execution.stillCurrent()
+                    || !(event.getHitEntity() instanceof LivingEntity target) || !inRange(state, event.getEntity().getLocation())
+                    || state.execution.eligible(List.of(target), 1).isEmpty()) return;
+            BigInteger amount = damage(settings.baseDamage(), state.intelligence);
+            double nativeDamage = amount.bitLength() > 1023 ? Double.MAX_VALUE : amount.doubleValue();
+            var source = DamageSource.builder(DamageType.FIREBALL).withCausingEntity(state.execution.input().player())
+                .withDirectEntity(state.projectile).withDamageLocation(state.projectile.getLocation()).build();
+            state.target = target;
+            damaging = state;
+            try { target.damage(nativeDamage, source); }
+            finally { if (damaging == state) damaging = null; }
+        } finally {
+            state.execution.finish();
+        }
+    }
+
+    private boolean inRange(State state, Location current) {
+        return current.getWorld() != null && state.origin.getWorld() != null
+            && current.getWorld().equals(state.origin.getWorld())
+            && current.distanceSquared(state.origin) <= settings.range() * settings.range();
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void acceptedDamage(EntityDamageEvent event) {
+        var state = damaging;
+        if (state == null || event.getEntity() != state.target || event.getFinalDamage() <= 0
+                || !Double.isFinite(event.getFinalDamage())) return;
+        var direct = event.getDamageSource().getDirectEntity();
+        if (direct != state.projectile && (!(event instanceof org.bukkit.event.entity.EntityDamageByEntityEvent byEntity)
+                || byEntity.getDamager() != state.projectile)) return;
+        var causing = event.getDamageSource().getCausingEntity();
+        if (causing != null && causing != state.execution.input().player()) return;
+        state.execution.report(AbilityReport.Type.DAMAGE, event.getEntity(), BigDecimal.valueOf(event.getFinalDamage()));
+    }
+
+    @Override public void close() {
+        if (closed) return;
+        closed = true;
+        for (var state : List.copyOf(projectiles.values())) state.execution.finish();
+        projectiles.clear(); damaging = null;
+    }
+}

src/main/java/games/dmg/fantasystick/ability/FrostNova.java

@@ -0,0 +1,234 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.party.PartyRoster;
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.Particle;
+import org.bukkit.damage.DamageSource;
+import org.bukkit.damage.DamageType;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDamageEvent;
+import org.bukkit.potion.PotionEffect;
+import org.bukkit.potion.PotionEffectType;
+
+/** Bounded instantaneous Frost Nova damage and ownership-aware Slowness. */
+public final class FrostNova implements AbilityEffect, Listener, AutoCloseable {
+    public record Settings(BigInteger baseDamage, Duration cooldown, double radius,
+                           int slownessAmplifier, Duration slownessDuration) {
+        public Settings {
+            Objects.requireNonNull(baseDamage); Objects.requireNonNull(cooldown); Objects.requireNonNull(slownessDuration);
+            if (baseDamage.signum() < 0 || cooldown.isNegative() || cooldown.compareTo(Duration.ofDays(365)) > 0
+                    || !Double.isFinite(radius) || radius <= 0 || radius > 64
+                    || slownessAmplifier < 0 || slownessAmplifier > 255
+                    || slownessDuration.isNegative() || slownessDuration.isZero()
+                    || slownessDuration.compareTo(Duration.ofDays(1)) > 0) {
+                throw new IllegalArgumentException("Invalid Frost Nova settings");
+            }
+        }
+        public static Settings defaults() {
+            return new Settings(BigInteger.valueOf(5), Duration.ofSeconds(12), 5, 1, Duration.ofSeconds(3));
+        }
+    }
+
+    private static final class SlowLease implements AutoCloseable {
+        final LivingEntity target; final PotionEffect previous; final PotionEffect applied;
+        final long started = System.nanoTime(); boolean owned; boolean closed;
+        SlowLease(LivingEntity target, PotionEffect applied) {
+            this.target = target; previous = target.getPotionEffect(PotionEffectType.SLOWNESS); this.applied = applied;
+        }
+        boolean apply() { owned = target.addPotionEffect(applied); return owned; }
+        @Override public void close() {
+            if (closed) return; closed = true; if (!owned) return;
+            var current = target.getPotionEffect(PotionEffectType.SLOWNESS);
+            long elapsed = Math.max(0, (System.nanoTime() - started) / 50_000_000L);
+            int expected = (int) Math.max(0, (long) applied.getDuration() - elapsed);
+            if (current == null || current.getAmplifier() != applied.getAmplifier()
+                    || current.getDuration() > expected + 2) return;
+            target.removePotionEffect(PotionEffectType.SLOWNESS);
+            if (previous != null) {
+                int remaining = (int) Math.max(0, (long) previous.getDuration() - elapsed);
+                if (remaining > 0) target.addPotionEffect(previous.withDuration(remaining));
+            }
+        }
+    }
+    private final class LeaseGroup implements AutoCloseable {
+        final AbilityExecution execution; final List<SlowLease> leases = new ArrayList<>(); boolean closed;
+        LeaseGroup(AbilityExecution execution) { this.execution = execution; }
+        @Override public void close() {
+            if (closed) return; closed = true; active.remove(execution, this);
+            for (var lease : List.copyOf(leases)) lease.close(); leases.clear();
+        }
+    }
+    private static final class Attempt {
+        final AbilityExecution execution; final LivingEntity target; boolean accepted;
+        Attempt(AbilityExecution execution, LivingEntity target) { this.execution = execution; this.target = target; }
+    }
+
+    private volatile Settings settings;
+    private final EquipmentSessions sessions;
+    private final PartyRoster parties;
+    private final Map<AbilityExecution, LeaseGroup> active = new java.util.IdentityHashMap<>();
+    private Attempt damaging;
+    private boolean closed;
+
+    public FrostNova(Settings settings, EquipmentSessions sessions, PartyRoster parties) {
+        this.settings = Objects.requireNonNull(settings); this.sessions = Objects.requireNonNull(sessions);
+        this.parties = Objects.requireNonNull(parties);
+    }
+    public void configure(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+
+    public AbilityDefinition definition() {
+        var current = settings;
+        return new AbilityDefinition("frost_nova", "Frost Nova", Material.SNOWBALL,
+            List.of("Burst in a " + decimal(BigDecimal.valueOf(current.radius())) + "-block sphere for "
+                    + current.baseDamage() + " + INT modifier damage.",
+                "Applies Slowness " + level(current.slownessAmplifier()) + " for " + seconds(current.slownessDuration()) + " seconds."),
+            "Use to affect exposed enemies; caster, party and ordinary players are excluded.",
+            Map.of(Stat.INT, BigInteger.valueOf(16), Stat.DEX, BigInteger.TEN), BigInteger.ONE,
+            AbilityDefinition.Activation.DELAYED, ControlInput.Gesture.USE, current.cooldown(),
+            Map.of("base-damage", new BigDecimal(current.baseDamage()),
+                "radius", BigDecimal.valueOf(current.radius()).stripTrailingZeros(),
+                "slowness-amplifier", BigDecimal.valueOf(current.slownessAmplifier()),
+                "slowness-duration-seconds", BigDecimal.valueOf(current.slownessDuration().toNanos()).movePointLeft(9)),
+            AbilityDefinition.TargetPolicy.AREA, this);
+    }
+
+    public static BigInteger damage(BigInteger intelligence) { return damage(BigInteger.valueOf(5), intelligence); }
+    static BigInteger damage(BigInteger base, BigInteger intelligence) {
+        Objects.requireNonNull(base); Objects.requireNonNull(intelligence);
+        if (base.signum() < 0 || intelligence.signum() < 0) throw new IllegalArgumentException("Invalid Frost Nova damage input");
+        var delta = intelligence.subtract(BigInteger.TEN); var divided = delta.divideAndRemainder(BigInteger.TWO);
+        var modifier = divided[0]; if (delta.signum() < 0 && divided[1].signum() != 0) modifier = modifier.subtract(BigInteger.ONE);
+        return base.add(modifier);
+    }
+
+    @Override public boolean accepts(ControlInput input) { return !closed && input.target() == null; }
+    @Override public void activate(AbilityExecution execution) {
+        if (closed || !execution.stillCurrent()) return;
+        var captured = from(execution.definition()); var source = execution.input().player();
+        Location origin = source.getEyeLocation().clone();
+        var group = new LeaseGroup(execution); active.put(execution, group); execution.own(group);
+        BigInteger exact = damage(captured.baseDamage(), execution.character().stats().get(Stat.INT));
+        double amount = exact.bitLength() > 1023 ? Double.MAX_VALUE : exact.doubleValue();
+        int affected = 0;
+        for (var target : candidates(source, origin, captured.radius())) {
+            if (affected == 64 || !execution.stillCurrent()) break;
+            if (!eligible(execution, target, origin, captured.radius())) continue;
+            var sourceDamage = DamageSource.builder(DamageType.FREEZE).withCausingEntity(source)
+                .withDirectEntity(source).withDamageLocation(origin).build();
+            var attempt = new Attempt(execution, target); damaging = attempt;
+            try { target.damage(amount, sourceDamage); }
+            finally { if (damaging == attempt) damaging = null; }
+            affected++;
+            if (!attempt.accepted || !execution.stillCurrent() || !eligible(execution, target, origin, captured.radius())) continue;
+            int ticks = Math.toIntExact(Math.max(1,
+                (captured.slownessDuration().toNanos() + 49_999_999L) / 50_000_000L));
+            var lease = new SlowLease(target, new PotionEffect(PotionEffectType.SLOWNESS, ticks,
+                captured.slownessAmplifier(), false, true, true));
+            if (lease.apply()) group.leases.add(lease);
+        }
+        try { source.getWorld().spawnParticle(Particle.SNOWFLAKE, origin, 32,
+            captured.radius() / 2, captured.radius() / 2, captured.radius() / 2, 0.01); }
+        catch (RuntimeException ignored) { }
+        if (group.leases.isEmpty()) execution.finish();
+        else execution.later(captured.slownessDuration(), execution::finish);
+    }
+
+    private List<LivingEntity> candidates(Player source, Location origin, double radius) {
+        List<Entity> nearby;
+        try { nearby = source.getNearbyEntities(radius, radius, radius); }
+        catch (RuntimeException unavailable) { return List.of(); }
+        var unique = new LinkedHashMap<UUID, LivingEntity>(); int inspected = 0;
+        for (var entity : nearby) {
+            if (++inspected > 256) break;
+            if (entity instanceof LivingEntity target && target != source) unique.putIfAbsent(target.getUniqueId(), target);
+        }
+        var result = new ArrayList<>(unique.values());
+        result.sort(Comparator.comparingDouble((LivingEntity target) -> distance(origin, target))
+            .thenComparing(LivingEntity::getUniqueId));
+        return result;
+    }
+
+    private boolean eligible(AbilityExecution execution, LivingEntity target, Location origin, double radius) {
+        if (target == execution.input().player() || !inside(origin, target, radius)) return false;
+        try {
+            if (!execution.input().player().hasLineOfSight(target) || !unobstructed(origin, target)) return false;
+        } catch (RuntimeException unavailable) { return false; }
+        if (!(target instanceof Player player)) return true;
+        var active = sessions.active(player.getUniqueId()).filter(sessions::current).orElse(null);
+        if (active == null) return false;
+        var sourceParty = parties.partyOf(execution.input().player().getUniqueId()).orElse(null);
+        var targetParty = parties.partyOf(player.getUniqueId()).orElse(null);
+        return sourceParty == null || targetParty == null || !sourceParty.id().equals(targetParty.id());
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void acceptedDamage(EntityDamageEvent event) {
+        var attempt = damaging;
+        if (attempt == null || attempt.accepted || event.getEntity() != attempt.target
+                || event.getCause() != EntityDamageEvent.DamageCause.FREEZE
+                || event.getFinalDamage() <= 0 || !Double.isFinite(event.getFinalDamage())) return;
+        attempt.accepted = true;
+        attempt.execution.report(AbilityReport.Type.DAMAGE, attempt.target, BigDecimal.valueOf(event.getFinalDamage()));
+    }
+
+    private static boolean unobstructed(Location origin, LivingEntity target) {
+        var world = origin.getWorld(); if (world == null) return false;
+        var location = target.getLocation(); if (location.getWorld() != world) return false;
+        var bounds = target.getBoundingBox();
+        var center = bounds == null ? location.toVector().add(new org.bukkit.util.Vector(0, target.getHeight() / 2, 0))
+            : bounds.getCenter();
+        var offset = center.clone().subtract(origin.toVector()); double distance = offset.length();
+        if (!Double.isFinite(distance) || distance == 0) return distance == 0;
+        return world.rayTraceBlocks(origin, offset.multiply(1 / distance), distance,
+            org.bukkit.FluidCollisionMode.NEVER, true) == null;
+    }
+
+    private static boolean inside(Location origin, LivingEntity target, double radius) {
+        try { var location = target.getLocation(); return origin.getWorld() == location.getWorld()
+            && origin.distanceSquared(location) <= radius * radius; }
+        catch (RuntimeException invalid) { return false; }
+    }
+    private static double distance(Location origin, LivingEntity target) {
+        try { var location = target.getLocation(); return origin.getWorld() == location.getWorld()
+            ? origin.distanceSquared(location) : Double.POSITIVE_INFINITY; }
+        catch (RuntimeException invalid) { return Double.POSITIVE_INFINITY; }
+    }
+    private static Settings from(AbilityDefinition definition) {
+        var parameters = definition.parameters();
+        return new Settings(parameters.get("base-damage").toBigIntegerExact(), definition.cooldown(),
+            parameters.get("radius").doubleValue(), parameters.get("slowness-amplifier").intValueExact(),
+            Duration.ofNanos(parameters.get("slowness-duration-seconds").movePointRight(9).longValueExact()));
+    }
+    private static String decimal(BigDecimal value) { return value.stripTrailingZeros().toPlainString(); }
+    private static String seconds(Duration duration) {
+        return decimal(BigDecimal.valueOf(duration.toNanos()).movePointLeft(9));
+    }
+    private static String level(int amplifier) {
+        return switch (amplifier + 1) { case 1 -> "I"; case 2 -> "II"; case 3 -> "III"; case 4 -> "IV"; default -> Integer.toString(amplifier + 1); };
+    }
+
+    @Override public void close() {
+        if (closed) return; closed = true; damaging = null;
+        for (var group : List.copyOf(active.values())) { group.close(); group.execution.finish(); }
+        active.clear();
+    }
+}

src/main/java/games/dmg/fantasystick/ability/FrostShard.java

@@ -0,0 +1,233 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.Particle;
+import org.bukkit.damage.DamageSource;
+import org.bukkit.damage.DamageType;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Snowball;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDamageEvent;
+import org.bukkit.event.entity.ProjectileHitEvent;
+import org.bukkit.potion.PotionEffect;
+import org.bukkit.potion.PotionEffectType;
+import org.bukkit.util.Vector;
+
+/** Frost Shard's bounded direct projectile damage and owned Slowness adapter. */
+public final class FrostShard implements AbilityEffect, Listener, AutoCloseable {
+    public record Settings(BigInteger baseDamage, Duration cooldown, double range, Duration lifetime,
+                           double speedPerTick, int slownessAmplifier, Duration slownessDuration) {
+        public Settings {
+            Objects.requireNonNull(baseDamage); Objects.requireNonNull(cooldown); Objects.requireNonNull(lifetime);
+            Objects.requireNonNull(slownessDuration);
+            if (baseDamage.signum() < 0 || cooldown.isNegative() || cooldown.compareTo(Duration.ofDays(365)) > 0
+                    || !Double.isFinite(range) || range <= 0 || range > 1024
+                    || lifetime.isZero() || lifetime.isNegative() || lifetime.compareTo(Duration.ofSeconds(60)) > 0
+                    || !Double.isFinite(speedPerTick) || speedPerTick < 0.01 || speedPerTick > 64
+                    || slownessAmplifier < 0 || slownessAmplifier > 255
+                    || slownessDuration.isZero() || slownessDuration.isNegative()
+                    || slownessDuration.compareTo(Duration.ofDays(1)) > 0) {
+                throw new IllegalArgumentException("Invalid Frost Shard settings");
+            }
+        }
+        public static Settings defaults() {
+            return new Settings(BigInteger.valueOf(4), Duration.ofSeconds(5), 32, Duration.ofSeconds(5),
+                1, 0, Duration.ofSeconds(2));
+        }
+    }
+
+    private final class State implements AutoCloseable {
+        final Snowball projectile;
+        final AbilityExecution execution;
+        final Location origin;
+        final BigInteger intelligence;
+        final Settings settings;
+        LivingEntity target;
+        boolean accepted;
+        boolean finished;
+        State(Snowball projectile, AbilityExecution execution, Location origin, BigInteger intelligence, Settings settings) {
+            this.projectile = projectile; this.execution = execution; this.origin = origin;
+            this.intelligence = intelligence; this.settings = settings;
+        }
+        @Override public void close() {
+            if (finished) return;
+            finished = true; projectiles.remove(projectile.getUniqueId(), this); projectile.remove();
+        }
+    }
+
+    private static final class SlowLease implements AutoCloseable {
+        private final LivingEntity target;
+        private final PotionEffect previous;
+        private final PotionEffect applied;
+        private final long started = System.nanoTime();
+        private boolean owned;
+        private boolean closed;
+        SlowLease(LivingEntity target, PotionEffect applied) {
+            this.target = target; this.previous = target.getPotionEffect(PotionEffectType.SLOWNESS); this.applied = applied;
+        }
+        boolean apply() { owned = target.addPotionEffect(applied); return owned; }
+        @Override public void close() {
+            if (closed) return;
+            closed = true;
+            if (!owned) return;
+            var current = target.getPotionEffect(PotionEffectType.SLOWNESS);
+            long elapsed = Math.max(0, (System.nanoTime() - started) / 50_000_000L);
+            int expected = (int) Math.max(0, (long) applied.getDuration() - elapsed);
+            if (current == null || current.getAmplifier() != applied.getAmplifier()
+                    || current.getDuration() > expected + 2) return;
+            target.removePotionEffect(PotionEffectType.SLOWNESS);
+            if (previous != null) {
+                int remaining = (int) Math.max(0, (long) previous.getDuration() - elapsed);
+                if (remaining > 0) target.addPotionEffect(previous.withDuration(remaining));
+            }
+        }
+    }
+
+    private volatile Settings settings;
+    private final Map<UUID, State> projectiles = new HashMap<>();
+    private State damaging;
+    private boolean closed;
+
+    public FrostShard(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+
+    public void configure(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+
+    public AbilityDefinition definition() {
+        var current = settings;
+        return new AbilityDefinition("frost_shard", "Frost Shard", Material.PRISMARINE_SHARD,
+            List.of("Launch a bounded frost projectile.",
+                "Deals " + current.baseDamage() + " + INT modifier damage and Slowness "
+                    + level(current.slownessAmplifier()) + " for " + seconds(current.slownessDuration()) + "s."),
+            "Use the equipped shard; a miss still spends the cooldown.",
+            Map.of(Stat.INT, BigInteger.valueOf(12), Stat.WIS, BigInteger.TEN), BigInteger.ONE,
+            AbilityDefinition.Activation.PROJECTILE, ControlInput.Gesture.USE, current.cooldown(),
+            Map.of("base-damage", new BigDecimal(current.baseDamage()),
+                "range", BigDecimal.valueOf(current.range()).stripTrailingZeros(),
+                "lifetime", seconds(current.lifetime()), "projectile-speed", BigDecimal.valueOf(current.speedPerTick()),
+                "slowness-amplifier", BigDecimal.valueOf(current.slownessAmplifier()),
+                "slowness-duration", seconds(current.slownessDuration())),
+            AbilityDefinition.TargetPolicy.PROJECTILE_HOSTILE, this);
+    }
+
+    public static BigInteger damage(BigInteger intelligence) {
+        return damage(BigInteger.valueOf(4), intelligence);
+    }
+
+    static BigInteger damage(BigInteger base, BigInteger intelligence) {
+        Objects.requireNonNull(base); Objects.requireNonNull(intelligence);
+        if (base.signum() < 0 || intelligence.signum() < 0) throw new IllegalArgumentException("Invalid Frost Shard damage input");
+        BigInteger delta = intelligence.subtract(BigInteger.TEN);
+        BigInteger[] divided = delta.divideAndRemainder(BigInteger.TWO);
+        BigInteger modifier = divided[0];
+        if (delta.signum() < 0 && divided[1].signum() != 0) modifier = modifier.subtract(BigInteger.ONE);
+        return base.add(modifier);
+    }
+
+    @Override public void activate(AbilityExecution execution) {
+        if (closed || !execution.stillCurrent()) return;
+        var current = settings;
+        var player = execution.input().player();
+        Location origin = player.getEyeLocation().clone();
+        Vector direction = origin.getDirection();
+        if (!Double.isFinite(direction.getX()) || !Double.isFinite(direction.getY()) || !Double.isFinite(direction.getZ())
+                || direction.lengthSquared() == 0) throw new IllegalStateException("Frost Shard direction is unavailable");
+        var projectile = player.launchProjectile(Snowball.class, direction.normalize().multiply(current.speedPerTick()));
+        var state = new State(projectile, execution, origin, execution.character().stats().get(Stat.INT), current);
+        if (projectiles.putIfAbsent(projectile.getUniqueId(), state) != null) {
+            projectile.remove(); throw new IllegalStateException("Duplicate Frost Shard projectile identity");
+        }
+        execution.own(state);
+        long rangeTicks = Math.max(1, (long) Math.ceil(current.range() / current.speedPerTick()));
+        execution.later(Duration.ofMillis(Math.multiplyExact(rangeTicks, 50)), () -> {
+            if (projectiles.containsKey(projectile.getUniqueId())) execution.finish();
+        });
+        execution.later(current.lifetime(), () -> {
+            if (projectiles.containsKey(projectile.getUniqueId())) execution.finish();
+        });
+        player.getWorld().spawnParticle(Particle.SNOWFLAKE, origin, 8, 0.15, 0.15, 0.15, 0.01);
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void hit(ProjectileHitEvent event) {
+        var state = projectiles.remove(event.getEntity().getUniqueId());
+        if (state == null) return;
+        boolean retainExecution = false;
+        try {
+            if (closed || event.isCancelled() || !state.execution.stillCurrent()
+                    || !(event.getHitEntity() instanceof LivingEntity target) || !inRange(state, event.getEntity().getLocation())
+                    || state.execution.eligible(List.of(target), 1).isEmpty()) return;
+            var current = state.settings;
+            BigInteger amount = damage(current.baseDamage(), state.intelligence);
+            double nativeDamage = amount.bitLength() > 1023 ? Double.MAX_VALUE : amount.doubleValue();
+            var source = DamageSource.builder(DamageType.FREEZE).withCausingEntity(state.execution.input().player())
+                .withDirectEntity(state.projectile).withDamageLocation(state.projectile.getLocation()).build();
+            state.target = target; damaging = state;
+            try { target.damage(nativeDamage, source); }
+            finally { if (damaging == state) damaging = null; }
+            if (state.accepted && state.execution.stillCurrent()) {
+                int ticks = Math.toIntExact(Math.max(1,
+                    (current.slownessDuration().toNanos() + 49_999_999L) / 50_000_000L));
+                var lease = new SlowLease(target, new PotionEffect(PotionEffectType.SLOWNESS, ticks,
+                    current.slownessAmplifier(), false, true, true));
+                if (lease.apply()) {
+                    state.execution.own(lease);
+                    state.execution.later(current.slownessDuration(), state.execution::finish);
+                    retainExecution = true;
+                }
+            }
+        } finally {
+            state.close();
+            if (!retainExecution) state.execution.finish();
+        }
+    }
+
+    private boolean inRange(State state, Location current) {
+        return current.getWorld() != null && state.origin.getWorld() != null
+            && current.getWorld().equals(state.origin.getWorld())
+            && current.distanceSquared(state.origin) <= state.settings.range() * state.settings.range();
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void acceptedDamage(EntityDamageEvent event) {
+        var state = damaging;
+        if (state == null || state.accepted || event.getEntity() != state.target || event.getFinalDamage() <= 0
+                || !Double.isFinite(event.getFinalDamage())) return;
+        var direct = event.getDamageSource().getDirectEntity();
+        if (direct != state.projectile && (!(event instanceof org.bukkit.event.entity.EntityDamageByEntityEvent byEntity)
+                || byEntity.getDamager() != state.projectile)) return;
+        state.accepted = true;
+        state.execution.report(AbilityReport.Type.DAMAGE, event.getEntity(), BigDecimal.valueOf(event.getFinalDamage()));
+    }
+
+    private static String level(int amplifier) {
+        return switch (amplifier + 1) {
+            case 1 -> "I"; case 2 -> "II"; case 3 -> "III"; case 4 -> "IV"; case 5 -> "V";
+            default -> Integer.toString(amplifier + 1);
+        };
+    }
+
+    private static BigDecimal seconds(Duration duration) {
+        return BigDecimal.valueOf(duration.getSeconds()).add(BigDecimal.valueOf(duration.getNano(), 9))
+            .stripTrailingZeros();
+    }
+
+    @Override public void close() {
+        if (closed) return;
+        closed = true;
+        for (var state : List.copyOf(projectiles.values())) state.execution.finish();
+        projectiles.clear(); damaging = null;
+    }
+}

src/main/java/games/dmg/fantasystick/ability/GreatSword.java

@@ -0,0 +1,116 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import org.bukkit.Material;
+import org.bukkit.damage.DamageSource;
+import org.bukkit.damage.DamageType;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDamageByEntityEvent;
+
+/** Great Sword's charge-scaled direct melee damage, replacing the contained native weapon hit. */
+public final class GreatSword implements AbilityEffect, Listener, AutoCloseable {
+    public record Settings(BigInteger baseDamage, Duration recovery) {
+        public Settings {
+            Objects.requireNonNull(baseDamage); Objects.requireNonNull(recovery);
+            if (baseDamage.signum() < 0 || recovery.isNegative()
+                    || recovery.compareTo(Duration.ofDays(365)) > 0) {
+                throw new IllegalArgumentException("Invalid Great Sword settings");
+            }
+        }
+        public static Settings defaults() { return new Settings(BigInteger.valueOf(7), Duration.ofMillis(1200)); }
+    }
+
+    private static final class Attempt {
+        final AbilityExecution execution;
+        final LivingEntity target;
+        boolean reported;
+        Attempt(AbilityExecution execution, LivingEntity target) {
+            this.execution = execution; this.target = target;
+        }
+    }
+
+    private final Settings settings;
+    private Attempt damaging;
+    private boolean closed;
+
+    public GreatSword(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+
+    public AbilityDefinition definition() {
+        return new AbilityDefinition("great_sword", "Great Sword", Material.WOODEN_SWORD,
+            List.of("Charge a contained melee strike.",
+                "Fully charged: " + settings.baseDamage() + " + STR modifier damage."),
+            "Attack with the equipped sword; partial charge follows the native attack curve.",
+            Map.of(Stat.STR, BigInteger.valueOf(12)), BigInteger.ONE,
+            AbilityDefinition.Activation.IMMEDIATE, ControlInput.Gesture.ATTACK, settings.recovery(),
+            Map.of("base-damage", new BigDecimal(settings.baseDamage())),
+            AbilityDefinition.TargetPolicy.HOSTILE, this);
+    }
+
+    public static BigDecimal damage(BigInteger strength, float charge) {
+        return damage(BigInteger.valueOf(7), strength, charge);
+    }
+
+    static BigDecimal damage(BigInteger base, BigInteger strength, float charge) {
+        Objects.requireNonNull(base); Objects.requireNonNull(strength);
+        if (base.signum() < 0 || strength.signum() < 0 || !Float.isFinite(charge) || charge < 0 || charge > 1) {
+            throw new IllegalArgumentException("Invalid Great Sword damage input");
+        }
+        BigInteger delta = strength.subtract(BigInteger.TEN);
+        BigInteger[] divided = delta.divideAndRemainder(BigInteger.TWO);
+        BigInteger modifier = divided[0];
+        if (delta.signum() < 0 && divided[1].signum() != 0) modifier = modifier.subtract(BigInteger.ONE);
+        BigDecimal full = new BigDecimal(base.add(modifier));
+        BigDecimal nativeCharge = new BigDecimal(Float.toString(charge));
+        BigDecimal curve = new BigDecimal("0.2").add(new BigDecimal("0.8").multiply(nativeCharge.multiply(nativeCharge)));
+        return full.multiply(curve).stripTrailingZeros();
+    }
+
+    @Override public boolean accepts(ControlInput input) {
+        return !closed && input.target() instanceof LivingEntity;
+    }
+
+    @Override public void activate(AbilityExecution execution) {
+        if (closed || !execution.stillCurrent() || !(execution.input().target() instanceof LivingEntity target)) return;
+        BigDecimal amount = damage(settings.baseDamage(), execution.character().stats().get(Stat.STR),
+            execution.input().attackStrength());
+        double nativeDamage = amount.compareTo(BigDecimal.valueOf(Double.MAX_VALUE)) > 0
+            ? Double.MAX_VALUE : amount.doubleValue();
+        if (!Double.isFinite(nativeDamage) || nativeDamage <= 0) {
+            throw new IllegalStateException("Great Sword damage is outside the native finite range");
+        }
+        var player = execution.input().player();
+        var source = DamageSource.builder(DamageType.PLAYER_ATTACK).withCausingEntity(player)
+            .withDirectEntity(player).build();
+        var attempt = new Attempt(execution, target);
+        damaging = attempt;
+        try { target.damage(nativeDamage, source); }
+        finally { if (damaging == attempt) damaging = null; }
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void acceptedDamage(EntityDamageByEntityEvent event) {
+        var attempt = damaging;
+        if (closed || attempt == null || attempt.reported || event.isCancelled()
+                || event.getDamager() != attempt.execution.input().player() || event.getEntity() != attempt.target
+                || (event.getDamageSource().getCausingEntity() != null
+                    && event.getDamageSource().getCausingEntity() != attempt.execution.input().player())
+                || (event.getDamageSource().getDirectEntity() != null
+                    && event.getDamageSource().getDirectEntity() != attempt.execution.input().player())
+                || event.getFinalDamage() <= 0 || !Double.isFinite(event.getFinalDamage())) return;
+        attempt.reported = true;
+        attempt.execution.report(AbilityReport.Type.DAMAGE, event.getEntity(),
+            BigDecimal.valueOf(event.getFinalDamage()).stripTrailingZeros());
+    }
+
+    @Override public void close() { closed = true; damaging = null; }
+}

src/main/java/games/dmg/fantasystick/ability/GuardianBond.java

@@ -0,0 +1,274 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.party.PartyRoster;
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.function.Consumer;
+import org.bukkit.Material;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.Player;
+import org.bukkit.entity.Projectile;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDamageByEntityEvent;
+import org.bukkit.projectiles.ProjectileSource;
+
+/** Conserved, non-recursive native combat redirection for Guardian Bond. */
+public final class GuardianBond implements AbilityEffect, Listener, AutoCloseable {
+    public record Settings(Duration cooldown, double range, Duration duration, BigDecimal redirectPercent) {
+        public Settings {
+            Objects.requireNonNull(cooldown); Objects.requireNonNull(duration); Objects.requireNonNull(redirectPercent);
+            if (cooldown.isNegative() || cooldown.compareTo(Duration.ofDays(365)) > 0
+                    || !Double.isFinite(range) || range <= 0 || range > 64
+                    || duration.isNegative() || duration.isZero() || duration.compareTo(Duration.ofDays(1)) > 0
+                    || redirectPercent.signum() < 0 || redirectPercent.compareTo(BigDecimal.valueOf(100)) > 0) {
+                throw new IllegalArgumentException("Invalid Guardian Bond settings");
+            }
+        }
+        public static Settings defaults() {
+            return new Settings(Duration.ofSeconds(20), 10, Duration.ofSeconds(6), BigDecimal.valueOf(30));
+        }
+    }
+
+    public record Support(UUID target, UUID supportingCharacter, EquipmentSessions.Active aided, BigDecimal amount) {
+        public Support {
+            Objects.requireNonNull(target); Objects.requireNonNull(supportingCharacter);
+            Objects.requireNonNull(aided); Objects.requireNonNull(amount);
+        }
+    }
+
+    @FunctionalInterface public interface Damage {
+        BigDecimal apply(Player guardian, Entity attacker, BigDecimal requested);
+    }
+
+    private final class State implements AutoCloseable {
+        final AbilityExecution execution;
+        final Player guardian;
+        final Player ally;
+        final EquipmentSessions.Active aided;
+        final Settings settings;
+        boolean closed;
+        State(AbilityExecution execution, Player guardian, Player ally,
+              EquipmentSessions.Active aided, Settings settings) {
+            this.execution = execution; this.guardian = guardian; this.ally = ally;
+            this.aided = aided; this.settings = settings;
+        }
+        @Override public void close() {
+            if (closed) return;
+            closed = true;
+            byGuardian.remove(guardian.getUniqueId(), this);
+            byAlly.remove(ally.getUniqueId(), this);
+        }
+    }
+
+    private static final class NativeTransfer {
+        final Player guardian; final Entity attacker; final BigDecimal requested; final BigDecimal available;
+        BigDecimal accepted = BigDecimal.ZERO;
+        NativeTransfer(Player guardian, Entity attacker, BigDecimal requested, BigDecimal available) {
+            this.guardian = guardian; this.attacker = attacker; this.requested = requested; this.available = available;
+        }
+    }
+
+    private static final ThreadLocal<Integer> REDIRECT_DEPTH = ThreadLocal.withInitial(() -> 0);
+
+    private volatile Settings settings;
+    private final EquipmentSessions sessions;
+    private final PartyRoster parties;
+    private final Damage damage;
+    private final Consumer<Support> supports;
+    private final Map<UUID, State> byGuardian = new java.util.HashMap<>();
+    private final Map<UUID, State> byAlly = new java.util.HashMap<>();
+    private int transferring;
+    private NativeTransfer nativeTransfer;
+    private org.bukkit.scheduler.BukkitTask sweepTask;
+    private boolean closed;
+
+    public GuardianBond(Settings settings, EquipmentSessions sessions, PartyRoster parties,
+                        Consumer<Support> supports) {
+        this(settings, sessions, parties, null, supports);
+    }
+
+    public GuardianBond(Settings settings, EquipmentSessions sessions, PartyRoster parties,
+                        Damage damage, Consumer<Support> supports) {
+        this.settings = Objects.requireNonNull(settings);
+        this.sessions = Objects.requireNonNull(sessions);
+        this.parties = Objects.requireNonNull(parties);
+        this.damage = damage == null ? this::nativeDamage : damage;
+        this.supports = Objects.requireNonNull(supports);
+    }
+
+    public void configure(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+
+    public void install(org.bukkit.plugin.Plugin plugin) {
+        Objects.requireNonNull(plugin);
+        if (closed || sweepTask != null) throw new IllegalStateException("Guardian Bond sweep already installed or closed");
+        sweepTask = plugin.getServer().getScheduler().runTaskTimer(plugin, this::sweep, 1, 1);
+    }
+
+    /** Bound active-link validation prevents an invalid link from becoming valid again later. */
+    public void sweep() {
+        if (closed) return;
+        int checked = 0;
+        for (var state : List.copyOf(byGuardian.values())) {
+            if (!current(state)) breakBond(state);
+            if (++checked == 256) break;
+        }
+    }
+
+    public AbilityDefinition definition() {
+        var current = settings;
+        return new AbilityDefinition("guardian_bond", "Guardian Bond", Material.IRON_CHESTPLATE,
+            List.of("Redirect " + decimal(current.redirectPercent()) + "% of an aimed party ally's combat damage.",
+                "Range " + decimal(BigDecimal.valueOf(current.range())) + " blocks for " + seconds(current.duration()) + " seconds."),
+            "Use on an aimed active party ally; one guardian and one bond per ally.",
+            Map.of(Stat.CON, BigInteger.valueOf(16), Stat.WIS, BigInteger.TEN), BigInteger.ONE,
+            AbilityDefinition.Activation.DELAYED, ControlInput.Gesture.USE, current.cooldown(),
+            Map.of("range", BigDecimal.valueOf(current.range()).stripTrailingZeros(),
+                "duration-seconds", BigDecimal.valueOf(current.duration().toNanos()).movePointLeft(9),
+                "redirect-percent", current.redirectPercent()),
+            AbilityDefinition.TargetPolicy.PARTY, this);
+    }
+
+    @Override public boolean accepts(ControlInput input) {
+        if (closed || !(input.target() instanceof Player ally) || ally == input.player()) return false;
+        return byGuardian.get(input.player().getUniqueId()) == null && byAlly.get(ally.getUniqueId()) == null
+            && eligible(input.player(), ally, settings.range()) && aided(ally) != null;
+    }
+
+    @Override public void activate(AbilityExecution execution) {
+        if (closed || !execution.stillCurrent() || !(execution.input().target() instanceof Player ally)) return;
+        var guardian = execution.input().player(); var captured = from(execution.definition()); var aided = aided(ally);
+        if (ally == guardian || aided == null || !eligible(guardian, ally, captured.range())
+                || byGuardian.containsKey(guardian.getUniqueId()) || byAlly.containsKey(ally.getUniqueId())) {
+            execution.finish(); return;
+        }
+        var state = new State(execution, guardian, ally, aided, captured);
+        byGuardian.put(guardian.getUniqueId(), state); byAlly.put(ally.getUniqueId(), state);
+        execution.own(state); execution.later(captured.duration(), execution::finish);
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void redirect(EntityDamageByEntityEvent event) {
+        if (closed || redirectedDamage() || transferring != 0 || !(event.getEntity() instanceof Player ally)) return;
+        var state = byAlly.get(ally.getUniqueId());
+        if (state == null) return;
+        if (!current(state)) { breakBond(state); return; }
+        double incoming = event.getDamage();
+        if (!Double.isFinite(incoming) || incoming <= 0) return;
+        BigDecimal requested = BigDecimal.valueOf(incoming)
+            .multiply(state.settings.redirectPercent().movePointLeft(2));
+        if (requested.signum() <= 0) return;
+        Entity attacker = attacker(event);
+        if (attacker == null) return;
+        BigDecimal accepted;
+        transferring++; REDIRECT_DEPTH.set(REDIRECT_DEPTH.get() + 1);
+        try { accepted = damage.apply(state.guardian, attacker, requested); }
+        catch (RuntimeException failure) { return; }
+        finally {
+            transferring--;
+            int depth = REDIRECT_DEPTH.get() - 1;
+            if (depth == 0) REDIRECT_DEPTH.remove(); else REDIRECT_DEPTH.set(depth);
+        }
+        if (accepted == null || accepted.signum() <= 0) return;
+        BigDecimal maximum = requested.min(BigDecimal.valueOf(incoming));
+        if (accepted.compareTo(maximum) > 0) accepted = maximum;
+        double remaining = BigDecimal.valueOf(incoming).subtract(accepted).max(BigDecimal.ZERO).doubleValue();
+        if (!Double.isFinite(remaining)) return;
+        event.setDamage(remaining);
+        state.execution.report(AbilityReport.Type.PREVENTION, ally, accepted);
+        supports.accept(new Support(attacker.getUniqueId(), state.execution.input().session().character(), state.aided, accepted));
+    }
+
+    /** Capture accepted marked damage before synchronous fantasy-defeat restoration can replace native health. */
+    private BigDecimal nativeDamage(Player guardian, Entity attacker, BigDecimal requested) {
+        Objects.requireNonNull(guardian); Objects.requireNonNull(attacker); Objects.requireNonNull(requested);
+        double amount = requested.doubleValue(); double health = effectiveHealth(guardian);
+        if (!Double.isFinite(amount) || amount <= 0 || !Double.isFinite(health) || health <= 0) return BigDecimal.ZERO;
+        var transfer = new NativeTransfer(guardian, attacker, requested, BigDecimal.valueOf(health));
+        nativeTransfer = transfer;
+        try { guardian.damage(amount, attacker); }
+        finally { nativeTransfer = null; }
+        return transfer.accepted;
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void acceptedRedirect(EntityDamageByEntityEvent event) {
+        var transfer = nativeTransfer;
+        if (transfer == null || event.getEntity() != transfer.guardian || attacker(event) != transfer.attacker
+                || event.isCancelled() || !Double.isFinite(event.getFinalDamage()) || event.getFinalDamage() <= 0) return;
+        transfer.accepted = BigDecimal.valueOf(event.getFinalDamage()).min(transfer.requested).min(transfer.available);
+    }
+
+    /** True only during synchronous dispatch of Guardian Bond's marked redirected damage. */
+    public static boolean redirectedDamage() {
+        int depth = REDIRECT_DEPTH.get();
+        if (depth == 0) REDIRECT_DEPTH.remove();
+        return depth > 0;
+    }
+
+    private EquipmentSessions.Active aided(Player ally) {
+        return sessions.active(ally.getUniqueId()).filter(sessions::current).orElse(null);
+    }
+
+    private boolean current(State state) {
+        if (state.closed || !state.execution.stillCurrent() || state.ally != state.execution.input().target()
+                || !sessions.current(state.aided)
+                || !sessions.active(state.ally.getUniqueId()).filter(state.aided::equals).isPresent()
+                || !eligible(state.guardian, state.ally, state.settings.range())) return false;
+        var guardianParty = parties.partyOf(state.guardian.getUniqueId()).orElse(null);
+        var allyParty = parties.partyOf(state.ally.getUniqueId()).orElse(null);
+        return guardianParty != null && allyParty != null && guardianParty.id().equals(allyParty.id());
+    }
+
+    private void breakBond(State state) {
+        state.close(); state.execution.finish();
+    }
+
+    private static boolean eligible(Player guardian, Player ally, double range) {
+        try {
+            var source = guardian.getLocation(); var target = ally.getLocation();
+            return source.getWorld() == target.getWorld() && source.distanceSquared(target) <= range * range
+                && guardian.hasLineOfSight(ally);
+        } catch (RuntimeException invalid) { return false; }
+    }
+
+    private static Entity attacker(EntityDamageByEntityEvent event) {
+        Entity causing = event.getDamageSource().getCausingEntity();
+        if (causing != null) return causing;
+        if (event.getDamager() instanceof Projectile projectile) {
+            ProjectileSource shooter = projectile.getShooter();
+            if (shooter instanceof Entity entity) return entity;
+        }
+        return event.getDamager();
+    }
+
+    private static double effectiveHealth(Player player) {
+        return Math.max(0, player.getHealth()) + Math.max(0, player.getAbsorptionAmount());
+    }
+    private static Settings from(AbilityDefinition definition) {
+        var parameters = definition.parameters();
+        return new Settings(definition.cooldown(), parameters.get("range").doubleValue(),
+            Duration.ofNanos(parameters.get("duration-seconds").movePointRight(9).longValueExact()),
+            parameters.get("redirect-percent"));
+    }
+    private static String decimal(BigDecimal value) { return value.stripTrailingZeros().toPlainString(); }
+    private static String seconds(Duration duration) {
+        return decimal(BigDecimal.valueOf(duration.toNanos()).movePointLeft(9));
+    }
+
+    @Override public void close() {
+        if (closed) return; closed = true;
+        if (sweepTask != null) sweepTask.cancel();
+        for (var state : List.copyOf(byGuardian.values())) state.execution.finish();
+        byGuardian.clear(); byAlly.clear();
+    }
+}

src/main/java/games/dmg/fantasystick/ability/Hex.java

@@ -0,0 +1,49 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.entity.LivingEntity;
+
+/** Hex's aimed, owned outgoing combat-damage penalty. */
+public final class Hex implements AbilityEffect,AutoCloseable{
+    public record Settings(Duration cooldown,double range,Duration duration,BigDecimal reductionPercent){
+        public Settings{Objects.requireNonNull(cooldown);Objects.requireNonNull(duration);Objects.requireNonNull(reductionPercent);
+            if(cooldown.isNegative()||cooldown.compareTo(Duration.ofDays(365))>0||!Double.isFinite(range)||range<=0||range>64
+                ||duration.isZero()||duration.isNegative()||duration.compareTo(Duration.ofDays(1))>0
+                ||reductionPercent.signum()<0||reductionPercent.compareTo(BigDecimal.valueOf(100))>0)throw new IllegalArgumentException("Invalid Hex settings");}
+        public static Settings defaults(){return new Settings(Duration.ofSeconds(10),12,Duration.ofSeconds(4),BigDecimal.valueOf(20));}}
+    private final class State implements AutoCloseable{final AbilityExecution execution;final LivingEntity target;final AutoCloseable grant;boolean closed;
+        State(AbilityExecution execution,LivingEntity target,AutoCloseable grant){this.execution=execution;this.target=target;this.grant=grant;}
+        @Override public void close(){if(closed)return;closed=true;hexes.remove(target.getUniqueId(),this);try{grant.close();}catch(Exception failure){throw new IllegalStateException(failure);}}}
+    private volatile Settings settings;private final OutgoingDamageMitigation mitigation;private final Map<UUID,State> hexes=new java.util.HashMap<>();private boolean closed;
+    public Hex(Settings settings,OutgoingDamageMitigation mitigation){this.settings=Objects.requireNonNull(settings);this.mitigation=Objects.requireNonNull(mitigation);}
+    public void configure(Settings settings){this.settings=Objects.requireNonNull(settings);}
+    public AbilityDefinition definition(){var current=settings;return new AbilityDefinition("hex","Hex",Material.SPIDER_EYE,
+        List.of("Reduce an aimed hostile's combat damage by "+current.reductionPercent().stripTrailingZeros().toPlainString()+"%.",
+            "Range "+BigDecimal.valueOf(current.range()).stripTrailingZeros().toPlainString()+" blocks; lasts "+seconds(current.duration())+" seconds."),
+        "Use while aiming at the first visible hostile; there is no fallback target.",Map.of(Stat.CHR,BigInteger.valueOf(14),Stat.WIS,BigInteger.valueOf(12)),BigInteger.ONE,
+        AbilityDefinition.Activation.DELAYED,ControlInput.Gesture.USE,current.cooldown(),Map.of("range",BigDecimal.valueOf(current.range()).stripTrailingZeros(),
+            "duration-seconds",BigDecimal.valueOf(current.duration().toNanos()).movePointLeft(9),"damage-reduction-percent",current.reductionPercent()),
+        AbilityDefinition.TargetPolicy.HOSTILE,this);}
+    @Override public boolean accepts(ControlInput input){return !closed&&input.target() instanceof LivingEntity target&&inRange(input,target,settings.range());}
+    @Override public void activate(AbilityExecution execution){if(closed||!execution.stillCurrent()||!(execution.input().target() instanceof LivingEntity target))return;
+        var current=from(execution.definition());if(!inRange(execution.input(),target,current.range())){execution.finish();return;}
+        var state=new State(execution,target,mitigation.grant(execution,target,current.reductionPercent()));var previous=hexes.put(target.getUniqueId(),state);
+        if(previous!=null)previous.execution.finish();execution.own(state);execution.later(current.duration(),execution::finish);}
+    private static boolean inRange(ControlInput input,LivingEntity target,double range){try{Location source=input.player().getLocation(),destination=target.getLocation();
+        return source.getWorld()==destination.getWorld()&&source.distanceSquared(destination)<=range*range&&input.player().hasLineOfSight(target);
+        }catch(RuntimeException invalid){return false;}}
+    private static Settings from(AbilityDefinition definition){var p=definition.parameters();return new Settings(definition.cooldown(),p.get("range").doubleValue(),
+        Duration.ofNanos(p.get("duration-seconds").movePointRight(9).longValueExact()),p.get("damage-reduction-percent"));}
+    private static String seconds(Duration value){return BigDecimal.valueOf(value.toNanos()).movePointLeft(9).stripTrailingZeros().toPlainString();}
+    @Override public void close(){if(closed)return;closed=true;for(var state:List.copyOf(hexes.values()))state.execution.finish();hexes.clear();}
+}

src/main/java/games/dmg/fantasystick/ability/Inspire.java

@@ -0,0 +1,16 @@
+package games.dmg.fantasystick.ability;
+import games.dmg.fantasystick.progression.Stat;import games.dmg.fantasystick.session.ControlInput;import java.math.*;import java.time.Duration;import java.util.*;import org.bukkit.*;import org.bukkit.entity.Player;
+/** Inspire's self-or-aimed fantasy-player temporary health grant. */
+public final class Inspire implements AbilityEffect,AutoCloseable{
+ public record Settings(BigInteger baseTemporaryHealth,Duration cooldown,double range,Duration duration){public Settings{Objects.requireNonNull(baseTemporaryHealth);Objects.requireNonNull(cooldown);Objects.requireNonNull(duration);if(baseTemporaryHealth.signum()<0||baseTemporaryHealth.compareTo(BigDecimal.valueOf(Double.MAX_VALUE).toBigInteger())>0||cooldown.isNegative()||cooldown.compareTo(Duration.ofDays(365))>0||!Double.isFinite(range)||range<=0||range>64||duration.isZero()||duration.isNegative()||duration.compareTo(Duration.ofDays(1))>0)throw new IllegalArgumentException("Invalid Inspire settings");}public static Settings defaults(){return new Settings(BigInteger.valueOf(4),Duration.ofSeconds(15),12,Duration.ofSeconds(6));}}
+ private volatile Settings settings;private final TemporaryHealth temporaryHealth;private boolean closed;
+ public Inspire(Settings settings,TemporaryHealth temporaryHealth){this.settings=Objects.requireNonNull(settings);this.temporaryHealth=Objects.requireNonNull(temporaryHealth);}public void configure(Settings settings){this.settings=Objects.requireNonNull(settings);}
+ public AbilityDefinition definition(){var s=settings;return new AbilityDefinition("inspire","Inspire",Material.AMETHYST_SHARD,List.of("Grant "+s.baseTemporaryHealth()+" + CHR modifier temporary health for "+seconds(s.duration())+" seconds.","Range "+BigDecimal.valueOf(s.range()).stripTrailingZeros().toPlainString()+" blocks for an aimed fantasy player."),"Sneak+Use selects self; normal Use requires an aimed fantasy player.",Map.of(Stat.CHR,BigInteger.valueOf(12),Stat.WIS,BigInteger.TEN),BigInteger.ONE,AbilityDefinition.Activation.DELAYED,ControlInput.Gesture.USE,s.cooldown(),Map.of("base-temporary-health",new BigDecimal(s.baseTemporaryHealth()),"range",BigDecimal.valueOf(s.range()).stripTrailingZeros(),"duration-seconds",BigDecimal.valueOf(s.duration().toNanos()).movePointLeft(9)),AbilityDefinition.TargetPolicy.ALLY,this);}
+ @Override public boolean accepts(ControlInput input){if(closed||!(input.target() instanceof Player target))return false;if(input.player().isSneaking())return target==input.player();return target!=input.player()&&inRange(input.player(),target,settings.range());}
+ public static BigInteger amount(BigInteger charisma){return amount(BigInteger.valueOf(4),charisma);}static BigInteger amount(BigInteger base,BigInteger charisma){Objects.requireNonNull(base);Objects.requireNonNull(charisma);if(base.signum()<0||charisma.signum()<0)throw new IllegalArgumentException("Invalid Inspire amount");var delta=charisma.subtract(BigInteger.TEN);var divided=delta.divideAndRemainder(BigInteger.TWO);var modifier=divided[0];if(delta.signum()<0&&divided[1].signum()!=0)modifier=modifier.subtract(BigInteger.ONE);return base.add(modifier);}
+ @Override public void activate(AbilityExecution execution){if(closed||!execution.stillCurrent()||!(execution.input().target() instanceof Player target))return;var s=from(execution.definition());if(execution.input().player().isSneaking()?target!=execution.input().player():target==execution.input().player()||!inRange(execution.input().player(),target,s.range())){execution.finish();return;}var exact=amount(s.baseTemporaryHealth(),execution.character().stats().get(Stat.CHR));double nativeAmount=exact.bitLength()>1023?Double.MAX_VALUE:exact.doubleValue();if(!Double.isFinite(nativeAmount)||nativeAmount<=0){execution.finish();return;}execution.own(temporaryHealth.grant(execution,target,nativeAmount));execution.later(s.duration(),execution::finish);}
+ private static boolean inRange(Player source,Player target,double range){try{var a=source.getLocation();var b=target.getLocation();return a.getWorld()==b.getWorld()&&a.distanceSquared(b)<=range*range&&source.hasLineOfSight(target);}catch(RuntimeException invalid){return false;}}
+ private static Settings from(AbilityDefinition d){var p=d.parameters();return new Settings(p.get("base-temporary-health").toBigIntegerExact(),d.cooldown(),p.get("range").doubleValue(),Duration.ofNanos(p.get("duration-seconds").movePointRight(9).longValueExact()));}
+ private static String seconds(Duration d){return BigDecimal.valueOf(d.toNanos()).movePointLeft(9).stripTrailingZeros().toPlainString();}
+ @Override public void close(){closed=true;}
+}

src/main/java/games/dmg/fantasystick/ability/Longbow.java

@@ -0,0 +1,220 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.math.MathContext;
+import java.time.Duration;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.damage.DamageSource;
+import org.bukkit.damage.DamageType;
+import org.bukkit.entity.AbstractArrow;
+import org.bukkit.entity.Arrow;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDamageByEntityEvent;
+import org.bukkit.event.entity.EntityDamageEvent;
+import org.bukkit.event.entity.ProjectileHitEvent;
+import org.bukkit.util.Vector;
+
+/** Longbow's ammunition-free native draw and bounded custom-arrow damage adapter. */
+public final class Longbow implements AbilityEffect, Listener, AutoCloseable {
+    private static final BigInteger MAX_NATIVE_BASE = BigDecimal.valueOf(Double.MAX_VALUE).toBigInteger();
+
+    public record Settings(BigInteger baseDamage, Duration recovery, int minimumDrawTicks, int fullDrawTicks,
+                           double range, Duration lifetime, double fullSpeedPerTick) {
+        public Settings {
+            Objects.requireNonNull(baseDamage); Objects.requireNonNull(recovery); Objects.requireNonNull(lifetime);
+            if (baseDamage.signum() < 0 || baseDamage.compareTo(MAX_NATIVE_BASE) > 0
+                    || recovery.compareTo(Duration.ofSeconds(1)) < 0
+                    || recovery.compareTo(Duration.ofDays(365)) > 0
+                    || minimumDrawTicks < 1 || minimumDrawTicks > 72_000
+                    || fullDrawTicks < minimumDrawTicks || fullDrawTicks > 72_000
+                    || !Double.isFinite(range) || range <= 0 || range > 1024
+                    || lifetime.isZero() || lifetime.isNegative() || lifetime.compareTo(Duration.ofSeconds(60)) > 0
+                    || !Double.isFinite(fullSpeedPerTick) || fullSpeedPerTick < 0.01 || fullSpeedPerTick > 64) {
+                throw new IllegalArgumentException("Invalid Longbow settings");
+            }
+        }
+        public static Settings defaults() {
+            return new Settings(BigInteger.valueOf(5), Duration.ofSeconds(1), 3, 20, 64,
+                Duration.ofSeconds(10), 3);
+        }
+    }
+
+    private final class State implements AutoCloseable {
+        final Arrow arrow;
+        final AbilityExecution execution;
+        final Location origin;
+        final Settings settings;
+        final BigDecimal damage;
+        LivingEntity target;
+        boolean accepted;
+        boolean finished;
+        State(Arrow arrow, AbilityExecution execution, Location origin, Settings settings, BigDecimal damage) {
+            this.arrow = arrow; this.execution = execution; this.origin = origin; this.settings = settings; this.damage = damage;
+        }
+        @Override public void close() {
+            if (finished) return;
+            finished = true; arrows.remove(arrow.getUniqueId(), this); arrow.remove();
+        }
+    }
+
+    private volatile Settings settings;
+    private final Map<UUID, State> arrows = new HashMap<>();
+    private State damaging;
+    private boolean closed;
+
+    public Longbow(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+    public void configure(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+
+    public AbilityDefinition definition() {
+        var current = settings;
+        return new AbilityDefinition("longbow", "Longbow", Material.BOW,
+            List.of("Draw and release an ammunition-free owned arrow.",
+                "A full draw deals " + current.baseDamage() + " + DEX modifier damage."),
+            "Draw by holding use; release after at least " + current.minimumDrawTicks() + " ticks.",
+            Map.of(Stat.DEX, BigInteger.valueOf(14)), BigInteger.ONE,
+            AbilityDefinition.Activation.PROJECTILE, ControlInput.Gesture.DRAW_RELEASE, current.recovery(),
+            Map.of("base-damage", new BigDecimal(current.baseDamage()),
+                "minimum-draw-ticks", BigDecimal.valueOf(current.minimumDrawTicks()),
+                "full-draw-ticks", BigDecimal.valueOf(current.fullDrawTicks()),
+                "range", BigDecimal.valueOf(current.range()).stripTrailingZeros(),
+                "lifetime", seconds(current.lifetime()),
+                "full-projectile-speed", BigDecimal.valueOf(current.fullSpeedPerTick()).stripTrailingZeros()),
+            AbilityDefinition.TargetPolicy.PROJECTILE_HOSTILE, this);
+    }
+
+    @Override public boolean accepts(ControlInput input) {
+        return input.gesture() == ControlInput.Gesture.DRAW_RELEASE && input.heldTicks() >= settings.minimumDrawTicks();
+    }
+
+    public static BigDecimal power(int heldTicks, int fullDrawTicks) {
+        if (heldTicks < 0 || fullDrawTicks < 1) throw new IllegalArgumentException("Invalid Longbow draw");
+        var x = BigDecimal.valueOf(heldTicks).divide(BigDecimal.valueOf(fullDrawTicks), MathContext.DECIMAL128);
+        var power = x.multiply(x, MathContext.DECIMAL128).add(x.multiply(BigDecimal.TWO), MathContext.DECIMAL128)
+            .divide(BigDecimal.valueOf(3), MathContext.DECIMAL128);
+        return power.min(BigDecimal.ONE);
+    }
+
+    public static BigInteger fullDamage(BigInteger dexterity) {
+        return fullDamage(BigInteger.valueOf(5), dexterity);
+    }
+
+    static BigInteger fullDamage(BigInteger base, BigInteger dexterity) {
+        Objects.requireNonNull(base); Objects.requireNonNull(dexterity);
+        if (base.signum() < 0 || dexterity.signum() < 0) throw new IllegalArgumentException("Invalid Longbow damage input");
+        BigInteger delta = dexterity.subtract(BigInteger.TEN);
+        BigInteger[] divided = delta.divideAndRemainder(BigInteger.TWO);
+        BigInteger modifier = divided[0];
+        if (delta.signum() < 0 && divided[1].signum() != 0) modifier = modifier.subtract(BigInteger.ONE);
+        return base.add(modifier);
+    }
+
+    @Override public void activate(AbilityExecution execution) {
+        if (closed || !execution.stillCurrent()) return;
+        Settings shot = from(execution.definition());
+        BigDecimal power = power(execution.input().heldTicks(), shot.fullDrawTicks());
+        var player = execution.input().player();
+        Location origin = player.getEyeLocation().clone();
+        Vector direction = origin.getDirection();
+        if (!Double.isFinite(direction.getX()) || !Double.isFinite(direction.getY()) || !Double.isFinite(direction.getZ())
+                || direction.lengthSquared() == 0) throw new IllegalStateException("Longbow direction is unavailable");
+        double speed = BigDecimal.valueOf(shot.fullSpeedPerTick()).multiply(power, MathContext.DECIMAL128).doubleValue();
+        var arrow = player.launchProjectile(Arrow.class, direction.normalize().multiply(speed));
+        arrow.setPickupStatus(AbstractArrow.PickupStatus.DISALLOWED);
+        arrow.setDamage(0); arrow.setKnockbackStrength(0); arrow.setPierceLevel(0); arrow.setCritical(false);
+        var damage = new BigDecimal(fullDamage(shot.baseDamage(), execution.character().stats().get(Stat.DEX)))
+            .multiply(power, MathContext.DECIMAL128);
+        var state = new State(arrow, execution, origin, shot, damage);
+        if (arrows.putIfAbsent(arrow.getUniqueId(), state) != null) {
+            arrow.remove(); throw new IllegalStateException("Duplicate Longbow arrow identity");
+        }
+        execution.own(state);
+        long rangeTicks = Math.max(1, (long) Math.ceil(shot.range() / speed));
+        execution.later(Duration.ofMillis(Math.multiplyExact(rangeTicks, 50)), () -> {
+            if (arrows.containsKey(arrow.getUniqueId())) execution.finish();
+        });
+        execution.later(shot.lifetime(), () -> {
+            if (arrows.containsKey(arrow.getUniqueId())) execution.finish();
+        });
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST)
+    public void containNativeDamage(EntityDamageByEntityEvent event) {
+        if (!(event.getDamager() instanceof Arrow arrow)) return;
+        var state = arrows.get(arrow.getUniqueId());
+        if (state != null && damaging != state) event.setCancelled(true);
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void hit(ProjectileHitEvent event) {
+        var state = arrows.remove(event.getEntity().getUniqueId());
+        if (state == null) return;
+        try {
+            if (closed || event.isCancelled() || !state.execution.stillCurrent()
+                    || !(event.getHitEntity() instanceof LivingEntity target)
+                    || !inRange(state, event.getEntity().getLocation())
+                    || state.execution.eligible(List.of(target), 1).isEmpty()) return;
+            double nativeDamage = state.damage.compareTo(BigDecimal.valueOf(Double.MAX_VALUE)) > 0
+                ? Double.MAX_VALUE : state.damage.doubleValue();
+            if (!Double.isFinite(nativeDamage) || nativeDamage <= 0) return;
+            var source = DamageSource.builder(DamageType.ARROW).withCausingEntity(state.execution.input().player())
+                .withDirectEntity(state.arrow).withDamageLocation(state.arrow.getLocation()).build();
+            state.target = target; damaging = state;
+            try { target.damage(nativeDamage, source); }
+            finally { if (damaging == state) damaging = null; }
+        } finally {
+            state.close(); state.execution.finish();
+        }
+    }
+
+    private static boolean inRange(State state, Location current) {
+        return current.getWorld() != null && state.origin.getWorld() != null
+            && current.getWorld().equals(state.origin.getWorld())
+            && current.distanceSquared(state.origin) <= state.settings.range() * state.settings.range();
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void acceptedDamage(EntityDamageEvent event) {
+        var state = damaging;
+        if (state == null || state.accepted || event.getEntity() != state.target || event.getFinalDamage() <= 0
+                || !Double.isFinite(event.getFinalDamage())) return;
+        var direct = event.getDamageSource().getDirectEntity();
+        if (direct != state.arrow && (!(event instanceof EntityDamageByEntityEvent byEntity)
+                || byEntity.getDamager() != state.arrow)) return;
+        state.accepted = true;
+        state.execution.report(AbilityReport.Type.DAMAGE, event.getEntity(), BigDecimal.valueOf(event.getFinalDamage()));
+    }
+
+    private static Settings from(AbilityDefinition definition) {
+        var p = definition.parameters();
+        return new Settings(p.get("base-damage").toBigIntegerExact(), definition.cooldown(),
+            p.get("minimum-draw-ticks").intValueExact(), p.get("full-draw-ticks").intValueExact(),
+            p.get("range").doubleValue(), duration(p.get("lifetime")),
+            p.get("full-projectile-speed").doubleValue());
+    }
+
+    private static Duration duration(BigDecimal seconds) {
+        return Duration.ofNanos(seconds.movePointRight(9).toBigIntegerExact().longValueExact());
+    }
+    private static BigDecimal seconds(Duration duration) {
+        return BigDecimal.valueOf(duration.getSeconds()).add(BigDecimal.valueOf(duration.getNano(), 9)).stripTrailingZeros();
+    }
+
+    @Override public void close() {
+        if (closed) return;
+        closed = true;
+        for (var state : List.copyOf(arrows.values())) state.execution.finish();
+        arrows.clear(); damaging = null;
+    }
+}

src/main/java/games/dmg/fantasystick/ability/MendingLight.java

@@ -0,0 +1,183 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.party.PartyRoster;
+import games.dmg.fantasystick.persistence.CharacterRecord;
+import games.dmg.fantasystick.persistence.CharacterStorage;
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+import org.bukkit.Material;
+import org.bukkit.attribute.Attribute;
+import org.bukkit.entity.Player;
+import org.bukkit.event.entity.EntityRegainHealthEvent;
+
+/** Mending Light's aimed party healing with persist-before-publication support evidence. */
+public final class MendingLight implements AbilityEffect {
+    public record Settings(BigInteger baseHealing, Duration cooldown, double range) {
+        public Settings {
+            Objects.requireNonNull(baseHealing); Objects.requireNonNull(cooldown);
+            if (baseHealing.signum() < 0
+                    || baseHealing.compareTo(BigDecimal.valueOf(Double.MAX_VALUE).toBigInteger()) > 0
+                    || cooldown.isNegative() || cooldown.compareTo(Duration.ofDays(365)) > 0
+                    || !Double.isFinite(range) || range <= 0 || range > 64) {
+                throw new IllegalArgumentException("Invalid Mending Light settings");
+            }
+        }
+        public static Settings defaults() { return new Settings(BigInteger.valueOf(6), Duration.ofSeconds(8), 12); }
+    }
+
+    public record Support(UUID supportingCharacter, EquipmentSessions.Active aided, BigDecimal amount) {
+        public Support {
+            Objects.requireNonNull(supportingCharacter); Objects.requireNonNull(aided); Objects.requireNonNull(amount);
+            if (amount.signum() <= 0) throw new IllegalArgumentException("Support amount must be positive");
+        }
+    }
+
+    private record Target(Player player, EquipmentSessions.Active active, CharacterRecord record) { }
+
+    private final CharacterStorage characters;
+    private final EquipmentSessions sessions;
+    private final PartyRoster parties;
+    private final Consumer<Runnable> nextTick;
+    private final Consumer<EntityRegainHealthEvent> healingEvents;
+    private final Supplier<BigDecimal> nativeLimit;
+    private final Consumer<Support> supports;
+    private volatile Settings settings;
+
+    public MendingLight(Settings settings, CharacterStorage characters, EquipmentSessions sessions, PartyRoster parties,
+                        Consumer<Runnable> nextTick, Consumer<EntityRegainHealthEvent> healingEvents,
+                        Supplier<BigDecimal> nativeLimit, Consumer<Support> supports) {
+        this.settings = Objects.requireNonNull(settings); this.characters = Objects.requireNonNull(characters);
+        this.sessions = Objects.requireNonNull(sessions); this.parties = Objects.requireNonNull(parties);
+        this.nextTick = Objects.requireNonNull(nextTick); this.healingEvents = Objects.requireNonNull(healingEvents);
+        this.nativeLimit = Objects.requireNonNull(nativeLimit); this.supports = Objects.requireNonNull(supports);
+    }
+
+    public void configure(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+
+    public AbilityDefinition definition() {
+        var current = settings;
+        return new AbilityDefinition("mending_light", "Mending Light", Material.GHAST_TEAR,
+            List.of("Restore a party ally's missing fantasy health.",
+                "Heals " + current.baseHealing() + " + WIS modifier within " + decimal(current.range()) + " blocks."),
+            "Use while aiming at an injured active party ally; self and full-health targets are refused.",
+            Map.of(Stat.WIS, BigInteger.valueOf(12), Stat.CHR, BigInteger.TEN), BigInteger.ONE,
+            AbilityDefinition.Activation.DELAYED, ControlInput.Gesture.USE, current.cooldown(),
+            Map.of("base-healing", new BigDecimal(current.baseHealing()),
+                "range", BigDecimal.valueOf(current.range()).stripTrailingZeros()),
+            AbilityDefinition.TargetPolicy.PARTY, this);
+    }
+
+    @Override public boolean accepts(ControlInput input) {
+        var target = target(input, settings.range());
+        if (target == null) return false;
+        var attribute = target.player().getAttribute(Attribute.MAX_HEALTH);
+        double health = target.player().getHealth();
+        return attribute != null && Double.isFinite(health) && health >= 0
+            && Double.isFinite(attribute.getValue()) && health < attribute.getValue();
+    }
+
+    public static BigInteger healing(BigInteger wisdom) { return healing(BigInteger.valueOf(6), wisdom); }
+
+    static BigInteger healing(BigInteger base, BigInteger wisdom) {
+        Objects.requireNonNull(base); Objects.requireNonNull(wisdom);
+        if (base.signum() < 0 || wisdom.signum() < 0) throw new IllegalArgumentException("Invalid Mending Light healing input");
+        BigInteger delta = wisdom.subtract(BigInteger.TEN); BigInteger[] divided = delta.divideAndRemainder(BigInteger.TWO);
+        BigInteger modifier = divided[0];
+        if (delta.signum() < 0 && divided[1].signum() != 0) modifier = modifier.subtract(BigInteger.ONE);
+        return base.add(modifier);
+    }
+
+    @Override public void activate(AbilityExecution execution) {
+        if (!execution.stillCurrent()) return;
+        var configured = from(execution.definition());
+        var target = target(execution.input(), configured.range());
+        if (target == null) { execution.finish(); return; }
+        var attribute = target.player().getAttribute(Attribute.MAX_HEALTH);
+        if (attribute == null) { execution.finish(); return; }
+        double current = target.player().getHealth(); double maximum = attribute.getValue(); double missing = maximum - current;
+        if (!Double.isFinite(current) || !Double.isFinite(maximum) || missing <= 0) { execution.finish(); return; }
+        BigInteger exact = healing(configured.baseHealing(), execution.character().stats().get(Stat.WIS));
+        double proposed = exact.bitLength() > 1023 ? missing : Math.min(missing, exact.doubleValue());
+        if (!Double.isFinite(proposed) || proposed <= 0) { execution.finish(); return; }
+        var event = new EntityRegainHealthEvent(target.player(), proposed, EntityRegainHealthEvent.RegainReason.CUSTOM);
+        healingEvents.accept(event);
+        double accepted = Math.min(proposed, Math.min(missing, event.getAmount()));
+        if (event.isCancelled() || !Double.isFinite(accepted) || accepted <= 0) { execution.finish(); return; }
+        var expected = target.record().revision();
+        BigDecimal persistedHealth = BigDecimal.valueOf(current + accepted);
+        BigDecimal limit = nativeLimit.get();
+        characters.saveHealth(target.record().id(), expected, persistedHealth, limit).whenComplete((saved, failure) -> {
+            try {
+                nextTick.accept(() -> complete(execution, target, expected, accepted, saved, failure));
+            } catch (RuntimeException rejected) { execution.finish(); }
+        });
+    }
+
+    private void complete(AbilityExecution execution, Target target, BigInteger expected, double accepted,
+                          java.util.Optional<CharacterRecord> saved, Throwable failure) {
+        try {
+            if (failure != null || saved == null || saved.isEmpty()) {
+                execution.input().player().sendMessage("Mending Light health could not be saved; no healing was applied.");
+                return;
+            }
+            if (!execution.stillCurrent() || !current(execution.input().player(), target, from(execution.definition()).range())) return;
+            var persisted = saved.orElseThrow();
+            if (!sessions.acknowledgeProgress(target.active(), expected, persisted)) return;
+            var attribute = target.player().getAttribute(Attribute.MAX_HEALTH);
+            if (attribute == null) return;
+            double current = target.player().getHealth(); double maximum = attribute.getValue();
+            double desired = Math.min(maximum, persisted.health().doubleValue());
+            double restored = Math.min(accepted, desired - current);
+            if (!Double.isFinite(current) || !Double.isFinite(maximum) || !Double.isFinite(restored) || restored <= 0) return;
+            target.player().setHealth(Math.min(maximum, current + restored));
+            var amount = BigDecimal.valueOf(restored).stripTrailingZeros();
+            supports.accept(new Support(execution.input().session().character(), target.active(), amount));
+            execution.input().player().sendMessage("Mending Light restored " + amount.toPlainString() + " health.");
+            target.player().sendMessage("Mending Light restored " + amount.toPlainString() + " health.");
+        } finally { execution.finish(); }
+    }
+
+    private Target target(ControlInput input, double range) {
+        if (!(input.target() instanceof Player player) || player == input.player() || !inRange(input.player(), player, range)
+                || !sameParty(input.player(), player)) return null;
+        var active = sessions.active(player.getUniqueId()).filter(sessions::current).orElse(null);
+        var record = active == null ? null : sessions.currentRecord(active).orElse(null);
+        return record == null ? null : new Target(player, active, record);
+    }
+
+    private boolean current(Player source, Target target, double range) {
+        return sessions.current(target.active())
+            && sessions.currentRecord(target.active()).filter(record -> record.id().equals(target.record().id())).isPresent()
+            && inRange(source, target.player(), range) && sameParty(source, target.player());
+    }
+
+    private boolean sameParty(Player source, Player target) {
+        var party = parties.partyOf(source.getUniqueId()).orElse(null);
+        return party != null && party.members().contains(target.getUniqueId());
+    }
+
+    private static boolean inRange(Player source, Player target, double range) {
+        try {
+            var from = source.getLocation(); var to = target.getLocation();
+            return from.getWorld() == to.getWorld() && from.distanceSquared(to) <= range * range && source.hasLineOfSight(target);
+        } catch (RuntimeException invalid) { return false; }
+    }
+
+    private static Settings from(AbilityDefinition definition) {
+        var parameters = definition.parameters();
+        return new Settings(parameters.get("base-healing").toBigIntegerExact(), definition.cooldown(),
+            parameters.get("range").doubleValue());
+    }
+
+    private static String decimal(double value) { return BigDecimal.valueOf(value).stripTrailingZeros().toPlainString(); }
+}

src/main/java/games/dmg/fantasystick/ability/Meteor.java

@@ -0,0 +1,79 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.party.PartyRoster;
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.*;
+import org.bukkit.*;
+import org.bukkit.block.Block;
+import org.bukkit.block.BlockFace;
+import org.bukkit.damage.DamageSource;
+import org.bukkit.damage.DamageType;
+import org.bukkit.entity.*;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDamageEvent;
+
+/** Bounded solid-top Meteor warning followed by one direct, terrain-safe cylinder impact. */
+public final class Meteor implements AbilityEffect, Listener, AutoCloseable {
+    public record Settings(BigInteger baseDamage, Duration cooldown, double targetRange, Duration warning,
+                           double radius, double verticalRange) {
+        public Settings {
+            Objects.requireNonNull(baseDamage);Objects.requireNonNull(cooldown);Objects.requireNonNull(warning);
+            long warningTicks;
+            try { warningTicks=Math.max(1,(warning.toNanos()+49_999_999L)/50_000_000L); }
+            catch(ArithmeticException invalid){throw new IllegalArgumentException("Invalid Meteor warning",invalid);}
+            if(baseDamage.signum()<0||cooldown.isNegative()||cooldown.compareTo(Duration.ofDays(365))>0
+                    ||!Double.isFinite(targetRange)||targetRange<=0||targetRange>64
+                    ||warning.isZero()||warning.isNegative()||warningTicks>63
+                    ||!Double.isFinite(radius)||radius<=0||radius>64
+                    ||!Double.isFinite(verticalRange)||verticalRange<0||verticalRange>64)
+                throw new IllegalArgumentException("Invalid Meteor settings");
+        }
+        public static Settings defaults(){return new Settings(BigInteger.valueOf(14),Duration.ofSeconds(45),24,
+            Duration.ofSeconds(2),5,4);}
+    }
+    private record Ground(Block block,Location origin){ }
+    private static final class Attempt {final AbilityExecution execution;final LivingEntity target;boolean accepted;Attempt(AbilityExecution e,LivingEntity t){execution=e;target=t;}}
+    private final class Warning implements AutoCloseable {
+        final AbilityExecution execution;final Player source;final Ground ground;final Settings captured;final BigInteger intelligence;
+        final int maximumTicks;int elapsed;boolean impacted;boolean closed;
+        Warning(AbilityExecution execution,Ground ground,Settings captured){this.execution=execution;source=execution.input().player();this.ground=ground;this.captured=captured;intelligence=execution.character().stats().get(Stat.INT);maximumTicks=(int)Math.max(1,(captured.warning().toNanos()+49_999_999L)/50_000_000L);}
+        void start(){warnings.put(execution,this);execution.own(this);warningVisual();execution.later(Duration.ofMillis(50),this::step);}
+        void step(){if(closed||impacted)return;if(!execution.stillCurrent()){execution.finish();return;}elapsed++;if(elapsed>=maximumTicks){impact();execution.finish();return;}warningVisual();execution.later(Duration.ofMillis(50),this::step);}
+        void impact(){if(closed||impacted)return;impacted=true;if(!groundCurrent()||!execution.stillCurrent())return;impactVisual();double amount=finite(damage(captured.baseDamage(),intelligence));int affected=0;for(var target:candidates(ground.origin(),captured.radius(),captured.verticalRange())){if(affected==64||!execution.stillCurrent())break;if(!eligible(execution,target,ground.origin(),captured.radius(),captured.verticalRange()))continue;var sourceDamage=DamageSource.builder(DamageType.MAGIC).withCausingEntity(source).withDirectEntity(source).withDamageLocation(ground.origin()).build();var attempt=new Attempt(execution,target);damaging=attempt;try{target.damage(amount,sourceDamage);}finally{if(damaging==attempt)damaging=null;}affected++;}}
+        boolean groundCurrent(){try{return ground.origin().getWorld()!=null&&ground.block().getWorld()==ground.origin().getWorld()&&ground.block().getType().isSolid();}catch(RuntimeException invalid){return false;}}
+        void warningVisual(){try{var dust=new Particle.DustOptions(Color.fromRGB(255,90,20),1.6f);ground.origin().getWorld().spawnParticle(Particle.DUST,ground.origin().clone().add(0,.15,0),24,captured.radius()/2,.05,captured.radius()/2,0,dust);}catch(RuntimeException ignored){}}
+        void impactVisual(){try{var world=ground.origin().getWorld();world.spawnParticle(Particle.EXPLOSION_EMITTER,ground.origin(),2,0,0,0,0);world.spawnParticle(Particle.FLAME,ground.origin(),48,captured.radius()/2,1,captured.radius()/2,.04);world.playSound(ground.origin(),Sound.ENTITY_GENERIC_EXPLODE,1f,.7f);}catch(RuntimeException ignored){}}
+        @Override public void close(){if(closed)return;closed=true;warnings.remove(execution,this);}
+    }
+
+    private volatile Settings settings;private final EquipmentSessions sessions;private final PartyRoster parties;
+    private final Map<AbilityExecution,Warning> warnings=new IdentityHashMap<>();private Attempt damaging;private boolean closed;
+    public Meteor(Settings settings,EquipmentSessions sessions,PartyRoster parties){this.settings=Objects.requireNonNull(settings);this.sessions=Objects.requireNonNull(sessions);this.parties=Objects.requireNonNull(parties);}
+    public void configure(Settings settings){this.settings=Objects.requireNonNull(settings);}
+    public AbilityDefinition definition(){var current=settings;return new AbilityDefinition("meteor","Meteor",Material.FIRE_CHARGE,
+        List.of("Mark visible ground within "+decimal(current.targetRange())+" blocks for a "+seconds(current.warning())+"-second warning.","Impact exposed enemies in a "+decimal(current.radius())+"-block area for "+current.baseDamage()+" + INT modifier damage."),
+        "Use while looking at a solid top surface; the warning is visible and the impact never changes terrain.",Map.of(Stat.INT,BigInteger.valueOf(26),Stat.WIS,BigInteger.valueOf(20),Stat.CON,BigInteger.valueOf(12)),BigInteger.ONE,
+        AbilityDefinition.Activation.DELAYED,ControlInput.Gesture.USE,current.cooldown(),Map.of("base-damage",new BigDecimal(current.baseDamage()),"target-range",BigDecimal.valueOf(current.targetRange()).stripTrailingZeros(),"warning-seconds",nanos(current.warning()),"radius",BigDecimal.valueOf(current.radius()).stripTrailingZeros(),"vertical-range",BigDecimal.valueOf(current.verticalRange()).stripTrailingZeros()),AbilityDefinition.TargetPolicy.AREA,this);}
+    public static BigInteger damage(BigInteger intelligence){return damage(BigInteger.valueOf(14),intelligence);}
+    static BigInteger damage(BigInteger base,BigInteger intelligence){Objects.requireNonNull(base);Objects.requireNonNull(intelligence);if(base.signum()<0||intelligence.signum()<0)throw new IllegalArgumentException("Invalid Meteor damage input");var delta=intelligence.subtract(BigInteger.TEN);var divided=delta.divideAndRemainder(BigInteger.TWO);var modifier=divided[0];if(delta.signum()<0&&divided[1].signum()!=0)modifier=modifier.subtract(BigInteger.ONE);return base.add(modifier);}
+    @Override public boolean accepts(ControlInput input){return !closed&&input.target()==null&&ground(input.player(),settings.targetRange())!=null;}
+    @Override public void activate(AbilityExecution execution){if(closed||!execution.stillCurrent())return;var captured=from(execution.definition());var target=ground(execution.input().player(),captured.targetRange());if(target==null){execution.finish();return;}new Warning(execution,target,captured).start();}
+    private static Ground ground(Player player,double range){try{var eye=player.getEyeLocation();var hit=player.getWorld().rayTraceBlocks(eye,eye.getDirection(),range,FluidCollisionMode.NEVER,true);if(hit==null||hit.getHitBlock()==null||hit.getHitBlockFace()!=BlockFace.UP||!hit.getHitBlock().getType().isSolid())return null;var block=hit.getHitBlock();return new Ground(block,block.getLocation().add(.5,1,.5));}catch(RuntimeException invalid){return null;}}
+    private List<LivingEntity> candidates(Location origin,double radius,double vertical){List<Entity> nearby;try{nearby=new ArrayList<>(origin.getWorld().getNearbyEntities(origin,radius,vertical,radius));}catch(RuntimeException unavailable){return List.of();}var unique=new LinkedHashMap<UUID,LivingEntity>();int inspected=0;for(var entity:nearby){if(++inspected>256)break;if(entity instanceof LivingEntity living)unique.putIfAbsent(living.getUniqueId(),living);}var result=new ArrayList<>(unique.values());result.sort(Comparator.comparingDouble((LivingEntity target)->distance(origin,target)).thenComparing(LivingEntity::getUniqueId));return result;}
+    private boolean eligible(AbilityExecution execution,LivingEntity target,Location origin,double radius,double vertical){var source=execution.input().player();if(target==source||!inside(origin,target,radius,vertical)||!unobstructed(origin,target))return false;if(!(target instanceof Player player))return true;var active=sessions.active(player.getUniqueId()).filter(sessions::current).orElse(null);if(active==null)return false;var sourceParty=parties.partyOf(source.getUniqueId()).orElse(null);var targetParty=parties.partyOf(player.getUniqueId()).orElse(null);return sourceParty==null||targetParty==null||!sourceParty.id().equals(targetParty.id());}
+    @EventHandler(priority=EventPriority.MONITOR,ignoreCancelled=true)public void acceptedDamage(EntityDamageEvent event){var attempt=damaging;if(attempt==null||attempt.accepted||event.isCancelled()||event.getEntity()!=attempt.target||event.getCause()!=EntityDamageEvent.DamageCause.MAGIC||event.getFinalDamage()<=0||!Double.isFinite(event.getFinalDamage()))return;attempt.accepted=true;attempt.execution.report(AbilityReport.Type.DAMAGE,attempt.target,BigDecimal.valueOf(event.getFinalDamage()));}
+    private static boolean inside(Location origin,LivingEntity target,double radius,double vertical){try{var at=target.getLocation();if(origin.getWorld()!=at.getWorld())return false;double dx=at.getX()-origin.getX(),dz=at.getZ()-origin.getZ();return dx*dx+dz*dz<=radius*radius&&Math.abs(at.getY()-origin.getY())<=vertical;}catch(RuntimeException invalid){return false;}}
+    private static boolean unobstructed(Location origin,LivingEntity target){try{var world=origin.getWorld();var at=target.getLocation();if(world==null||at.getWorld()!=world)return false;var bounds=target.getBoundingBox();var center=bounds==null?at.toVector().add(new org.bukkit.util.Vector(0,target.getHeight()/2,0)):bounds.getCenter();var offset=center.subtract(origin.toVector());double distance=offset.length();if(!Double.isFinite(distance)||distance==0)return distance==0;return world.rayTraceBlocks(origin,offset.multiply(1/distance),distance,FluidCollisionMode.NEVER,true)==null;}catch(RuntimeException invalid){return false;}}
+    private static double distance(Location origin,LivingEntity target){try{var at=target.getLocation();if(origin.getWorld()!=at.getWorld())return Double.POSITIVE_INFINITY;double dx=at.getX()-origin.getX(),dz=at.getZ()-origin.getZ();return dx*dx+dz*dz;}catch(RuntimeException invalid){return Double.POSITIVE_INFINITY;}}
+    private static double finite(BigInteger value){return value.bitLength()>1023?Double.MAX_VALUE:value.doubleValue();}
+    private static Settings from(AbilityDefinition definition){var p=definition.parameters();return new Settings(p.get("base-damage").toBigIntegerExact(),definition.cooldown(),p.get("target-range").doubleValue(),Duration.ofNanos(p.get("warning-seconds").movePointRight(9).longValueExact()),p.get("radius").doubleValue(),p.get("vertical-range").doubleValue());}
+    private static BigDecimal nanos(Duration value){return BigDecimal.valueOf(value.toNanos()).movePointLeft(9);}private static String seconds(Duration value){return decimal(nanos(value));}private static String decimal(double value){return decimal(BigDecimal.valueOf(value));}private static String decimal(BigDecimal value){return value.stripTrailingZeros().toPlainString();}
+    @Override public void close(){if(closed)return;closed=true;damaging=null;for(var warning:List.copyOf(warnings.values())){warning.close();warning.execution.finish();}warnings.clear();}
+}

src/main/java/games/dmg/fantasystick/ability/OutgoingDamageBonus.java

@@ -0,0 +1,114 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.party.PartyRoster;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.IdentityHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.function.BooleanSupplier;
+import java.util.function.Consumer;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.Player;
+import org.bukkit.entity.Projectile;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDamageByEntityEvent;
+import org.bukkit.event.entity.EntityDamageEvent;
+import org.bukkit.projectiles.ProjectileSource;
+
+/** Strongest deterministic Fantasy Stick outgoing combat bonus stage. */
+public final class OutgoingDamageBonus implements Listener, AutoCloseable {
+    public record Support(UUID target, UUID supportingCharacter, EquipmentSessions.Active aided, BigDecimal amount) { }
+    private final class Grant implements AutoCloseable {
+        final long sequence; final AbilityExecution execution; final Player recipient;
+        final BigDecimal percent; final BooleanSupplier current; boolean closed;
+        Grant(AbilityExecution execution, Player recipient, BigDecimal percent, BooleanSupplier current) {
+            sequence = ++sequences; this.execution = execution; this.recipient = recipient;
+            this.percent = percent; this.current = current;
+        }
+        boolean valid() {
+            try { return !closed && execution.stillCurrent() && current.getAsBoolean(); }
+            catch (RuntimeException invalid) { return false; }
+        }
+        @Override public void close() {
+            if (closed) return; closed = true;
+            var owned = grants.get(recipient.getUniqueId());
+            if (owned != null) { owned.remove(this); if (owned.isEmpty()) grants.remove(recipient.getUniqueId()); }
+        }
+    }
+    private record Used(Grant grant, Entity target, BigDecimal amount) { }
+
+    private final EquipmentSessions sessions;
+    private final PartyRoster parties;
+    private final Consumer<Support> supports;
+    private final Map<UUID, List<Grant>> grants = new java.util.HashMap<>();
+    private final Map<EntityDamageEvent, Used> pending = new IdentityHashMap<>();
+    private long sequences;
+    private boolean closed;
+
+    public OutgoingDamageBonus(EquipmentSessions sessions, PartyRoster parties, Consumer<Support> supports) {
+        this.sessions = Objects.requireNonNull(sessions); this.parties = Objects.requireNonNull(parties);
+        this.supports = Objects.requireNonNull(supports);
+    }
+
+    public AutoCloseable grant(AbilityExecution execution, Player recipient, BigDecimal percent, BooleanSupplier current) {
+        Objects.requireNonNull(execution); Objects.requireNonNull(recipient);
+        Objects.requireNonNull(percent); Objects.requireNonNull(current);
+        if (closed || percent.signum() < 0 || percent.compareTo(BigDecimal.valueOf(1000)) > 0) {
+            throw new IllegalArgumentException("Invalid outgoing damage bonus");
+        }
+        var grant = new Grant(execution, recipient, percent, current);
+        grants.computeIfAbsent(recipient.getUniqueId(), ignored -> new ArrayList<>()).add(grant); return grant;
+    }
+
+    @EventHandler(priority = EventPriority.NORMAL, ignoreCancelled = true)
+    public void increase(EntityDamageByEntityEvent event) {
+        if (closed || GuardianBond.redirectedDamage()) return;
+        Entity attacker = attacker(event); if (!(attacker instanceof Player player)) return;
+        var owned = grants.get(player.getUniqueId()); if (owned == null) return;
+        Grant strongest = null;
+        for (var grant : List.copyOf(owned)) {
+            if (grant.recipient != player || !grant.valid()) continue;
+            if (strongest == null || grant.percent.compareTo(strongest.percent) > 0
+                    || grant.percent.compareTo(strongest.percent) == 0 && grant.sequence < strongest.sequence) strongest = grant;
+        }
+        double original = event.getDamage();
+        if (strongest == null || !Double.isFinite(original) || original <= 0) return;
+        BigDecimal added = BigDecimal.valueOf(original).multiply(strongest.percent.movePointLeft(2));
+        double increased = BigDecimal.valueOf(original).add(added).doubleValue();
+        if (!Double.isFinite(increased) || increased < 0 || added.signum() <= 0) return;
+        event.setDamage(increased); pending.put(event, new Used(strongest, event.getEntity(), added));
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void accepted(EntityDamageEvent event) {
+        var used = pending.remove(event);
+        if (used == null || event.isCancelled() || event.getFinalDamage() <= 0 || !used.grant.valid()) return;
+        used.grant.execution.report(AbilityReport.Type.BOOST_USED, used.target, used.amount);
+        var aided = sessions.active(used.grant.recipient.getUniqueId()).filter(sessions::current).orElse(null);
+        if (aided == null || aided.character().equals(used.grant.execution.input().session().character())) return;
+        var sourceParty = parties.partyOf(used.grant.execution.input().player().getUniqueId()).orElse(null);
+        var aidedParty = parties.partyOf(used.grant.recipient.getUniqueId()).orElse(null);
+        if (sourceParty == null || aidedParty == null || !sourceParty.id().equals(aidedParty.id())) return;
+        supports.accept(new Support(used.target.getUniqueId(), used.grant.execution.input().session().character(), aided, used.amount));
+    }
+
+    private static Entity attacker(EntityDamageByEntityEvent event) {
+        Entity causing = event.getDamageSource().getCausingEntity(); if (causing != null) return causing;
+        if (event.getDamager() instanceof Projectile projectile) {
+            ProjectileSource shooter = projectile.getShooter(); if (shooter instanceof Entity entity) return entity;
+        }
+        return event.getDamager();
+    }
+
+    @Override public void close() {
+        if (closed) return; closed = true;
+        for (var owned : List.copyOf(grants.values())) for (var grant : List.copyOf(owned)) grant.close();
+        grants.clear(); pending.clear();
+    }
+}

src/main/java/games/dmg/fantasystick/ability/OutgoingDamageMitigation.java

@@ -0,0 +1,78 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.party.PartyRoster;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.IdentityHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.function.Consumer;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Player;
+import org.bukkit.entity.Projectile;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDamageByEntityEvent;
+import org.bukkit.event.entity.EntityDamageEvent;
+import org.bukkit.projectiles.ProjectileSource;
+
+/** Internal pre-recipient strongest outgoing-damage reduction stage. */
+public final class OutgoingDamageMitigation implements Listener, AutoCloseable {
+    public record Support(UUID target, UUID supportingCharacter, EquipmentSessions.Active aided, BigDecimal amount) { }
+    private final class Grant implements AutoCloseable {
+        final long sequence; final AbilityExecution execution; final LivingEntity target; final BigDecimal percent; boolean closed;
+        Grant(AbilityExecution execution, LivingEntity target, BigDecimal percent) {
+            this.sequence=++sequences;this.execution=execution;this.target=target;this.percent=percent;
+        }
+        @Override public void close(){if(closed)return;closed=true;var owned=grants.get(target.getUniqueId());
+            if(owned!=null){owned.remove(this);if(owned.isEmpty())grants.remove(target.getUniqueId());}}
+    }
+    private record Prevention(Grant grant, Entity recipient, BigDecimal amount) { }
+    private final EquipmentSessions sessions; private final PartyRoster parties; private final Consumer<Support> supports;
+    private final Map<UUID,List<Grant>> grants=new java.util.HashMap<>();
+    private final Map<EntityDamageEvent,Prevention> pending=new IdentityHashMap<>();
+    private long sequences; private boolean closed;
+    public OutgoingDamageMitigation(EquipmentSessions sessions,PartyRoster parties,Consumer<Support> supports){
+        this.sessions=Objects.requireNonNull(sessions);this.parties=Objects.requireNonNull(parties);this.supports=Objects.requireNonNull(supports);}
+    public AutoCloseable grant(AbilityExecution execution,LivingEntity target,BigDecimal percent){
+        Objects.requireNonNull(execution);Objects.requireNonNull(target);Objects.requireNonNull(percent);
+        if(closed||percent.signum()<0||percent.compareTo(BigDecimal.valueOf(100))>0)throw new IllegalArgumentException("Invalid outgoing mitigation grant");
+        var grant=new Grant(execution,target,percent);grants.computeIfAbsent(target.getUniqueId(),ignored->new ArrayList<>()).add(grant);return grant;}
+
+    @EventHandler(priority=EventPriority.NORMAL,ignoreCancelled=true)
+    public void reduce(EntityDamageByEntityEvent event){
+        if(closed||GuardianBond.redirectedDamage())return;Entity attacker=attacker(event);if(attacker==null)return;var owned=grants.get(attacker.getUniqueId());if(owned==null)return;
+        Grant strongest=null;for(var grant:List.copyOf(owned)){if(grant.closed||grant.target!=attacker||!grant.execution.stillCurrent())continue;
+            if(strongest==null||grant.percent.compareTo(strongest.percent)>0
+                    ||grant.percent.compareTo(strongest.percent)==0&&grant.sequence>strongest.sequence)strongest=grant;}
+        double original=event.getDamage();if(strongest==null||!Double.isFinite(original)||original<=0)return;
+        double reduced=BigDecimal.valueOf(original).multiply(BigDecimal.ONE.subtract(strongest.percent.movePointLeft(2))).doubleValue();
+        if(!Double.isFinite(reduced)||reduced<0)return;event.setDamage(reduced);var prevented=BigDecimal.valueOf(original-reduced);
+        if(prevented.signum()>0)pending.put(event,new Prevention(strongest,event.getEntity(),prevented));
+    }
+
+    @EventHandler(priority=EventPriority.MONITOR)
+    public void accepted(EntityDamageEvent event){
+        var prevention=pending.remove(event);if(prevention==null||event.isCancelled()||!prevention.grant.execution.stillCurrent())return;
+        prevention.grant.execution.report(AbilityReport.Type.PREVENTION,prevention.grant.target,prevention.amount);
+        if(!(prevention.recipient instanceof Player player))return;
+        var aided=sessions.active(player.getUniqueId()).orElse(null);if(aided==null||!sessions.current(aided))return;
+        var input=prevention.grant.execution.input();if(aided.character().equals(input.session().character()))return;
+        var sourceParty=parties.partyOf(input.player().getUniqueId()).orElse(null);
+        var aidedParty=parties.partyOf(player.getUniqueId()).orElse(null);
+        if(sourceParty==null||aidedParty==null||!sourceParty.id().equals(aidedParty.id()))return;
+        supports.accept(new Support(prevention.grant.target.getUniqueId(),input.session().character(),aided,prevention.amount));
+    }
+
+    private static Entity attacker(EntityDamageByEntityEvent event){
+        Entity causing=event.getDamageSource().getCausingEntity();if(causing!=null)return causing;
+        if(event.getDamager() instanceof Projectile projectile){ProjectileSource shooter=projectile.getShooter();if(shooter instanceof Entity entity)return entity;}
+        return event.getDamager();
+    }
+    @Override public void close(){if(closed)return;closed=true;for(var owned:List.copyOf(grants.values()))for(var grant:List.copyOf(owned))grant.close();grants.clear();pending.clear();}
+}

src/main/java/games/dmg/fantasystick/ability/Purify.java

@@ -0,0 +1,128 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.party.PartyRoster;
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.function.Consumer;
+import org.bukkit.Material;
+import org.bukkit.entity.Player;
+import org.bukkit.potion.PotionEffectType;
+
+/** Purify's self-or-aimed-party native harmful-effect removal. */
+public final class Purify implements AbilityEffect {
+    public record Settings(Duration cooldown, double range) {
+        public Settings {
+            Objects.requireNonNull(cooldown);
+            if (cooldown.isNegative() || cooldown.compareTo(Duration.ofDays(365)) > 0
+                    || !Double.isFinite(range) || range <= 0 || range > 64) {
+                throw new IllegalArgumentException("Invalid Purify settings");
+            }
+        }
+        public static Settings defaults() { return new Settings(Duration.ofSeconds(15), 12); }
+    }
+
+    public record Support(UUID supportingCharacter, EquipmentSessions.Active aided, BigDecimal amount) {
+        public Support {
+            Objects.requireNonNull(supportingCharacter); Objects.requireNonNull(aided); Objects.requireNonNull(amount);
+            if (amount.signum() <= 0) throw new IllegalArgumentException("Support amount must be positive");
+        }
+    }
+
+    private record Target(Player player, EquipmentSessions.Active active) { }
+    private static final List<PotionEffectType> HARMFUL = List.of(
+        PotionEffectType.POISON, PotionEffectType.WITHER, PotionEffectType.SLOWNESS, PotionEffectType.WEAKNESS);
+
+    private final EquipmentSessions sessions;
+    private final PartyRoster parties;
+    private final Consumer<Support> supports;
+    private volatile Settings settings;
+
+    public Purify(Settings settings, EquipmentSessions sessions, PartyRoster parties, Consumer<Support> supports) {
+        this.settings = Objects.requireNonNull(settings); this.sessions = Objects.requireNonNull(sessions);
+        this.parties = Objects.requireNonNull(parties); this.supports = Objects.requireNonNull(supports);
+    }
+
+    public void configure(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+
+    public AbilityDefinition definition() {
+        var current = settings;
+        return new AbilityDefinition("purify", "Purify", Material.HONEY_BOTTLE,
+            List.of("Remove Poison, Wither, Slowness and Weakness.",
+                "Aimed party-ally range: " + decimal(current.range()) + " blocks; beneficial effects remain."),
+            "Sneak+Use cleanses self; normal Use requires an aimed active party ally.",
+            Map.of(Stat.WIS, BigInteger.valueOf(14), Stat.CHR, BigInteger.TEN), BigInteger.ONE,
+            AbilityDefinition.Activation.IMMEDIATE, ControlInput.Gesture.USE, current.cooldown(),
+            Map.of("range", BigDecimal.valueOf(current.range()).stripTrailingZeros()),
+            AbilityDefinition.TargetPolicy.PARTY, this);
+    }
+
+    @Override public boolean accepts(ControlInput input) {
+        var target = target(input, settings.range());
+        return target != null && HARMFUL.stream().anyMatch(type -> target.player().getPotionEffect(type) != null);
+    }
+
+    @Override public void activate(AbilityExecution execution) {
+        if (!execution.stillCurrent()) return;
+        var configured = from(execution.definition()); var target = target(execution.input(), configured.range());
+        if (target == null) return;
+        int removed = 0;
+        for (var type : HARMFUL) {
+            if (!execution.stillCurrent() || !current(execution.input(), target, configured.range())) break;
+            if (target.player().getPotionEffect(type) == null) continue;
+            target.player().removePotionEffect(type);
+            if (target.player().getPotionEffect(type) == null) removed++;
+        }
+        if (removed == 0) return;
+        execution.input().player().sendMessage("Purify removed " + removed + " harmful effect" + (removed == 1 ? "." : "s."));
+        if (target.player() != execution.input().player()
+                && execution.stillCurrent() && current(execution.input(), target, configured.range())) {
+            var amount = BigDecimal.valueOf(removed);
+            supports.accept(new Support(execution.input().session().character(), target.active(), amount));
+            target.player().sendMessage("Purify removed " + removed + " harmful effect" + (removed == 1 ? "." : "s."));
+        }
+    }
+
+    private Target target(ControlInput input, double range) {
+        if (!(input.target() instanceof Player player)) return null;
+        if (input.player().isSneaking()) {
+            if (player != input.player()) return null;
+        } else if (player == input.player() || !inRange(input.player(), player, range) || !sameParty(input.player(), player)) {
+            return null;
+        }
+        var active = sessions.active(player.getUniqueId()).filter(sessions::current).orElse(null);
+        return active == null ? null : new Target(player, active);
+    }
+
+    private boolean current(ControlInput input, Target target, double range) {
+        if (!sessions.current(target.active())) return false;
+        if (target.player() == input.player()) return input.player().isSneaking();
+        return !input.player().isSneaking() && inRange(input.player(), target.player(), range)
+            && sameParty(input.player(), target.player());
+    }
+
+    private boolean sameParty(Player source, Player target) {
+        var party = parties.partyOf(source.getUniqueId()).orElse(null);
+        return party != null && party.members().contains(target.getUniqueId());
+    }
+
+    private static boolean inRange(Player source, Player target, double range) {
+        try {
+            var from = source.getLocation(); var to = target.getLocation();
+            return from.getWorld() == to.getWorld() && from.distanceSquared(to) <= range * range && source.hasLineOfSight(target);
+        } catch (RuntimeException invalid) { return false; }
+    }
+
+    private static Settings from(AbilityDefinition definition) {
+        return new Settings(definition.cooldown(), definition.parameters().get("range").doubleValue());
+    }
+
+    private static String decimal(double value) { return BigDecimal.valueOf(value).stripTrailingZeros().toPlainString(); }
+}

src/main/java/games/dmg/fantasystick/ability/Quickstep.java

@@ -0,0 +1,153 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.function.Consumer;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerMoveEvent;
+import org.bukkit.event.player.PlayerVelocityEvent;
+import org.bukkit.util.Vector;
+
+/** Quickstep's grounded, collision-respecting, owned horizontal velocity adapter. */
+public final class Quickstep implements AbilityEffect, Listener, AutoCloseable {
+    public record Settings(Duration cooldown, double distance, double speedPerTick) {
+        public Settings {
+            Objects.requireNonNull(cooldown);
+            if (cooldown.isNegative() || cooldown.compareTo(Duration.ofDays(365)) > 0
+                    || !Double.isFinite(distance) || distance <= 0 || distance > 64
+                    || !Double.isFinite(speedPerTick) || speedPerTick < 0.01 || speedPerTick > 8) {
+                throw new IllegalArgumentException("Invalid Quickstep settings");
+            }
+        }
+        public static Settings defaults() { return new Settings(Duration.ofSeconds(5), 4, 1); }
+    }
+
+    private final class State implements AutoCloseable {
+        final AbilityExecution execution;
+        final Player player;
+        final Location origin;
+        final Vector horizontal;
+        final Settings settings;
+        boolean owned = true;
+        boolean closed;
+        State(AbilityExecution execution, Player player, Location origin, Vector horizontal, Settings settings) {
+            this.execution = execution; this.player = player; this.origin = origin;
+            this.horizontal = horizontal; this.settings = settings;
+        }
+        boolean stillOwns(Vector current) {
+            var horizontalCurrent = new Vector(current.getX(), 0, current.getZ());
+            double magnitude = horizontalCurrent.length();
+            if (magnitude < 1.0e-6) return true;
+            return magnitude <= horizontal.length() * 1.05 + 1.0e-6
+                && horizontalCurrent.clone().normalize().dot(horizontal.clone().normalize()) >= 0.99;
+        }
+        @Override public void close() {
+            if (closed) return;
+            closed = true; dashes.remove(player.getUniqueId(), this);
+            if (!owned) return;
+            Vector current = player.getVelocity();
+            if (!stillOwns(current)) return;
+            player.setVelocity(new Vector(0, current.getY(), 0));
+        }
+    }
+
+    private volatile Settings settings;
+    private final Consumer<PlayerVelocityEvent> velocityEvents;
+    private final Map<UUID, State> dashes = new HashMap<>();
+    private boolean closed;
+
+    public Quickstep(Settings settings, Consumer<PlayerVelocityEvent> velocityEvents) {
+        this.settings = Objects.requireNonNull(settings); this.velocityEvents = Objects.requireNonNull(velocityEvents);
+    }
+    public void configure(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+
+    public AbilityDefinition definition() {
+        var current = settings;
+        return new AbilityDefinition("quickstep", "Quickstep", Material.RABBIT_FOOT,
+            List.of("Dash forward with native horizontal movement.",
+                "Travel up to " + decimal(current.distance()) + " blocks while obstacles remain authoritative."),
+            "Use while grounded, on foot, and not flying or gliding.",
+            Map.of(Stat.DEX, BigInteger.valueOf(12)), BigInteger.ONE,
+            AbilityDefinition.Activation.DELAYED, ControlInput.Gesture.USE, current.cooldown(),
+            Map.of("distance", BigDecimal.valueOf(current.distance()).stripTrailingZeros(),
+                "speed", BigDecimal.valueOf(current.speedPerTick()).stripTrailingZeros()),
+            AbilityDefinition.TargetPolicy.SELF, this);
+    }
+
+    @Override public boolean accepts(ControlInput input) {
+        var player = input.player();
+        if (!player.isOnGround() || player.isFlying() || player.isGliding() || player.isInsideVehicle()) return false;
+        Vector direction = player.getEyeLocation().getDirection(); direction.setY(0);
+        return finite(direction) && direction.lengthSquared() > 1.0e-12;
+    }
+
+    @Override public void activate(AbilityExecution execution) {
+        if (closed || !execution.stillCurrent()) return;
+        var current = from(execution.definition());
+        var player = execution.input().player();
+        if (!accepts(execution.input())) { execution.finish(); return; }
+        Vector direction = player.getEyeLocation().getDirection(); direction.setY(0).normalize();
+        Vector before = player.getVelocity();
+        Vector horizontal = direction.multiply(current.speedPerTick());
+        var proposed = new Vector(horizontal.getX(), before.getY(), horizontal.getZ());
+        var event = new PlayerVelocityEvent(player, proposed.clone());
+        velocityEvents.accept(event);
+        if (event.isCancelled() || !finite(event.getVelocity())) { execution.finish(); return; }
+        Vector accepted = event.getVelocity().clone(); accepted.setY(before.getY());
+        Vector acceptedHorizontal = new Vector(accepted.getX(), 0, accepted.getZ());
+        if (acceptedHorizontal.lengthSquared() < 1.0e-12) { execution.finish(); return; }
+        var state = new State(execution, player, player.getLocation().clone(), acceptedHorizontal, current);
+        var previous = dashes.put(player.getUniqueId(), state);
+        if (previous != null) previous.execution.finish();
+        execution.own(state);
+        player.setVelocity(accepted);
+        long ticks = Math.max(1, (long) Math.ceil(current.distance() / acceptedHorizontal.length()));
+        execution.later(Duration.ofMillis(Math.multiplyExact(ticks + 1, 50)), execution::finish);
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void moved(PlayerMoveEvent event) {
+        var state = dashes.get(event.getPlayer().getUniqueId());
+        if (state == null || state.player != event.getPlayer()) return;
+        var to = event.getTo();
+        if (to == null || !state.execution.stillCurrent()) { state.execution.finish(); return; }
+        Vector current = state.player.getVelocity();
+        if (!state.stillOwns(current)) {
+            state.owned = false; state.execution.finish(); return;
+        }
+        double dx = to.getX() - state.origin.getX(); double dz = to.getZ() - state.origin.getZ();
+        if (dx * dx + dz * dz >= state.settings.distance() * state.settings.distance()
+                || new Vector(current.getX(), 0, current.getZ()).lengthSquared() < 1.0e-12) {
+            state.execution.finish();
+        }
+    }
+
+    private static boolean finite(Vector vector) {
+        return Double.isFinite(vector.getX()) && Double.isFinite(vector.getY()) && Double.isFinite(vector.getZ());
+    }
+    private static Settings from(AbilityDefinition definition) {
+        return new Settings(definition.cooldown(), definition.parameters().get("distance").doubleValue(),
+            definition.parameters().get("speed").doubleValue());
+    }
+    private static BigDecimal decimal(double value) { return BigDecimal.valueOf(value).stripTrailingZeros(); }
+
+    @Override public void close() {
+        if (closed) return;
+        closed = true;
+        for (var state : List.copyOf(dashes.values())) state.execution.finish();
+        dashes.clear();
+    }
+}

src/main/java/games/dmg/fantasystick/ability/RallyingCry.java

@@ -0,0 +1,227 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.party.PartyRoster;
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import org.bukkit.Material;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.Player;
+import org.bukkit.potion.PotionEffect;
+import org.bukkit.potion.PotionEffectType;
+
+/** Dynamic owned party sphere for Rallying Cry movement and outgoing damage benefits. */
+public final class RallyingCry implements AbilityEffect, AutoCloseable {
+    public record Settings(Duration cooldown, double radius, Duration duration,
+                           int speedAmplifier, BigDecimal damageBonusPercent) {
+        public Settings {
+            Objects.requireNonNull(cooldown); Objects.requireNonNull(duration); Objects.requireNonNull(damageBonusPercent);
+            if (cooldown.isNegative() || cooldown.compareTo(Duration.ofDays(365)) > 0
+                    || !Double.isFinite(radius) || radius <= 0 || radius > 64
+                    || duration.isNegative() || duration.isZero() || duration.compareTo(Duration.ofDays(1)) > 0
+                    || speedAmplifier < 0 || speedAmplifier > 255
+                    || damageBonusPercent.signum() < 0 || damageBonusPercent.compareTo(BigDecimal.valueOf(100)) > 0) {
+                throw new IllegalArgumentException("Invalid Rallying Cry settings");
+            }
+        }
+        public static Settings defaults() {
+            return new Settings(Duration.ofSeconds(25), 8, Duration.ofSeconds(6), 0, BigDecimal.valueOf(20));
+        }
+    }
+
+    private final class Area implements AutoCloseable {
+        final long sequence; final AbilityExecution execution; final Player source; final Settings settings;
+        final Map<UUID, Benefit> recipients = new java.util.HashMap<>(); boolean closed;
+        Area(AbilityExecution execution, Settings settings) {
+            sequence = ++sequences; this.execution = execution; source = execution.input().player(); this.settings = settings;
+        }
+        void refresh() {
+            if (closed) return;
+            if (!sourceCurrent()) { breakArea(this); return; }
+            var eligible = candidates();
+            for (var entry : List.copyOf(recipients.entrySet())) {
+                if (!eligible.containsKey(entry.getKey())) entry.getValue().close();
+            }
+            for (var entry : eligible.entrySet()) {
+                if (!recipients.containsKey(entry.getKey())) {
+                    var benefit = new Benefit(this, entry.getValue()); recipients.put(entry.getKey(), benefit);
+                }
+            }
+        }
+        boolean sourceCurrent() {
+            return execution.stillCurrent() && sessions.active(source.getUniqueId())
+                .filter(active -> active.equals(execution.input().session()) && sessions.current(active)).isPresent();
+        }
+        boolean eligible(Player player) {
+            if (!sourceCurrent()) return false;
+            var active = sessions.active(player.getUniqueId()).filter(sessions::current).orElse(null);
+            if (active == null || !inside(source, player, settings.radius())) return false;
+            if (player == source) return active.equals(execution.input().session());
+            var sourceParty = parties.partyOf(source.getUniqueId()).orElse(null);
+            var recipientParty = parties.partyOf(player.getUniqueId()).orElse(null);
+            return sourceParty != null && recipientParty != null && sourceParty.id().equals(recipientParty.id());
+        }
+        Map<UUID, Player> candidates() {
+            var result = new LinkedHashMap<UUID, Player>();
+            if (eligible(source)) result.put(source.getUniqueId(), source);
+            List<Entity> nearby;
+            try { nearby = source.getNearbyEntities(settings.radius(), settings.radius(), settings.radius()); }
+            catch (RuntimeException unavailable) { nearby = List.of(); }
+            int inspected = 0;
+            for (var entity : nearby) {
+                if (++inspected > 256 || result.size() == 64) break;
+                if (entity instanceof Player player && eligible(player)) result.putIfAbsent(player.getUniqueId(), player);
+            }
+            return result;
+        }
+        @Override public void close() {
+            if (closed) return; closed = true; areas.remove(sequence, this);
+            for (var benefit : List.copyOf(recipients.values())) benefit.close(); recipients.clear();
+        }
+    }
+
+    private final class Benefit implements AutoCloseable {
+        final Area area; final Player player; final AutoCloseable speed; final AutoCloseable bonus; boolean closed;
+        Benefit(Area area, Player player) {
+            this.area = area; this.player = player;
+            speed = speed(player, area.settings.speedAmplifier());
+            bonus = bonuses.grant(area.execution, player, area.settings.damageBonusPercent(), () -> !closed && area.eligible(player));
+        }
+        @Override public void close() {
+            if (closed) return; closed = true; area.recipients.remove(player.getUniqueId(), this);
+            closeResource(bonus); closeResource(speed);
+        }
+    }
+
+    private final class SpeedGrant implements AutoCloseable {
+        final SpeedState state; final long sequence; final int amplifier; boolean closed;
+        SpeedGrant(SpeedState state, int amplifier) { this.state = state; sequence = ++speedSequences; this.amplifier = amplifier; }
+        @Override public void close() { if (closed) return; closed = true; state.grants.remove(this); state.refresh(); }
+    }
+    private final class SpeedState {
+        final Player player; final List<SpeedGrant> grants = new ArrayList<>(); PotionEffect owned;
+        SpeedState(Player player) { this.player = player; }
+        void refresh() {
+            PotionEffect current;
+            try { current = player.getPotionEffect(PotionEffectType.SPEED); }
+            catch (RuntimeException unavailable) { return; }
+            if (owned != null && !same(current, owned)) owned = null;
+            SpeedGrant strongest = null;
+            for (var grant : List.copyOf(grants)) if (!grant.closed && (strongest == null
+                    || grant.amplifier > strongest.amplifier
+                    || grant.amplifier == strongest.amplifier && grant.sequence < strongest.sequence)) strongest = grant;
+            if (strongest == null) {
+                if (owned != null && same(current, owned) && !removeOwned()) return;
+                owned = null; speeds.remove(player.getUniqueId(), this); return;
+            }
+            if (owned != null && same(current, owned) && owned.getAmplifier() != strongest.amplifier) {
+                if (!removeOwned()) return;
+                current = null;
+            }
+            if (current != null && current.getAmplifier() >= strongest.amplifier) return;
+            var effect = new PotionEffect(PotionEffectType.SPEED, PotionEffect.INFINITE_DURATION,
+                strongest.amplifier, false, false, true);
+            try { if (player.addPotionEffect(effect, true)) owned = effect; }
+            catch (RuntimeException ignored) { owned = null; }
+        }
+        boolean removeOwned() {
+            try {
+                player.removePotionEffect(PotionEffectType.SPEED);
+                if (same(player.getPotionEffect(PotionEffectType.SPEED), owned)) return false;
+            } catch (RuntimeException failure) { return false; }
+            owned = null; return true;
+        }
+    }
+
+    private volatile Settings settings;
+    private final EquipmentSessions sessions;
+    private final PartyRoster parties;
+    private final OutgoingDamageBonus bonuses;
+    private final Map<Long, Area> areas = new java.util.HashMap<>();
+    private final Map<UUID, SpeedState> speeds = new java.util.HashMap<>();
+    private long sequences; private long speedSequences;
+    private org.bukkit.scheduler.BukkitTask sweepTask;
+    private boolean closed;
+
+    public RallyingCry(Settings settings, EquipmentSessions sessions, PartyRoster parties, OutgoingDamageBonus bonuses) {
+        this.settings = Objects.requireNonNull(settings); this.sessions = Objects.requireNonNull(sessions);
+        this.parties = Objects.requireNonNull(parties); this.bonuses = Objects.requireNonNull(bonuses);
+    }
+    public void configure(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+    public void install(org.bukkit.plugin.Plugin plugin) {
+        Objects.requireNonNull(plugin);
+        if (closed || sweepTask != null) throw new IllegalStateException("Rallying Cry sweep already installed or closed");
+        sweepTask = plugin.getServer().getScheduler().runTaskTimer(plugin, this::sweep, 1, 1);
+    }
+    public void sweep() {
+        if (closed) return; int checked = 0;
+        for (var area : List.copyOf(areas.values())) { area.refresh(); if (++checked == 64) break; }
+        for (var state : List.copyOf(speeds.values())) state.refresh();
+    }
+
+    public AbilityDefinition definition() {
+        var current = settings;
+        return new AbilityDefinition("rallying_cry", "Rallying Cry", Material.GOAT_HORN,
+            List.of("Grant nearby active party members Speed " + (current.speedAmplifier() + 1)
+                    + " and " + decimal(current.damageBonusPercent()) + "% combat damage.",
+                "A " + decimal(BigDecimal.valueOf(current.radius())) + "-block sphere lasting " + seconds(current.duration()) + " seconds."),
+            "Use to rally yourself and nearby active party members; copies do not stack.",
+            Map.of(Stat.CHR, BigInteger.valueOf(16), Stat.CON, BigInteger.valueOf(12)), BigInteger.ONE,
+            AbilityDefinition.Activation.DELAYED, ControlInput.Gesture.USE, current.cooldown(),
+            Map.of("radius", BigDecimal.valueOf(current.radius()).stripTrailingZeros(),
+                "duration-seconds", BigDecimal.valueOf(current.duration().toNanos()).movePointLeft(9),
+                "speed-amplifier", BigDecimal.valueOf(current.speedAmplifier()),
+                "damage-bonus-percent", current.damageBonusPercent()), AbilityDefinition.TargetPolicy.AREA, this);
+    }
+
+    @Override public boolean accepts(ControlInput input) { return !closed && input.target() == null; }
+    @Override public void activate(AbilityExecution execution) {
+        if (closed || !execution.stillCurrent()) return;
+        var area = new Area(execution, from(execution.definition())); areas.put(area.sequence, area);
+        execution.own(area); area.refresh(); execution.later(area.settings.duration(), execution::finish);
+    }
+
+    private AutoCloseable speed(Player player, int amplifier) {
+        var state = speeds.computeIfAbsent(player.getUniqueId(), ignored -> new SpeedState(player));
+        var grant = new SpeedGrant(state, amplifier); state.grants.add(grant); state.refresh(); return grant;
+    }
+    private void breakArea(Area area) { area.close(); area.execution.finish(); }
+    private static boolean inside(Player source, Player target, double radius) {
+        try { var a = source.getLocation(); var b = target.getLocation();
+            return a.getWorld() == b.getWorld() && a.distanceSquared(b) <= radius * radius;
+        } catch (RuntimeException invalid) { return false; }
+    }
+    private static boolean same(PotionEffect first, PotionEffect second) {
+        return first != null && second != null && first.getType().equals(second.getType())
+            && first.getAmplifier() == second.getAmplifier() && first.isInfinite() && second.isInfinite();
+    }
+    private static void closeResource(AutoCloseable resource) {
+        try { resource.close(); } catch (Exception impossible) { throw new IllegalStateException(impossible); }
+    }
+    private static Settings from(AbilityDefinition definition) {
+        var parameters = definition.parameters();
+        return new Settings(definition.cooldown(), parameters.get("radius").doubleValue(),
+            Duration.ofNanos(parameters.get("duration-seconds").movePointRight(9).longValueExact()),
+            parameters.get("speed-amplifier").intValueExact(), parameters.get("damage-bonus-percent"));
+    }
+    private static String decimal(BigDecimal value) { return value.stripTrailingZeros().toPlainString(); }
+    private static String seconds(Duration duration) {
+        return decimal(BigDecimal.valueOf(duration.toNanos()).movePointLeft(9));
+    }
+
+    @Override public void close() {
+        if (closed) return; closed = true; if (sweepTask != null) sweepTask.cancel();
+        for (var area : List.copyOf(areas.values())) area.execution.finish(); areas.clear();
+        for (var state : List.copyOf(speeds.values())) { state.grants.clear(); state.refresh(); }
+        speeds.clear();
+    }
+}

src/main/java/games/dmg/fantasystick/ability/Revive.java

@@ -0,0 +1,376 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.items.CharacterSheets;
+import games.dmg.fantasystick.items.TailBooks;
+import games.dmg.fantasystick.persistence.CharacterRecord;
+import games.dmg.fantasystick.persistence.CharacterStorage;
+import games.dmg.fantasystick.persistence.RevivalStore;
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Clock;
+import java.time.Duration;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import java.util.ArrayList;
+import java.util.IdentityHashMap;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.function.Consumer;
+import net.kyori.adventure.text.Component;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.inventory.Inventory;
+import org.bukkit.inventory.ItemStack;
+
+/** Revive target selection, contained popup and proof-based Tail conversion. */
+public final class Revive implements AbilityEffect, Listener, AutoCloseable {
+    public interface PopupFactory { Inventory create(int size, Component title); }
+    private static final Duration DEATH_AGE = Duration.ofHours(24);
+    private static final Duration VIEW_TIME = Duration.ofMinutes(5);
+    private static final double RANGE = 12;
+    private record Candidate(int slot, ItemStack captured, TailBooks.Identity identity) { }
+    private record Choice(Candidate candidate, CharacterRecord record) { }
+
+    private final CharacterStorage characters;
+    private final RevivalStore reservations;
+    private final Clock clock;
+    private final Consumer<Runnable> nextTick;
+    private final PopupFactory popups;
+    private final Consumer<Throwable> failures;
+    private final TailBooks tails = new TailBooks();
+    private final CharacterSheets sheets = new CharacterSheets();
+    private final Map<Inventory, View> inventories = new IdentityHashMap<>();
+    private final Map<UUID, View> targets = new LinkedHashMap<>();
+    private boolean closed;
+
+    private final class View implements AutoCloseable {
+        final AbilityExecution execution;
+        final Player target;
+        final Inventory inventory;
+        final Map<Integer, Choice> choices;
+        boolean selecting;
+        boolean finished;
+        View(AbilityExecution execution, Player target, Inventory inventory, Map<Integer, Choice> choices) {
+            this.execution = execution; this.target = target; this.inventory = inventory; this.choices = choices;
+        }
+        @Override public void close() {
+            if (finished) return;
+            finished = true;
+            inventories.remove(inventory, this); targets.remove(target.getUniqueId(), this);
+            inventory.clear();
+            try { target.closeInventory(); } catch (RuntimeException failure) { report(failure); }
+        }
+    }
+
+    public Revive(CharacterStorage characters, RevivalStore reservations, Clock clock, Consumer<Runnable> nextTick,
+                  PopupFactory popups, Consumer<Throwable> failures) {
+        this.characters = Objects.requireNonNull(characters); this.reservations = Objects.requireNonNull(reservations);
+        this.clock = Objects.requireNonNull(clock); this.nextTick = Objects.requireNonNull(nextTick);
+        this.popups = Objects.requireNonNull(popups); this.failures = Objects.requireNonNull(failures);
+    }
+
+    public AbilityDefinition definition() {
+        return new AbilityDefinition("revive", "Revive", Material.ECHO_SHARD,
+            List.of("Let another player continue one fallen character.", "A valid cast spends the daily opportunity."),
+            "Use the equipped shard while aiming at another player within 12 blocks.",
+            Map.of(Stat.WIS, BigInteger.valueOf(30), Stat.CHR, BigInteger.valueOf(24), Stat.CON, BigInteger.valueOf(12)),
+            BigInteger.ONE, AbilityDefinition.Activation.SELECTION, ControlInput.Gesture.USE, Duration.ofHours(24),
+            Map.of("range", BigDecimal.valueOf(12), "selection-time", BigDecimal.valueOf(300),
+                "death-age", BigDecimal.valueOf(86400)),
+            AbilityDefinition.TargetPolicy.EXCEPTIONAL_NONCOMBAT_SELECTION, this);
+    }
+
+    @Override public boolean accepts(ControlInput input) { return !closed && target(input) != null; }
+
+    @Override public void activate(AbilityExecution execution) {
+        if (closed || !execution.stillCurrent()) { execution.finish(); return; }
+        Player target = target(execution.input());
+        if (target == null) {
+            execution.input().player().sendMessage("Revive found no eligible player within 12 blocks and line of sight.");
+            execution.finish(); return;
+        }
+        var captured = candidates(target);
+        if (captured.isEmpty()) {
+            execution.input().player().sendMessage("That player has no direct-inventory Tail eligible for Revive.");
+            execution.finish(); return;
+        }
+        var loads = captured.stream().map(candidate -> characters.find(candidate.identity().characterId())).toList();
+        CompletableFuture.allOf(loads.toArray(CompletableFuture[]::new)).whenComplete((ignored, failure) -> schedule(() -> {
+            if (failure != null) { report(failure); execution.input().player().sendMessage("Revive could not inspect those Tails safely."); execution.finish(); return; }
+            if (closed || !execution.stillCurrent() || !target.isOnline()) { execution.finish(); return; }
+            var eligible = new ArrayList<Choice>();
+            Instant now = clock.instant();
+            for (int index = 0; index < captured.size(); index++) {
+                var found = loads.get(index).join();
+                if (found.isEmpty()) continue;
+                var record = found.orElseThrow();
+                var candidate = captured.get(index);
+                if (eligible(record, candidate.identity(), now) && unchanged(target, candidate)) eligible.add(new Choice(candidate, record));
+            }
+            if (eligible.isEmpty()) {
+                execution.input().player().sendMessage("That player has no current Tail younger than 24 hours.");
+                execution.finish(); return;
+            }
+            open(execution, target, eligible, now);
+        }));
+    }
+
+    private Player target(ControlInput input) {
+        Player caster = input.player();
+        Entity supplied = input.target();
+        Player selected = supplied instanceof Player player ? player : null;
+        if (selected == null) {
+            Location eye = caster.getEyeLocation();
+            var hit = caster.getWorld().rayTraceEntities(eye, eye.getDirection(), RANGE,
+                entity -> entity instanceof Player && entity != caster);
+            if (hit != null && hit.getHitEntity() instanceof Player player) selected = player;
+        }
+        if (selected == null || selected == caster || !selected.isOnline() || selected.getWorld() != caster.getWorld()
+                || selected.getLocation().distanceSquared(caster.getLocation()) > RANGE * RANGE
+                || !caster.hasLineOfSight(selected)) return null;
+        return selected;
+    }
+
+    private List<Candidate> candidates(Player target) {
+        var result = new ArrayList<Candidate>();
+        for (int slot = 0; slot <= 40; slot++) {
+            if (slot > 35 && slot != 40) continue;
+            ItemStack item = target.getInventory().getItem(slot);
+            if (item == null || item.isEmpty()) continue;
+            var identity = tails.identify(item);
+            if (identity.isPresent()) result.add(new Candidate(slot, item.clone(), identity.orElseThrow()));
+        }
+        return List.copyOf(result);
+    }
+
+    private boolean eligible(CharacterRecord record, TailBooks.Identity identity, Instant now) {
+        if (!record.dead() || !record.id().equals(identity.characterId()) || !Objects.equals(record.deathId(), identity.deathId())) return false;
+        Duration age = Duration.between(record.diedAt(), now);
+        return !age.isNegative() && age.compareTo(DEATH_AGE) < 0;
+    }
+
+    private boolean unchanged(Player target, Candidate candidate) {
+        ItemStack current = target.getInventory().getItem(candidate.slot());
+        return current != null && current.equals(candidate.captured());
+    }
+
+    private void open(AbilityExecution execution, Player target, List<Choice> eligible, Instant now) {
+        View old = targets.get(target.getUniqueId()); if (old != null) old.execution.finish();
+        int size = Math.min(54, Math.max(9, ((eligible.size() + 8) / 9) * 9));
+        Inventory inventory = popups.create(size, Component.text("Choose a Tail to Revive"));
+        var choices = new LinkedHashMap<Integer, Choice>();
+        for (int index = 0; index < eligible.size() && index < size; index++) {
+            Choice choice = eligible.get(index); ItemStack display = choice.candidate().captured().clone(); display.setAmount(1);
+            var meta = display.getItemMeta();
+            long seconds = Math.max(0, Duration.between(now, choice.record().diedAt().plus(DEATH_AGE)).toSeconds());
+            meta.lore(List.of(Component.text("Level " + choice.record().level()),
+                Component.text("Eligible for " + seconds + " more seconds"), Component.text("Click to continue this character")));
+            display.setItemMeta(meta); inventory.setItem(index, display); choices.put(index, choice);
+        }
+        var view = new View(execution, target, inventory, Map.copyOf(choices));
+        inventories.put(inventory, view); targets.put(target.getUniqueId(), view); execution.own(view);
+        target.openInventory(inventory);
+        execution.later(VIEW_TIME, execution::finish);
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST)
+    public void click(org.bukkit.event.inventory.InventoryClickEvent event) {
+        var view = inventories.get(event.getView().getTopInventory());
+        if (view == null) return;
+        event.setCancelled(true);
+        if (event.getWhoClicked() != view.target || event.getRawSlot() < 0 || event.getRawSlot() >= view.inventory.getSize()) return;
+        Choice choice = view.choices.get(event.getRawSlot());
+        if (choice == null || view.selecting) return;
+        view.selecting = true; inventories.remove(view.inventory, view); targets.remove(view.target.getUniqueId(), view);
+        view.inventory.clear(); view.target.closeInventory();
+        confirm(view, choice);
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST)
+    public void drag(org.bukkit.event.inventory.InventoryDragEvent event) {
+        var view = inventories.get(event.getView().getTopInventory());
+        if (view != null && event.getRawSlots().stream().anyMatch(slot -> slot < view.inventory.getSize())) event.setCancelled(true);
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void close(org.bukkit.event.inventory.InventoryCloseEvent event) {
+        var view = inventories.get(event.getView().getTopInventory());
+        if (view != null && !view.selecting) view.execution.finish();
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void quit(org.bukkit.event.player.PlayerQuitEvent event) {
+        var targetView = targets.get(event.getPlayer().getUniqueId()); if (targetView != null) targetView.execution.finish();
+        for (var view : List.copyOf(inventories.values())) {
+            if (view.execution.input().player() == event.getPlayer()) view.execution.finish();
+        }
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void join(org.bukkit.event.player.PlayerJoinEvent event) { reconcile(event.getPlayer()); }
+
+    private void confirm(View view, Choice choice) {
+        if (closed || !view.execution.stillCurrent() || !view.target.isOnline() || !unchanged(view.target, choice.candidate())) {
+            view.execution.finish(); return;
+        }
+        characters.find(choice.record().id()).whenComplete((found, failure) -> schedule(() -> {
+            if (failure != null) { report(failure); view.execution.input().player().sendMessage("Revive could not recheck that Tail; no item changed."); view.execution.finish(); return; }
+            if (closed || !view.execution.stillCurrent() || !view.target.isOnline() || found.isEmpty()
+                    || !eligible(found.orElseThrow(), choice.candidate().identity(), clock.instant())
+                    || !unchanged(view.target, choice.candidate())) {
+                view.execution.input().player().sendMessage("That Tail is no longer eligible; no item changed.");
+                view.execution.finish(); return;
+            }
+            reserve(view, choice.candidate(), found.orElseThrow());
+        }));
+    }
+
+    private void reserve(View view, Candidate candidate, CharacterRecord dead) {
+        ItemStack source = view.target.getInventory().getItem(candidate.slot());
+        int destination = source.getAmount() == 1 ? -1 : emptyDirectSlot(view.target, candidate.slot());
+        if (source.getAmount() > 1 && destination < 0) {
+            view.target.sendMessage("Revive needs one empty direct inventory slot to preserve the copied Tails.");
+            view.execution.finish(); return;
+        }
+        var reservation = new RevivalStore.Reservation(UUID.randomUUID(), view.execution.character().id(),
+            view.target.getUniqueId(), dead.id(), dead.deathId(), clock.instant().truncatedTo(ChronoUnit.SECONDS),
+            candidate.slot(), source.getAmount(), destination);
+        reservations.reserve(reservation).whenComplete((reserved, failure) -> schedule(() -> {
+            if (failure != null) { report(failure); view.execution.input().player().sendMessage("Revive reservation could not be saved; no Tail changed."); view.execution.finish(); return; }
+            if (reserved.isEmpty() || closed || !view.execution.stillCurrent() || !view.target.isOnline()
+                    || !unchanged(view.target, candidate)) {
+                view.execution.input().player().sendMessage("Revive selection became stale after reservation; no Tail was changed.");
+                view.execution.finish(); return;
+            }
+            deliver(view, dead, reservation);
+        }));
+    }
+
+    private int emptyDirectSlot(Player target, int source) {
+        for (int slot = 0; slot <= 40; slot++) {
+            if (slot > 35 && slot != 40 || slot == source) continue;
+            ItemStack item = target.getInventory().getItem(slot);
+            if (item == null || item.isEmpty()) return slot;
+        }
+        return -1;
+    }
+
+    private void deliver(View view, CharacterRecord dead, RevivalStore.Reservation reservation) {
+        try {
+            var provisional = new CharacterRecord(dead.id(), dead.name(), dead.revision(), dead.stats(), dead.level(), dead.experience(),
+                dead.unspentPoints(), dead.maximumHealth(), dead.learned(), dead.loadout(), dead.cooldowns(), dead.restrictedKills(),
+                false, dead.deathId(), dead.diedAt());
+            ItemStack sheet = sheets.create(provisional);
+            ItemStack source = view.target.getInventory().getItem(reservation.sourceSlot());
+            if (reservation.sourceAmount() == 1) view.target.getInventory().setItem(reservation.sourceSlot(), sheet);
+            else {
+                view.target.getInventory().setItem(reservation.destinationSlot(), sheet);
+                var remaining = source.clone(); remaining.setAmount(reservation.sourceAmount() - 1);
+                view.target.getInventory().setItem(reservation.sourceSlot(), remaining);
+            }
+            view.target.updateInventory();
+        } catch (RuntimeException uncertain) {
+            report(uncertain); view.target.sendMessage("Revive item delivery is uncertain; retained proof requires recovery.");
+            view.execution.finish(); return;
+        }
+        var nativeLimit = games.dmg.fantasystick.session.NativeHealthLimit.read();
+        characters.restoreDeathRecord(reservation.character(), reservation.death(), nativeLimit)
+            .whenComplete((restored, failure) -> schedule(() -> {
+                if (failure != null || restored.isEmpty()) {
+                    if (failure != null) report(failure);
+                    view.target.sendMessage("The Tail changed, but character restoration is pending recovery; do not move the sheet.");
+                    view.execution.finish(); return;
+                }
+                if (installFinalSheet(view.target, restored.orElseThrow())) {
+                    reservations.clear(reservation.character(), reservation.id()).exceptionally(failure2 -> { report(failure2); return false; });
+                    view.target.sendMessage("Restored character sheet: " + restored.orElseThrow().name() + ".");
+                    view.execution.input().player().sendMessage("Revive restored " + restored.orElseThrow().name() + ".");
+                } else view.target.sendMessage("Character restoration was saved, but sheet custody is ambiguous; retained proof requires recovery.");
+                view.execution.finish();
+            }));
+    }
+
+    private boolean installFinalSheet(Player target, CharacterRecord record) {
+        int slot = uniqueSheetSlot(target, record.id());
+        if (slot < 0) return false;
+        target.getInventory().setItem(slot, sheets.create(record)); target.updateInventory(); return true;
+    }
+
+    private int uniqueSheetSlot(Player target, UUID character) {
+        int found = -1;
+        for (int slot = 0; slot <= 40; slot++) {
+            if (slot > 35 && slot != 40) continue;
+            if (sheets.identify(target.getInventory().getItem(slot)).filter(character::equals).isEmpty()) continue;
+            if (found >= 0) return -2;
+            found = slot;
+        }
+        return found;
+    }
+
+    public void reconcile(Player target) {
+        if (closed || !target.isOnline()) return;
+        reservations.target(target.getUniqueId()).whenComplete((found, failure) -> {
+            if (failure != null) { report(failure); return; }
+            for (var reservation : found) characters.find(reservation.character()).whenComplete((record, loadFailure) -> schedule(() -> {
+                if (loadFailure != null) { report(loadFailure); return; }
+                if (closed || !target.isOnline() || record.isEmpty()) return;
+                reconcile(target, reservation, record.orElseThrow());
+            }));
+        });
+    }
+
+    private void reconcile(Player target, RevivalStore.Reservation reservation, CharacterRecord record) {
+        int foundSheet = uniqueSheetSlot(target, reservation.character());
+        boolean hasSheet = foundSheet >= 0;
+        ItemStack source = target.getInventory().getItem(reservation.sourceSlot());
+        boolean unchangedTail = source != null && source.getAmount() == reservation.sourceAmount()
+            && tails.identify(source).filter(id -> id.characterId().equals(reservation.character()) && id.deathId().equals(reservation.death())).isPresent();
+        boolean consumedTail = reservation.sourceAmount() == 1 ? hasSheet
+            : source != null && source.getAmount() == reservation.sourceAmount() - 1
+                && tails.identify(source).filter(id -> id.deathId().equals(reservation.death())).isPresent();
+        if (!record.dead() && hasSheet && installFinalSheet(target, record)) {
+            reservations.clear(reservation.character(), reservation.id()); return;
+        }
+        if (record.dead() && unchangedTail && !hasSheet) {
+            reservations.clear(reservation.character(), reservation.id()); return;
+        }
+        if (record.dead() && hasSheet && (consumedTail || unchangedTail && reservation.sourceAmount() > 1)) {
+            if (unchangedTail && reservation.sourceAmount() > 1) {
+                var remaining = source.clone(); remaining.setAmount(source.getAmount() - 1);
+                target.getInventory().setItem(reservation.sourceSlot(), remaining); target.updateInventory();
+            }
+            var nativeLimit = games.dmg.fantasystick.session.NativeHealthLimit.read();
+            (reservation.administrative()
+                ? characters.restoreDeathRecordAdministratively(reservation.character(), reservation.death(), nativeLimit)
+                : characters.restoreDeathRecord(reservation.character(), reservation.death(), nativeLimit))
+                .whenComplete((restored, failure) -> schedule(() -> {
+                    if (failure != null) { report(failure); return; }
+                    if (restored.isPresent() && installFinalSheet(target, restored.orElseThrow())) {
+                        reservations.clear(reservation.character(), reservation.id());
+                    }
+                }));
+        }
+    }
+
+    private void schedule(Runnable action) {
+        try { nextTick.accept(action); } catch (RuntimeException rejected) { report(rejected); }
+    }
+    private void report(Throwable failure) { try { failures.accept(failure); } catch (RuntimeException ignored) { } }
+
+    @Override public void close() {
+        if (closed) return; closed = true;
+        for (var view : List.copyOf(inventories.values())) view.execution.finish();
+        inventories.clear(); targets.clear();
+    }
+}

src/main/java/games/dmg/fantasystick/ability/Sanctuary.java

@@ -0,0 +1,248 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.party.PartyRoster;
+import games.dmg.fantasystick.persistence.CharacterRecord;
+import games.dmg.fantasystick.persistence.CharacterStorage;
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.Particle;
+import org.bukkit.attribute.Attribute;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.Player;
+import org.bukkit.event.entity.EntityRegainHealthEvent;
+
+/** Fixed bounded Sanctuary cylinder with delayed healing pulses and dynamic strongest mitigation. */
+public final class Sanctuary implements AbilityEffect, AutoCloseable {
+    public record Settings(Duration cooldown, double radius, double verticalRange, Duration duration,
+                           Duration pulseInterval, BigDecimal healingPerPulse, BigDecimal damageReductionPercent) {
+        public Settings {
+            Objects.requireNonNull(cooldown); Objects.requireNonNull(duration); Objects.requireNonNull(pulseInterval);
+            Objects.requireNonNull(healingPerPulse); Objects.requireNonNull(damageReductionPercent);
+            if (cooldown.isNegative() || cooldown.compareTo(Duration.ofDays(365)) > 0
+                    || !Double.isFinite(radius) || radius <= 0 || radius > 64
+                    || !Double.isFinite(verticalRange) || verticalRange < 0 || verticalRange > 64
+                    || duration.isZero() || duration.isNegative() || duration.compareTo(Duration.ofDays(1)) > 0
+                    || pulseInterval.isZero() || pulseInterval.isNegative() || pulseInterval.compareTo(duration) > 0
+                    || duration.toNanos() / pulseInterval.toNanos() > 64
+                    || healingPerPulse.signum() < 0 || healingPerPulse.compareTo(BigDecimal.valueOf(Double.MAX_VALUE)) > 0
+                    || damageReductionPercent.signum() < 0 || damageReductionPercent.compareTo(BigDecimal.valueOf(100)) > 0) {
+                throw new IllegalArgumentException("Invalid Sanctuary settings");
+            }
+        }
+        public static Settings defaults() {
+            return new Settings(Duration.ofSeconds(45), 6, 3, Duration.ofSeconds(6), Duration.ofSeconds(1),
+                BigDecimal.valueOf(2), BigDecimal.valueOf(20));
+        }
+    }
+    private record Target(Player player, EquipmentSessions.Active active, CharacterRecord record) { }
+
+    private final class State implements AutoCloseable {
+        final AbilityExecution execution; final Player source;
+        final Location origin; final Settings captured; final Map<UUID, AutoCloseable> mitigation = new LinkedHashMap<>();
+        Duration elapsed = Duration.ZERO; Duration nextPulse; final Duration scanPeriod;
+        int pending; boolean expired; boolean closed;
+        State(AbilityExecution execution, Settings captured) {
+            this.execution = execution; this.source = execution.input().player(); this.origin = source.getLocation().clone();
+            this.captured = captured; this.nextPulse = captured.pulseInterval();
+            long period = Math.max(50_000_000L, (captured.duration().toNanos() + 59) / 60);
+            this.scanPeriod = Duration.ofNanos(period);
+        }
+        void start() { states.add(this); execution.own(this); reconcile(); visual(); schedule(); }
+        void schedule() {
+            if (closed || expired) return;
+            Duration remaining = captured.duration().minus(elapsed);
+            execution.later(remaining.compareTo(scanPeriod) < 0 ? remaining : scanPeriod, this::step);
+        }
+        void step() {
+            if (closed || !execution.stillCurrent()) { execution.finish(); return; }
+            Duration remaining = captured.duration().minus(elapsed);
+            elapsed = elapsed.plus(remaining.compareTo(scanPeriod) < 0 ? remaining : scanPeriod);
+            reconcile(); visual();
+            while (nextPulse.compareTo(elapsed) <= 0 && nextPulse.compareTo(captured.duration()) <= 0) {
+                pulse(); nextPulse = nextPulse.plus(captured.pulseInterval());
+            }
+            if (elapsed.compareTo(captured.duration()) >= 0) {
+                expired = true; closeMitigation(); if (pending == 0) execution.finish();
+            } else schedule();
+        }
+        void reconcile() {
+            var eligible = recipients();
+            for (var entry : List.copyOf(mitigation.entrySet())) {
+                if (eligible.stream().noneMatch(player -> player.getUniqueId().equals(entry.getKey()))) {
+                    try { entry.getValue().close(); } catch (Exception ignored) { } mitigation.remove(entry.getKey());
+                }
+            }
+            for (var player : eligible) mitigation.computeIfAbsent(player.getUniqueId(), ignored ->
+                combatMitigation.grant(execution, player, captured.damageReductionPercent(), () -> recipientCurrent(player)));
+        }
+        void pulse() {
+            for (var player : recipients()) if (owner(player) == this) heal(player);
+        }
+        void heal(Player player) {
+            var target = target(player); if (target == null) return;
+            var attribute = player.getAttribute(Attribute.MAX_HEALTH); if (attribute == null) return;
+            double current = player.getHealth(), maximum = attribute.getValue(), missing = maximum - current;
+            double proposed = Math.min(missing, captured.healingPerPulse().doubleValue());
+            if (!Double.isFinite(current) || !Double.isFinite(maximum) || !Double.isFinite(proposed) || proposed <= 0) return;
+            var event = new EntityRegainHealthEvent(player, proposed, EntityRegainHealthEvent.RegainReason.CUSTOM);
+            healingEvents.accept(event); double accepted = Math.min(proposed, Math.min(missing, event.getAmount()));
+            if (event.isCancelled() || !Double.isFinite(accepted) || accepted <= 0) return;
+            pending++; var expected = target.record().revision();
+            characters.saveHealth(target.record().id(), expected, BigDecimal.valueOf(current + accepted), nativeLimit.get())
+                .whenComplete((saved, failure) -> {
+                    try { nextTick.accept(() -> completeHeal(this, target, expected, accepted, saved, failure)); }
+                    catch (RuntimeException rejected) { completePending(this); }
+                });
+        }
+        List<Player> recipients() {
+            List<Entity> nearby;
+            try { nearby = new ArrayList<>(source.getWorld().getNearbyEntities(origin,
+                captured.radius(), captured.verticalRange(), captured.radius())); }
+            catch (RuntimeException unavailable) { nearby = new ArrayList<>(); }
+            nearby.addFirst(source); var unique = new LinkedHashMap<UUID, Player>(); int inspected = 0;
+            for (var entity : nearby) {
+                if (++inspected > 256) break;
+                if (entity instanceof Player player && recipientCurrent(player)) unique.putIfAbsent(player.getUniqueId(), player);
+            }
+            var result = new ArrayList<>(unique.values());
+            result.sort(Comparator.comparingDouble((Player player) -> distance(origin, player)).thenComparing(Player::getUniqueId));
+            return result.size() <= 64 ? result : new ArrayList<>(result.subList(0, 64));
+        }
+        boolean recipientCurrent(Player player) {
+            if (closed || !execution.stillCurrent() || !inside(origin, player, captured.radius(), captured.verticalRange())
+                    || !unobstructed(origin, player)) return false;
+            if (player == source) return sessions.active(player.getUniqueId()).filter(sessions::current)
+                .map(active -> active.equals(execution.input().session())).orElse(false);
+            var active = sessions.active(player.getUniqueId()).filter(sessions::current).orElse(null);
+            return active != null && sameParty(source, player);
+        }
+        Target target(Player player) {
+            var active = sessions.active(player.getUniqueId()).filter(sessions::current).orElse(null);
+            var record = active == null ? null : sessions.currentRecord(active).orElse(null);
+            return record == null ? null : new Target(player, active, record);
+        }
+        void visual() {
+            try { source.getWorld().spawnParticle(Particle.END_ROD, origin, 12,
+                captured.radius() / 2, 0.1, captured.radius() / 2, 0); } catch (RuntimeException ignored) { }
+        }
+        void closeMitigation() {
+            for (var grant : List.copyOf(mitigation.values())) try { grant.close(); } catch (Exception ignored) { }
+            mitigation.clear();
+        }
+        @Override public void close() {
+            if (closed) return; closed = true; expired = true; states.remove(this); closeMitigation();
+        }
+    }
+
+    private volatile Settings settings;
+    private final CharacterStorage characters; private final EquipmentSessions sessions; private final PartyRoster parties;
+    private final CombatMitigation combatMitigation; private final Consumer<Runnable> nextTick;
+    private final Consumer<EntityRegainHealthEvent> healingEvents; private final Supplier<BigDecimal> nativeLimit;
+    private final Consumer<MendingLight.Support> supports; private final List<State> states = new ArrayList<>();
+    private boolean closed;
+
+    public Sanctuary(Settings settings, CharacterStorage characters, EquipmentSessions sessions, PartyRoster parties,
+                      CombatMitigation combatMitigation, Consumer<Runnable> nextTick,
+                      Consumer<EntityRegainHealthEvent> healingEvents, Supplier<BigDecimal> nativeLimit,
+                      Consumer<MendingLight.Support> supports) {
+        this.settings = Objects.requireNonNull(settings); this.characters = Objects.requireNonNull(characters);
+        this.sessions = Objects.requireNonNull(sessions); this.parties = Objects.requireNonNull(parties);
+        this.combatMitigation = Objects.requireNonNull(combatMitigation); this.nextTick = Objects.requireNonNull(nextTick);
+        this.healingEvents = Objects.requireNonNull(healingEvents); this.nativeLimit = Objects.requireNonNull(nativeLimit);
+        this.supports = Objects.requireNonNull(supports);
+    }
+    public void configure(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+    public AbilityDefinition definition() {
+        var current = settings;
+        return new AbilityDefinition("sanctuary", "Sanctuary", Material.SEA_LANTERN,
+            List.of("Create a fixed " + decimal(current.radius()) + "-block sanctuary for " + seconds(current.duration()) + " seconds.",
+                "Party members inside heal " + decimal(current.healingPerPulse()) + " each second and take "
+                    + decimal(current.damageReductionPercent()) + "% less combat damage."),
+            "Use to hold exposed ground; healing starts after one second and the area does not follow you.",
+            Map.of(Stat.WIS, BigInteger.valueOf(24), Stat.CHR, BigInteger.valueOf(20), Stat.CON, BigInteger.TEN), BigInteger.ONE,
+            AbilityDefinition.Activation.DELAYED, ControlInput.Gesture.USE, current.cooldown(),
+            Map.of("radius", BigDecimal.valueOf(current.radius()).stripTrailingZeros(),
+                "vertical-range", BigDecimal.valueOf(current.verticalRange()).stripTrailingZeros(),
+                "duration-seconds", nanos(current.duration()), "pulse-interval-seconds", nanos(current.pulseInterval()),
+                "healing-per-pulse", current.healingPerPulse(), "damage-reduction-percent", current.damageReductionPercent()),
+            AbilityDefinition.TargetPolicy.AREA, this);
+    }
+    @Override public boolean accepts(ControlInput input) { return !closed && input.target() == null; }
+    @Override public void activate(AbilityExecution execution) {
+        if (closed || !execution.stillCurrent()) return; new State(execution, from(execution.definition())).start();
+    }
+
+    private void completeHeal(State state, Target target, BigInteger expected, double accepted,
+                              java.util.Optional<CharacterRecord> saved, Throwable failure) {
+        try {
+            if (failure != null || saved == null || saved.isEmpty() || !state.execution.stillCurrent()
+                    || !state.recipientCurrent(target.player())) return;
+            var persisted = saved.orElseThrow();
+            if (!sessions.acknowledgeProgress(target.active(), expected, persisted)) return;
+            var attribute = target.player().getAttribute(Attribute.MAX_HEALTH); if (attribute == null) return;
+            double current = target.player().getHealth(), maximum = attribute.getValue();
+            double desired = Math.min(maximum, persisted.health().doubleValue()); double restored = Math.min(accepted, desired - current);
+            if (!Double.isFinite(current) || !Double.isFinite(maximum) || !Double.isFinite(restored) || restored <= 0) return;
+            target.player().setHealth(Math.min(maximum, current + restored));
+            if (target.player() != state.source) supports.accept(new MendingLight.Support(
+                state.execution.input().session().character(), target.active(), BigDecimal.valueOf(restored).stripTrailingZeros()));
+        } finally { completePending(state); }
+    }
+    private static void completePending(State state) {
+        if (state.pending > 0) state.pending--; if (state.expired && state.pending == 0) state.execution.finish();
+    }
+    private State owner(Player player) {
+        for (var state : List.copyOf(states)) if (!state.expired
+                && state.mitigation.containsKey(player.getUniqueId())) return state;
+        return null;
+    }
+    private boolean sameParty(Player source, Player target) {
+        var party = parties.partyOf(source.getUniqueId()).orElse(null);
+        return party != null && party.members().contains(target.getUniqueId());
+    }
+    private static boolean inside(Location origin, Player player, double radius, double vertical) {
+        try { var at = player.getLocation(); if (origin.getWorld() != at.getWorld()) return false;
+            double dx = at.getX() - origin.getX(), dz = at.getZ() - origin.getZ();
+            return dx * dx + dz * dz <= radius * radius && Math.abs(at.getY() - origin.getY()) <= vertical;
+        } catch (RuntimeException invalid) { return false; }
+    }
+    private static boolean unobstructed(Location origin, Player player) {
+        try { var world = origin.getWorld(); if (world == null) return false; var box = player.getBoundingBox();
+            var center = box.getCenter(); var offset = center.clone().subtract(origin.toVector()); double distance = offset.length();
+            if (!Double.isFinite(distance) || distance == 0) return distance == 0;
+            return world.rayTraceBlocks(origin, offset.multiply(1 / distance), distance, org.bukkit.FluidCollisionMode.NEVER, true) == null;
+        } catch (RuntimeException invalid) { return false; }
+    }
+    private static double distance(Location origin, Player player) {
+        try { var at = player.getLocation(); if (origin.getWorld() != at.getWorld()) return Double.POSITIVE_INFINITY;
+            double dx = at.getX() - origin.getX(), dz = at.getZ() - origin.getZ(); return dx * dx + dz * dz;
+        } catch (RuntimeException invalid) { return Double.POSITIVE_INFINITY; }
+    }
+    private static Settings from(AbilityDefinition definition) { var p = definition.parameters();
+        return new Settings(definition.cooldown(), p.get("radius").doubleValue(), p.get("vertical-range").doubleValue(),
+            duration(p.get("duration-seconds")), duration(p.get("pulse-interval-seconds")),
+            p.get("healing-per-pulse"), p.get("damage-reduction-percent")); }
+    private static Duration duration(BigDecimal seconds) { return Duration.ofNanos(seconds.movePointRight(9).longValueExact()); }
+    private static BigDecimal nanos(Duration value) { return BigDecimal.valueOf(value.toNanos()).movePointLeft(9); }
+    private static String seconds(Duration value) { return decimal(nanos(value)); }
+    private static String decimal(double value) { return decimal(BigDecimal.valueOf(value)); }
+    private static String decimal(BigDecimal value) { return value.stripTrailingZeros().toPlainString(); }
+    @Override public void close() {
+        if (closed) return; closed = true; for (var state : List.copyOf(states)) { state.close(); state.execution.finish(); } states.clear();
+    }
+}

src/main/java/games/dmg/fantasystick/ability/SecondWind.java

@@ -0,0 +1,115 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.persistence.CharacterStorage;
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+import org.bukkit.Material;
+import org.bukkit.attribute.Attribute;
+import org.bukkit.event.entity.EntityRegainHealthEvent;
+
+/** Second Wind's validated persist-before-publication self-heal. */
+public final class SecondWind implements AbilityEffect {
+    public record Settings(BigInteger baseHealing, Duration cooldown) {
+        public Settings {
+            Objects.requireNonNull(baseHealing); Objects.requireNonNull(cooldown);
+            if (baseHealing.signum() < 0 || baseHealing.compareTo(BigDecimal.valueOf(Double.MAX_VALUE).toBigInteger()) > 0
+                    || cooldown.isNegative() || cooldown.compareTo(Duration.ofDays(365)) > 0) {
+                throw new IllegalArgumentException("Invalid Second Wind settings");
+            }
+        }
+        public static Settings defaults() { return new Settings(BigInteger.valueOf(6), Duration.ofSeconds(15)); }
+    }
+
+    private final CharacterStorage characters;
+    private final EquipmentSessions sessions;
+    private final Consumer<Runnable> nextTick;
+    private final Consumer<EntityRegainHealthEvent> healingEvents;
+    private final Supplier<BigDecimal> nativeLimit;
+    private volatile Settings settings;
+
+    public SecondWind(Settings settings, CharacterStorage characters, EquipmentSessions sessions,
+                      Consumer<Runnable> nextTick, Consumer<EntityRegainHealthEvent> healingEvents,
+                      Supplier<BigDecimal> nativeLimit) {
+        this.settings = Objects.requireNonNull(settings); this.characters = Objects.requireNonNull(characters);
+        this.sessions = Objects.requireNonNull(sessions); this.nextTick = Objects.requireNonNull(nextTick);
+        this.healingEvents = Objects.requireNonNull(healingEvents); this.nativeLimit = Objects.requireNonNull(nativeLimit);
+    }
+    public void configure(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+
+    public AbilityDefinition definition() {
+        var current = settings;
+        return new AbilityDefinition("second_wind", "Second Wind", Material.GHAST_TEAR,
+            List.of("Restore missing fantasy health.",
+                "Heals " + current.baseHealing() + " + WIS modifier, capped at maximum health."),
+            "Use while injured; full health refuses without spending cooldown.",
+            Map.of(Stat.CON, BigInteger.valueOf(12), Stat.WIS, BigInteger.valueOf(12)), BigInteger.ONE,
+            AbilityDefinition.Activation.DELAYED, ControlInput.Gesture.USE, current.cooldown(),
+            Map.of("base-healing", new BigDecimal(current.baseHealing())),
+            AbilityDefinition.TargetPolicy.SELF, this);
+    }
+
+    @Override public boolean accepts(ControlInput input) {
+        double health = input.player().getHealth();
+        var attribute = input.player().getAttribute(Attribute.MAX_HEALTH);
+        return attribute != null && Double.isFinite(health) && health >= 0
+            && Double.isFinite(attribute.getValue()) && health < attribute.getValue();
+    }
+
+    public static BigInteger healing(BigInteger wisdom) { return healing(BigInteger.valueOf(6), wisdom); }
+    static BigInteger healing(BigInteger base, BigInteger wisdom) {
+        Objects.requireNonNull(base); Objects.requireNonNull(wisdom);
+        if (base.signum() < 0 || wisdom.signum() < 0) throw new IllegalArgumentException("Invalid Second Wind healing input");
+        BigInteger delta = wisdom.subtract(BigInteger.TEN); BigInteger[] divided = delta.divideAndRemainder(BigInteger.TWO);
+        BigInteger modifier = divided[0];
+        if (delta.signum() < 0 && divided[1].signum() != 0) modifier = modifier.subtract(BigInteger.ONE);
+        return base.add(modifier);
+    }
+
+    @Override public void activate(AbilityExecution execution) {
+        if (!execution.stillCurrent()) return;
+        var definition = execution.definition();
+        BigInteger base = definition.parameters().get("base-healing").toBigIntegerExact();
+        var player = execution.input().player();
+        var attribute = player.getAttribute(Attribute.MAX_HEALTH);
+        if (attribute == null) { execution.finish(); return; }
+        double current = player.getHealth(); double maximum = attribute.getValue();
+        double missing = maximum - current;
+        if (!Double.isFinite(current) || !Double.isFinite(maximum) || missing <= 0) { execution.finish(); return; }
+        BigInteger exact = healing(base, execution.character().stats().get(Stat.WIS));
+        double proposed = exact.bitLength() > 1023 ? missing : Math.min(missing, exact.doubleValue());
+        if (!Double.isFinite(proposed) || proposed <= 0) { execution.finish(); return; }
+        var event = new EntityRegainHealthEvent(player, proposed, EntityRegainHealthEvent.RegainReason.CUSTOM);
+        healingEvents.accept(event);
+        double accepted = Math.min(missing, event.getAmount());
+        if (event.isCancelled() || !Double.isFinite(accepted) || accepted <= 0) { execution.finish(); return; }
+        var record = execution.character(); var expected = record.revision();
+        BigDecimal target = BigDecimal.valueOf(current + accepted);
+        BigDecimal limit = nativeLimit.get();
+        characters.saveHealth(record.id(), expected, target, limit).whenComplete((saved, failure) -> {
+            try {
+                nextTick.accept(() -> {
+                    try {
+                        if (failure != null || saved == null || saved.isEmpty() || !execution.stillCurrent()) {
+                            player.sendMessage("Second Wind health could not be saved; no healing was applied."); return;
+                        }
+                        var persisted = saved.orElseThrow();
+                        if (!sessions.acknowledgeProgress(execution.input().session(), expected, persisted)) {
+                            player.sendMessage("Second Wind was saved, but the session changed; no native healing was applied."); return;
+                        }
+                        double publish = Math.min(attribute.getValue(), Math.max(player.getHealth(), persisted.health().doubleValue()));
+                        player.setHealth(publish);
+                    } finally { execution.finish(); }
+                });
+            } catch (RuntimeException rejected) { execution.finish(); }
+        });
+    }
+}

src/main/java/games/dmg/fantasystick/ability/ShieldBash.java

@@ -0,0 +1,144 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Consumer;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.damage.DamageSource;
+import org.bukkit.damage.DamageType;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDamageByEntityEvent;
+import org.bukkit.event.player.PlayerVelocityEvent;
+import org.bukkit.util.Vector;
+
+/** Shield Bash's contained short-range custom strike and post-damage knockback. */
+public final class ShieldBash implements AbilityEffect, Listener, AutoCloseable {
+    public record Settings(BigInteger baseDamage, Duration cooldown, double range,
+                           double horizontalKnockback, double minimumVerticalKnockback) {
+        public Settings {
+            Objects.requireNonNull(baseDamage); Objects.requireNonNull(cooldown);
+            if (baseDamage.signum() < 0 || cooldown.isNegative() || cooldown.compareTo(Duration.ofDays(365)) > 0
+                    || !Double.isFinite(range) || range <= 0 || range > 64
+                    || !Double.isFinite(horizontalKnockback) || horizontalKnockback < 0 || horizontalKnockback > 8
+                    || !Double.isFinite(minimumVerticalKnockback) || minimumVerticalKnockback < 0
+                    || minimumVerticalKnockback > 8) throw new IllegalArgumentException("Invalid Shield Bash settings");
+        }
+        public static Settings defaults() {
+            return new Settings(BigInteger.valueOf(4), Duration.ofSeconds(6), 3, 0.8, 0.35);
+        }
+    }
+    private static final class Attempt {
+        final AbilityExecution execution; final LivingEntity target; final Settings settings; boolean accepted;
+        Attempt(AbilityExecution execution, LivingEntity target, Settings settings) {
+            this.execution = execution; this.target = target; this.settings = settings;
+        }
+    }
+
+    private volatile Settings settings;
+    private final Consumer<PlayerVelocityEvent> velocityEvents;
+    private Attempt damaging;
+    private boolean closed;
+
+    public ShieldBash(Settings settings, Consumer<PlayerVelocityEvent> velocityEvents) {
+        this.settings = Objects.requireNonNull(settings); this.velocityEvents = Objects.requireNonNull(velocityEvents);
+    }
+    public void configure(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+
+    public AbilityDefinition definition() {
+        var current = settings;
+        return new AbilityDefinition("shield_bash", "Shield Bash", Material.SHIELD,
+            List.of("Strike within " + decimal(current.range()) + " blocks for " + current.baseDamage() + " + STR modifier damage.",
+                "Accepted damage adds knockback; this shield never enables ordinary blocking."),
+            "Attack a visible hostile at short range.", Map.of(Stat.STR, BigInteger.valueOf(12), Stat.CON, BigInteger.valueOf(12)),
+            BigInteger.ONE, AbilityDefinition.Activation.DELAYED, ControlInput.Gesture.ATTACK, current.cooldown(),
+            Map.of("base-damage", new BigDecimal(current.baseDamage()), "range", decimalValue(current.range()),
+                "horizontal-knockback", decimalValue(current.horizontalKnockback()),
+                "minimum-vertical-knockback", decimalValue(current.minimumVerticalKnockback())),
+            AbilityDefinition.TargetPolicy.HOSTILE, this);
+    }
+
+    @Override public boolean accepts(ControlInput input) {
+        return !closed && input.target() instanceof LivingEntity target && inRange(input.player(), target, settings.range());
+    }
+
+    public static BigInteger damage(BigInteger strength) { return damage(BigInteger.valueOf(4), strength); }
+    static BigInteger damage(BigInteger base, BigInteger strength) {
+        Objects.requireNonNull(base); Objects.requireNonNull(strength);
+        if (base.signum() < 0 || strength.signum() < 0) throw new IllegalArgumentException("Invalid Shield Bash damage input");
+        var delta = strength.subtract(BigInteger.TEN); var divided = delta.divideAndRemainder(BigInteger.TWO);
+        var modifier = divided[0];
+        if (delta.signum() < 0 && divided[1].signum() != 0) modifier = modifier.subtract(BigInteger.ONE);
+        return base.add(modifier);
+    }
+
+    @Override public void activate(AbilityExecution execution) {
+        if (closed || !execution.stillCurrent() || !(execution.input().target() instanceof LivingEntity target)) return;
+        var current = from(execution.definition()); var player = execution.input().player();
+        if (!inRange(player, target, current.range())) { execution.finish(); return; }
+        var exact = damage(current.baseDamage(), execution.character().stats().get(Stat.STR));
+        double amount = exact.bitLength() > 1023 ? Double.MAX_VALUE : exact.doubleValue();
+        if (!Double.isFinite(amount) || amount <= 0) { execution.finish(); return; }
+        var source = DamageSource.builder(DamageType.PLAYER_ATTACK).withCausingEntity(player).withDirectEntity(player).build();
+        var attempt = new Attempt(execution, target, current); damaging = attempt;
+        try { target.damage(amount, source); }
+        finally { if (damaging == attempt) damaging = null; execution.finish(); }
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void acceptedDamage(EntityDamageByEntityEvent event) {
+        var attempt = damaging;
+        if (closed || attempt == null || attempt.accepted || event.isCancelled() || event.getFinalDamage() <= 0
+                || !Double.isFinite(event.getFinalDamage()) || event.getDamager() != attempt.execution.input().player()
+                || event.getEntity() != attempt.target || !attempt.execution.stillCurrent()) return;
+        attempt.accepted = true;
+        attempt.execution.report(AbilityReport.Type.DAMAGE, event.getEntity(),
+            BigDecimal.valueOf(event.getFinalDamage()).stripTrailingZeros());
+        knockback(attempt);
+    }
+
+    private void knockback(Attempt attempt) {
+        var player = attempt.execution.input().player(); var target = attempt.target;
+        Vector away = target.getLocation().toVector().subtract(player.getLocation().toVector()); away.setY(0);
+        if (!finite(away) || away.lengthSquared() < 1.0e-12) return;
+        Vector current = target.getVelocity();
+        Vector proposed = current.clone().add(away.normalize().multiply(attempt.settings.horizontalKnockback()));
+        proposed.setY(Math.max(current.getY(), attempt.settings.minimumVerticalKnockback()));
+        if (!finite(proposed)) return;
+        if (target instanceof Player targetPlayer) {
+            var event = new PlayerVelocityEvent(targetPlayer, proposed.clone()); velocityEvents.accept(event);
+            if (event.isCancelled() || !finite(event.getVelocity())) return;
+            proposed = event.getVelocity().clone();
+        }
+        target.setVelocity(proposed);
+    }
+
+    private static boolean inRange(Player player, LivingEntity target, double range) {
+        try {
+            Location source = player.getLocation(); Location destination = target.getLocation();
+            return source.getWorld() == destination.getWorld() && source.distanceSquared(destination) <= range * range
+                && player.hasLineOfSight(target);
+        } catch (RuntimeException invalid) { return false; }
+    }
+    private static boolean finite(Vector value) {
+        return Double.isFinite(value.getX()) && Double.isFinite(value.getY()) && Double.isFinite(value.getZ());
+    }
+    private static Settings from(AbilityDefinition definition) {
+        var p = definition.parameters();
+        return new Settings(p.get("base-damage").toBigIntegerExact(), definition.cooldown(), p.get("range").doubleValue(),
+            p.get("horizontal-knockback").doubleValue(), p.get("minimum-vertical-knockback").doubleValue());
+    }
+    private static BigDecimal decimalValue(double value) { return BigDecimal.valueOf(value).stripTrailingZeros(); }
+    private static String decimal(double value) { return decimalValue(value).toPlainString(); }
+    @Override public void close() { closed = true; damaging = null; }
+}

src/main/java/games/dmg/fantasystick/ability/StoneSkin.java

@@ -0,0 +1,84 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import org.bukkit.Material;
+import org.bukkit.entity.Player;
+
+/** Stone Skin's captured, owned grant into the shared strongest-reduction stage. */
+public final class StoneSkin implements AbilityEffect, AutoCloseable {
+    public record Settings(Duration cooldown, Duration duration, BigDecimal reductionPercent) {
+        public Settings {
+            Objects.requireNonNull(cooldown); Objects.requireNonNull(duration); Objects.requireNonNull(reductionPercent);
+            if (cooldown.isNegative() || cooldown.compareTo(Duration.ofDays(365)) > 0
+                    || duration.isNegative() || duration.isZero() || duration.compareTo(Duration.ofDays(1)) > 0
+                    || reductionPercent.signum() < 0 || reductionPercent.compareTo(BigDecimal.valueOf(100)) > 0)
+                throw new IllegalArgumentException("Invalid Stone Skin settings");
+        }
+        public static Settings defaults() {
+            return new Settings(Duration.ofSeconds(14), Duration.ofSeconds(4), BigDecimal.valueOf(25));
+        }
+    }
+
+    private final class State implements AutoCloseable {
+        final AbilityExecution execution; final Player player; final AutoCloseable grant; boolean closed;
+        State(AbilityExecution execution, Player player, AutoCloseable grant) {
+            this.execution = execution; this.player = player; this.grant = grant;
+        }
+        @Override public void close() {
+            if (closed) return; closed = true; protections.remove(player.getUniqueId(), this);
+            try { grant.close(); } catch (Exception impossible) { throw new IllegalStateException(impossible); }
+        }
+    }
+
+    private volatile Settings settings;
+    private final CombatMitigation mitigation;
+    private final Map<UUID, State> protections = new java.util.HashMap<>();
+    private boolean closed;
+
+    public StoneSkin(Settings settings, CombatMitigation mitigation) {
+        this.settings = Objects.requireNonNull(settings); this.mitigation = Objects.requireNonNull(mitigation);
+    }
+    public void configure(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+
+    public AbilityDefinition definition() {
+        var current = settings;
+        return new AbilityDefinition("stone_skin", "Stone Skin", Material.BRICK,
+            List.of("Reduce entity and projectile combat damage by " + decimal(current.reductionPercent()) + "%.",
+                "Lasts " + decimal(BigDecimal.valueOf(current.duration().toMillis()).movePointLeft(3)) + " seconds without stacking."),
+            "Use to protect yourself; environmental damage is unchanged.", Map.of(Stat.CON, BigInteger.valueOf(14)), BigInteger.ONE,
+            AbilityDefinition.Activation.DELAYED, ControlInput.Gesture.USE, current.cooldown(),
+            Map.of("duration-seconds", BigDecimal.valueOf(current.duration().toNanos()).movePointLeft(9),
+                "damage-reduction-percent", current.reductionPercent()), AbilityDefinition.TargetPolicy.SELF, this);
+    }
+
+    @Override public void activate(AbilityExecution execution) {
+        if (closed || !execution.stillCurrent()) return;
+        var current = from(execution.definition()); var player = execution.input().player();
+        var grant = mitigation.grant(execution, player, current.reductionPercent());
+        var state = new State(execution, player, grant);
+        var previous = protections.put(player.getUniqueId(), state);
+        if (previous != null) previous.execution.finish();
+        execution.own(state); execution.later(current.duration(), execution::finish);
+    }
+
+    private static Settings from(AbilityDefinition definition) {
+        return new Settings(definition.cooldown(),
+            Duration.ofNanos(definition.parameters().get("duration-seconds").movePointRight(9).longValueExact()),
+            definition.parameters().get("damage-reduction-percent"));
+    }
+    private static String decimal(BigDecimal value) { return value.stripTrailingZeros().toPlainString(); }
+
+    @Override public void close() {
+        if (closed) return; closed = true;
+        for (var state : List.copyOf(protections.values())) state.execution.finish();
+        protections.clear();
+    }
+}

src/main/java/games/dmg/fantasystick/ability/TemporaryHealth.java

@@ -0,0 +1,33 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.party.PartyRoster;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import java.math.BigDecimal;
+import java.util.*;
+import java.util.function.Consumer;
+import org.bukkit.entity.*;
+import org.bukkit.event.*;
+import org.bukkit.event.entity.*;
+import org.bukkit.projectiles.ProjectileSource;
+
+/** Plugin-owned temporary-health ledger layered over unrelated native absorption. */
+public final class TemporaryHealth implements Listener,AutoCloseable{
+ public record Support(UUID target,UUID supportingCharacter,EquipmentSessions.Active aided,BigDecimal amount){}
+ private final class Grant implements AutoCloseable{final long sequence;final AbilityExecution execution;final Player target;double remaining;boolean closed;
+  Grant(AbilityExecution e,Player t,double amount){sequence=++sequences;execution=e;target=t;remaining=amount;}
+  @Override public void close(){if(closed)return;double before=owned(target.getUniqueId());closed=true;var list=grants.get(target.getUniqueId());if(list!=null){list.remove(this);if(list.isEmpty())grants.remove(target.getUniqueId());}double after=owned(target.getUniqueId());removeNative(target,Math.max(0,before-after));}}
+ private final EquipmentSessions sessions;private final PartyRoster parties;private final Consumer<Runnable> nextTick;private final Consumer<Support> supports;
+ private final Map<UUID,List<Grant>> grants=new HashMap<>();private long sequences;private boolean closed;
+ public TemporaryHealth(EquipmentSessions sessions,PartyRoster parties,Consumer<Runnable> nextTick,Consumer<Support> supports){this.sessions=Objects.requireNonNull(sessions);this.parties=Objects.requireNonNull(parties);this.nextTick=Objects.requireNonNull(nextTick);this.supports=Objects.requireNonNull(supports);}
+ public AutoCloseable grant(AbilityExecution execution,Player target,double amount){Objects.requireNonNull(execution);Objects.requireNonNull(target);if(closed||!Double.isFinite(amount)||amount<=0)throw new IllegalArgumentException("Invalid temporary health grant");double before=owned(target.getUniqueId());var grant=new Grant(execution,target,amount);grants.computeIfAbsent(target.getUniqueId(),ignored->new ArrayList<>()).add(grant);double after=owned(target.getUniqueId());addNative(target,Math.max(0,after-before));return grant;}
+ @EventHandler(priority=EventPriority.MONITOR,ignoreCancelled=true)public void damage(EntityDamageEvent event){if(closed||!(event.getEntity() instanceof Player target))return;var owner=strongest(target.getUniqueId());if(owner==null||!owner.execution.stillCurrent())return;double before=target.getAbsorptionAmount(),owned=owned(target.getUniqueId());if(!Double.isFinite(before)||before<=0||owned<=0)return;Entity attacker=event instanceof EntityDamageByEntityEvent by?attacker(by):null;var aided=sessions.active(target.getUniqueId()).orElse(null);boolean qualifies=aided!=null&&sessions.current(aided)&&!aided.character().equals(owner.execution.input().session().character())&&sameParty(owner.execution.input().player(),target);UUID enemy=attacker==null?null:attacker.getUniqueId();long ownerSequence=owner.sequence;UUID source=owner.execution.input().session().character();
+  try{nextTick.accept(()->consume(target,before,owned,ownerSequence,source,qualifies?aided:null,enemy));}catch(RuntimeException ignored){}}
+ private void consume(Player target,double before,double ownedBefore,long ownerSequence,UUID source,EquipmentSessions.Active aided,UUID enemy){if(closed)return;double after=target.getAbsorptionAmount();double consumed=Math.min(ownedBefore,Math.max(0,before-after));if(!Double.isFinite(consumed)||consumed<=0)return;var list=grants.get(target.getUniqueId());if(list==null)return;for(var grant:List.copyOf(list))grant.remaining=Math.max(0,grant.remaining-consumed);list.removeIf(g->g.closed||g.remaining<=1e-9);if(list.isEmpty())grants.remove(target.getUniqueId());if(aided!=null&&enemy!=null)supports.accept(new Support(enemy,source,aided,BigDecimal.valueOf(consumed).stripTrailingZeros()));}
+ private boolean sameParty(Player source,Player target){var a=parties.partyOf(source.getUniqueId()).orElse(null);var b=parties.partyOf(target.getUniqueId()).orElse(null);return a!=null&&b!=null&&a.id().equals(b.id());}
+ private Grant strongest(UUID target){Grant result=null;var list=grants.get(target);if(list!=null)for(var grant:List.copyOf(list))if(!grant.closed&&grant.remaining>0&&grant.execution.stillCurrent()&&(result==null||grant.remaining>result.remaining||grant.remaining==result.remaining&&grant.sequence>result.sequence))result=grant;return result;}
+ private double owned(UUID target){double result=0;var list=grants.get(target);if(list!=null)for(var grant:List.copyOf(list))if(!grant.closed&&grant.remaining>result)result=grant.remaining;return result;}
+ private static Entity attacker(EntityDamageByEntityEvent event){Entity causing=event.getDamageSource().getCausingEntity();if(causing!=null)return causing;if(event.getDamager() instanceof Projectile p){ProjectileSource shooter=p.getShooter();if(shooter instanceof Entity e)return e;}return event.getDamager();}
+ private static void addNative(Player target,double amount){if(amount<=0)return;double current=target.getAbsorptionAmount(),next=current+amount;if(!Double.isFinite(current)||current<0||!Double.isFinite(next))throw new IllegalStateException("Temporary health exceeds native range");target.setAbsorptionAmount(next);}
+ private static void removeNative(Player target,double amount){if(amount<=0)return;double current=target.getAbsorptionAmount();if(Double.isFinite(current)&&current>=0)target.setAbsorptionAmount(Math.max(0,current-amount));}
+ @Override public void close(){if(closed)return;for(var list:List.copyOf(grants.values()))for(var grant:List.copyOf(list))grant.close();closed=true;grants.clear();}
+}

src/main/java/games/dmg/fantasystick/ability/WarBanner.java

@@ -0,0 +1,241 @@
+package games.dmg.fantasystick.ability;
+
+import games.dmg.fantasystick.party.PartyRoster;
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.function.BooleanSupplier;
+import org.bukkit.Color;
+import org.bukkit.FluidCollisionMode;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.NamespacedKey;
+import org.bukkit.Particle;
+import org.bukkit.attribute.Attribute;
+import org.bukkit.attribute.AttributeInstance;
+import org.bukkit.attribute.AttributeModifier;
+import org.bukkit.block.BlockFace;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.Player;
+
+/** Fixed spectral War Banner cylinder with strongest damage and one owned knockback-resistance layer. */
+public final class WarBanner implements AbilityEffect, AutoCloseable {
+    public record Settings(Duration cooldown, double placementRange, double radius, double verticalRange,
+                           Duration duration, BigDecimal damageBonusPercent, BigDecimal knockbackResistancePercent) {
+        public Settings {
+            Objects.requireNonNull(cooldown); Objects.requireNonNull(duration);
+            Objects.requireNonNull(damageBonusPercent); Objects.requireNonNull(knockbackResistancePercent);
+            if (cooldown.isNegative() || cooldown.compareTo(Duration.ofDays(365)) > 0
+                    || !Double.isFinite(placementRange) || placementRange <= 0 || placementRange > 64
+                    || !Double.isFinite(radius) || radius <= 0 || radius > 64
+                    || !Double.isFinite(verticalRange) || verticalRange < 0 || verticalRange > 64
+                    || duration.isZero() || duration.isNegative() || duration.compareTo(Duration.ofDays(1)) > 0
+                    || damageBonusPercent.signum() < 0 || damageBonusPercent.compareTo(BigDecimal.valueOf(100)) > 0
+                    || knockbackResistancePercent.signum() < 0
+                    || knockbackResistancePercent.compareTo(BigDecimal.valueOf(100)) > 0) {
+                throw new IllegalArgumentException("Invalid War Banner settings");
+            }
+        }
+        public static Settings defaults() {
+            return new Settings(Duration.ofSeconds(45), 12, 8, 4, Duration.ofSeconds(10),
+                BigDecimal.valueOf(25), BigDecimal.valueOf(50));
+        }
+    }
+
+    private final class Area implements AutoCloseable {
+        final long sequence = ++sequences; final AbilityExecution execution; final Player source;
+        final Location origin; final Settings captured; final Map<UUID, Benefit> recipients = new LinkedHashMap<>();
+        boolean closed;
+        Area(AbilityExecution execution, Location origin, Settings captured) {
+            this.execution = execution; this.source = execution.input().player(); this.origin = origin; this.captured = captured;
+        }
+        void refresh() {
+            if (closed) return;
+            if (!sourceCurrent()) { execution.finish(); return; }
+            var eligible = candidates();
+            for (var entry : List.copyOf(recipients.entrySet())) if (!eligible.containsKey(entry.getKey())) entry.getValue().close();
+            for (var entry : eligible.entrySet()) recipients.computeIfAbsent(entry.getKey(), ignored -> new Benefit(this, entry.getValue()));
+            visual();
+        }
+        boolean sourceCurrent() {
+            return execution.stillCurrent() && sessions.active(source.getUniqueId())
+                .filter(active -> active.equals(execution.input().session()) && sessions.current(active)).isPresent();
+        }
+        boolean eligible(Player player) {
+            if (!sourceCurrent() || !inside(origin, player, captured.radius(), captured.verticalRange())
+                    || !unobstructed(origin, player)) return false;
+            var active = sessions.active(player.getUniqueId()).filter(sessions::current).orElse(null);
+            if (active == null) return false;
+            if (player == source) return active.equals(execution.input().session());
+            var sourceParty = parties.partyOf(source.getUniqueId()).orElse(null);
+            var targetParty = parties.partyOf(player.getUniqueId()).orElse(null);
+            return sourceParty != null && targetParty != null && sourceParty.id().equals(targetParty.id());
+        }
+        Map<UUID, Player> candidates() {
+            List<Entity> nearby;
+            try { nearby = new ArrayList<>(origin.getWorld().getNearbyEntities(origin,
+                captured.radius(), captured.verticalRange(), captured.radius())); }
+            catch (RuntimeException unavailable) { nearby = new ArrayList<>(); }
+            nearby.addFirst(source); var unique = new LinkedHashMap<UUID, Player>(); int inspected = 0;
+            for (var entity : nearby) {
+                if (++inspected > 256) break;
+                if (entity instanceof Player player && eligible(player)) unique.putIfAbsent(player.getUniqueId(), player);
+            }
+            var result = new ArrayList<>(unique.values());
+            result.sort(Comparator.comparingDouble((Player player) -> distance(origin, player)).thenComparing(Player::getUniqueId));
+            if (result.size() > 64) result.subList(64, result.size()).clear();
+            var ordered = new LinkedHashMap<UUID, Player>(); for (var player : result) ordered.put(player.getUniqueId(), player); return ordered;
+        }
+        void visual() {
+            try { origin.getWorld().spawnParticle(Particle.DUST, origin.clone().add(0, 1.5, 0), 16,
+                0.25, 1.5, 0.25, 0, new Particle.DustOptions(Color.RED, 1.5f)); }
+            catch (RuntimeException ignored) { }
+        }
+        @Override public void close() {
+            if (closed) return; closed = true; areas.remove(sequence, this);
+            for (var benefit : List.copyOf(recipients.values())) benefit.close(); recipients.clear();
+        }
+    }
+
+    private final class Benefit implements AutoCloseable {
+        final Area area; final Player player; final AutoCloseable bonus; final AutoCloseable resistance; boolean closed;
+        Benefit(Area area, Player player) {
+            this.area = area; this.player = player;
+            BooleanSupplier current = () -> !closed && area.eligible(player);
+            bonus = bonuses.grant(area.execution, player, area.captured.damageBonusPercent(), current);
+            resistance = resistance(player, area.captured.knockbackResistancePercent(), current);
+        }
+        @Override public void close() {
+            if (closed) return; closed = true; area.recipients.remove(player.getUniqueId(), this);
+            closeResource(bonus); closeResource(resistance);
+        }
+    }
+
+    private final class ResistanceGrant implements AutoCloseable {
+        final ResistanceState state; final long sequence = ++resistanceSequences; final BigDecimal percent;
+        final BooleanSupplier current; boolean closed;
+        ResistanceGrant(ResistanceState state, BigDecimal percent, BooleanSupplier current) {
+            this.state = state; this.percent = percent; this.current = current;
+        }
+        boolean valid() { try { return !closed && current.getAsBoolean(); } catch (RuntimeException invalid) { return false; } }
+        @Override public void close() { if (closed) return; closed = true; state.grants.remove(this); state.refresh(); }
+    }
+    private final class ResistanceState {
+        final Player player; final List<ResistanceGrant> grants = new ArrayList<>(); AttributeModifier owned;
+        ResistanceState(Player player) { this.player = player; }
+        void refresh() {
+            AttributeInstance attribute;
+            try { attribute = player.getAttribute(Attribute.KNOCKBACK_RESISTANCE); }
+            catch (RuntimeException unavailable) { return; }
+            if (attribute == null) return;
+            ResistanceGrant strongest = null;
+            for (var grant : List.copyOf(grants)) if (grant.valid() && (strongest == null
+                    || grant.percent.compareTo(strongest.percent) > 0
+                    || grant.percent.compareTo(strongest.percent) == 0 && grant.sequence < strongest.sequence)) strongest = grant;
+            double desired = strongest == null ? 0 : strongest.percent.movePointLeft(2).doubleValue();
+            if (owned != null && (!attribute.getModifiers().contains(owned) || Double.compare(owned.getAmount(), desired) != 0)) {
+                attribute.removeModifier(owned); owned = null;
+            }
+            if (strongest != null && owned == null) {
+                var key = new NamespacedKey("fantasystick", "war_banner_" + player.getUniqueId());
+                for (var modifier : List.copyOf(attribute.getModifiers())) if (modifier.getKey().equals(key)) attribute.removeModifier(modifier);
+                owned = new AttributeModifier(key, desired, AttributeModifier.Operation.ADD_NUMBER); attribute.addModifier(owned);
+            }
+            if (strongest == null) { resistances.remove(player.getUniqueId(), this); owned = null; }
+        }
+    }
+
+    private volatile Settings settings;
+    private final EquipmentSessions sessions; private final PartyRoster parties; private final OutgoingDamageBonus bonuses;
+    private final Map<Long, Area> areas = new java.util.HashMap<>(); private final Map<UUID, ResistanceState> resistances = new java.util.HashMap<>();
+    private long sequences; private long resistanceSequences; private org.bukkit.scheduler.BukkitTask sweepTask; private boolean closed;
+
+    public WarBanner(Settings settings, EquipmentSessions sessions, PartyRoster parties, OutgoingDamageBonus bonuses) {
+        this.settings = Objects.requireNonNull(settings); this.sessions = Objects.requireNonNull(sessions);
+        this.parties = Objects.requireNonNull(parties); this.bonuses = Objects.requireNonNull(bonuses);
+    }
+    public void configure(Settings settings) { this.settings = Objects.requireNonNull(settings); }
+    public void install(org.bukkit.plugin.Plugin plugin) {
+        Objects.requireNonNull(plugin); if (closed || sweepTask != null) throw new IllegalStateException("War Banner sweep already installed or closed");
+        sweepTask = plugin.getServer().getScheduler().runTaskTimer(plugin, this::sweep, 1, 1);
+    }
+    public void sweep() {
+        if (closed) return; int checked = 0;
+        for (var area : List.copyOf(areas.values())) { area.refresh(); if (++checked == 64) break; }
+        for (var state : List.copyOf(resistances.values())) state.refresh();
+    }
+    public AbilityDefinition definition() {
+        var current = settings;
+        return new AbilityDefinition("war_banner", "War Banner", Material.RED_BANNER,
+            List.of("Plant a spectral banner within " + decimal(current.placementRange()) + " blocks for " + seconds(current.duration()) + " seconds.",
+                "Party members in its " + decimal(current.radius()) + "-block area gain " + decimal(current.damageBonusPercent())
+                    + "% combat damage and " + decimal(current.knockbackResistancePercent()) + "% knockback resistance."),
+            "Use while looking at the solid top surface where the fixed banner should stand; copies do not stack.",
+            Map.of(Stat.STR, BigInteger.valueOf(22), Stat.CHR, BigInteger.valueOf(22), Stat.CON, BigInteger.valueOf(12)), BigInteger.ONE,
+            AbilityDefinition.Activation.DELAYED, ControlInput.Gesture.USE, current.cooldown(),
+            Map.of("placement-range", BigDecimal.valueOf(current.placementRange()).stripTrailingZeros(),
+                "radius", BigDecimal.valueOf(current.radius()).stripTrailingZeros(),
+                "vertical-range", BigDecimal.valueOf(current.verticalRange()).stripTrailingZeros(),
+                "duration-seconds", nanos(current.duration()), "damage-bonus-percent", current.damageBonusPercent(),
+                "knockback-resistance-percent", current.knockbackResistancePercent()), AbilityDefinition.TargetPolicy.AREA, this);
+    }
+    @Override public boolean accepts(ControlInput input) {
+        return !closed && input.target() == null && placement(input.player(), settings.placementRange()) != null;
+    }
+    @Override public void activate(AbilityExecution execution) {
+        if (closed || !execution.stillCurrent()) return; var captured = from(execution.definition());
+        var origin = placement(execution.input().player(), captured.placementRange());
+        if (origin == null) { execution.finish(); return; }
+        var area = new Area(execution, origin, captured); areas.put(area.sequence, area); execution.own(area);
+        area.refresh(); execution.later(captured.duration(), execution::finish);
+    }
+
+    private AutoCloseable resistance(Player player, BigDecimal percent, BooleanSupplier current) {
+        var state = resistances.computeIfAbsent(player.getUniqueId(), ignored -> new ResistanceState(player));
+        var grant = new ResistanceGrant(state, percent, current); state.grants.add(grant); state.refresh(); return grant;
+    }
+    private static Location placement(Player player, double range) {
+        try { var eye = player.getEyeLocation(); var hit = player.getWorld().rayTraceBlocks(eye, eye.getDirection(), range,
+                FluidCollisionMode.NEVER, true);
+            if (hit == null || hit.getHitBlock() == null || hit.getHitBlockFace() != BlockFace.UP
+                    || !hit.getHitBlock().getType().isSolid()) return null;
+            return hit.getHitBlock().getLocation().add(0.5, 1, 0.5);
+        } catch (RuntimeException invalid) { return null; }
+    }
+    private static boolean inside(Location origin, Player player, double radius, double vertical) {
+        try { var at = player.getLocation(); if (origin.getWorld() != at.getWorld()) return false;
+            double dx=at.getX()-origin.getX(), dz=at.getZ()-origin.getZ();
+            return dx*dx+dz*dz<=radius*radius && Math.abs(at.getY()-origin.getY())<=vertical;
+        } catch (RuntimeException invalid) { return false; }
+    }
+    private static boolean unobstructed(Location origin, Player player) {
+        try { var world=origin.getWorld(); if(world==null)return false;var offset=player.getBoundingBox().getCenter().subtract(origin.toVector());
+            double distance=offset.length();if(!Double.isFinite(distance)||distance==0)return distance==0;
+            return world.rayTraceBlocks(origin,offset.multiply(1/distance),distance,FluidCollisionMode.NEVER,true)==null;
+        } catch(RuntimeException invalid){return false;}
+    }
+    private static double distance(Location origin, Player player) {
+        try { var at=player.getLocation();if(origin.getWorld()!=at.getWorld())return Double.POSITIVE_INFINITY;
+            double dx=at.getX()-origin.getX(),dz=at.getZ()-origin.getZ();return dx*dx+dz*dz;
+        } catch(RuntimeException invalid){return Double.POSITIVE_INFINITY;}
+    }
+    private static Settings from(AbilityDefinition definition) { var p=definition.parameters();return new Settings(definition.cooldown(),
+        p.get("placement-range").doubleValue(),p.get("radius").doubleValue(),p.get("vertical-range").doubleValue(),
+        Duration.ofNanos(p.get("duration-seconds").movePointRight(9).longValueExact()),p.get("damage-bonus-percent"),p.get("knockback-resistance-percent")); }
+    private static BigDecimal nanos(Duration value){return BigDecimal.valueOf(value.toNanos()).movePointLeft(9);}
+    private static String seconds(Duration value){return decimal(nanos(value));}
+    private static String decimal(double value){return decimal(BigDecimal.valueOf(value));}
+    private static String decimal(BigDecimal value){return value.stripTrailingZeros().toPlainString();}
+    private static void closeResource(AutoCloseable resource){try{resource.close();}catch(Exception impossible){throw new IllegalStateException(impossible);}}
+    @Override public void close(){if(closed)return;closed=true;if(sweepTask!=null)sweepTask.cancel();for(var area:List.copyOf(areas.values()))area.execution.finish();areas.clear();for(var state:List.copyOf(resistances.values())){for(var grant:List.copyOf(state.grants))grant.close();}resistances.clear();}
+}

src/main/java/games/dmg/fantasystick/book/BookPagination.java

@@ -9,6 +9,15 @@ public final class BookPagination {
     private BookPagination() { }
 
     public static List<Component> pages(String text) {
+        var lines = lines(text);
+        var pages = new ArrayList<Component>();
+        for (int start = 0; start < lines.size(); start += 13) {
+            pages.add(Component.text(String.join("\n", lines.subList(start, Math.min(start + 13, lines.size())))));
+        }
+        return List.copyOf(pages);
+    }
+
+    static List<String> lines(String text) {
         var lines = new ArrayList<String>();
         var line = new StringBuilder();
         int width = 0;
@@ -28,10 +37,6 @@ public final class BookPagination {
             line.appendCodePoint(codePoint); width += advance;
         }
         lines.add(line.toString());
-        var pages = new ArrayList<Component>();
-        for (int start = 0; start < lines.size(); start += 13) {
-            pages.add(Component.text(String.join("\n", lines.subList(start, Math.min(start + 13, lines.size())))));
-        }
-        return List.copyOf(pages);
+        return List.copyOf(lines);
     }
 }

src/main/java/games/dmg/fantasystick/book/CharacterBookController.java

@@ -16,30 +16,56 @@ import org.bukkit.Material;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.BookMeta;
 
-/** Authoritative inspection and validated party controls; character mutation actions remain unfinished. */
+/** Authoritative inspection, permanent-stat purchases and validated party controls. */
 public final class CharacterBookController implements Consumer<ControlInput>, AutoCloseable, org.bukkit.event.Listener {
     public record Failure(UUID player, UUID character, Throwable cause) { }
     private final CharacterStorage characters;
     private final ProgressionRules rules;
+    private final games.dmg.fantasystick.session.EquipmentSessions sessions;
     private final PartyBookControls partyControls;
     private final Consumer<Runnable> nextTick;
     private final Consumer<Failure> failures;
+    private final games.dmg.fantasystick.ability.AbilityRegistry abilities;
+    private final games.dmg.fantasystick.ability.AbilityEngine abilityEngine;
     private final Map<UUID, Object> pending = new ConcurrentHashMap<>();
     private volatile boolean closed;
-    private static final int VOLUME_SIZE = 80; // Leave room for navigation and the bounded party pages.
+    private static final int VOLUME_SIZE = 30; // Reserve room for linked ability details, navigation and party pages.
     private static final net.kyori.adventure.key.Key PAGES = net.kyori.adventure.key.Key.key("fantasystick", "character_pages");
+    private static final net.kyori.adventure.key.Key STATS = net.kyori.adventure.key.Key.key("fantasystick", "character_stat");
+    private static final net.kyori.adventure.key.Key ABILITY_UNLOCK = net.kyori.adventure.key.Key.key("fantasystick", "ability_unlock");
+    private static final net.kyori.adventure.key.Key ABILITY_UNLEARN = net.kyori.adventure.key.Key.key("fantasystick", "ability_unlearn");
     private static final java.util.regex.Pattern PAGE_PAYLOAD = java.util.regex.Pattern.compile("\"([a-f0-9-]{36}):([01])\"");
+    private static final java.util.regex.Pattern STAT_PAYLOAD = java.util.regex.Pattern.compile("\"([a-f0-9-]{36}):(STR|DEX|CON|INT|WIS|CHR)\"");
+    private static final java.util.regex.Pattern ABILITY_PAYLOAD = java.util.regex.Pattern.compile("\"([a-f0-9-]{36}):([a-z][a-z0-9_]{0,63})\"");
     private record View(String nonce, ControlInput input, int previous, int next) { }
+    private record StatView(String nonce, ControlInput input, java.math.BigInteger revision) { }
+    private record AbilityView(String nonce, ControlInput input, java.math.BigInteger revision, java.util.Set<String> ids) { }
     private final Map<UUID, View> views = new ConcurrentHashMap<>();
+    private final Map<UUID, StatView> statViews = new ConcurrentHashMap<>();
+    private final Map<UUID, AbilityView> abilityViews = new ConcurrentHashMap<>();
 
     /** Scheduler must always defer to the server thread. Diagnostics must not access players or throw. */
     public CharacterBookController(CharacterStorage characters, ProgressionRules rules,
+                                   games.dmg.fantasystick.session.EquipmentSessions sessions,
                                    Consumer<Runnable> nextTick, Consumer<Failure> failures, games.dmg.fantasystick.party.PartyRoster parties,
                                    org.bukkit.Server server, java.util.function.Function<UUID, Component> names) {
+        this(characters, rules, sessions, nextTick, failures, parties, server, names,
+            new games.dmg.fantasystick.ability.AbilityRegistry(), null);
+    }
+
+    public CharacterBookController(CharacterStorage characters, ProgressionRules rules,
+                                   games.dmg.fantasystick.session.EquipmentSessions sessions,
+                                   Consumer<Runnable> nextTick, Consumer<Failure> failures, games.dmg.fantasystick.party.PartyRoster parties,
+                                   org.bukkit.Server server, java.util.function.Function<UUID, Component> names,
+                                   games.dmg.fantasystick.ability.AbilityRegistry abilities,
+                                   games.dmg.fantasystick.ability.AbilityEngine abilityEngine) {
         this.characters = Objects.requireNonNull(characters);
         this.rules = Objects.requireNonNull(rules);
+        this.sessions = Objects.requireNonNull(sessions);
         this.nextTick = Objects.requireNonNull(nextTick);
         this.failures = Objects.requireNonNull(failures);
+        this.abilities = Objects.requireNonNull(abilities);
+        this.abilityEngine = abilityEngine;
         this.partyControls = new PartyBookControls(parties, server, names, this::accept, this::report);
     }
 
@@ -51,6 +77,8 @@ public final class CharacterBookController implements Consumer<ControlInput>, Au
         var owner = input.session().player();
         partyControls.forget(owner);
         views.remove(owner);
+        statViews.remove(owner);
+        abilityViews.remove(owner);
         Object ticket = new Object();
         pending.put(owner, ticket);
         characters.find(input.session().character()).whenComplete((record, failure) -> {
@@ -78,29 +106,47 @@ public final class CharacterBookController implements Consumer<ControlInput>, Au
     }
 
     private ItemStack render(CharacterRecord record, ControlInput input, int offset) {
-        var first = new StringBuilder(record.name()).append("\n\n");
-        for (var stat : Stat.values()) first.append(stat).append(": ").append(record.stats().get(stat)).append('\n');
-        var maximum = record.maximumHealth().min(NativeHealthLimit.read());
-        String xp = record.level() >= rules.maximumLevel() ? "MAX"
-            : record.experience().remainder(rules.xpPerLevel()) + "/" + rules.xpPerLevel();
-        String learned = record.learned().isEmpty() ? "none" : String.join(", ", record.learned().stream().sorted().toList());
-        String second = "Level: " + record.level() + "\nXP: " + xp + "\nUnspent points: " + record.unspentPoints()
-            + "\nHealth: " + java.math.BigDecimal.valueOf(input.player().getHealth()).min(maximum).stripTrailingZeros().toPlainString()
-            + "/" + maximum.stripTrailingZeros().toPlainString()
-            + "\n\nAbilities: " + learned;
         var item = new ItemStack(Material.WRITTEN_BOOK);
         var meta = (BookMeta) item.getItemMeta();
         meta.setTitle("Character");
         meta.setAuthor("Fantasy Stick");
-        var all = BookPagination.pages(first + "\n" + second);
-        int start = Math.min(offset, (all.size() - 1) / VOLUME_SIZE * VOLUME_SIZE);
-        int end = Math.min(start + VOLUME_SIZE, all.size());
-        var pages = new java.util.ArrayList<Component>(all.subList(start, end));
-        if (all.size() > VOLUME_SIZE) {
+
+        var statView = new StatView(UUID.randomUUID().toString(), input, record.revision());
+        var allOverview = overviewPages(record, input, statView);
+        int start = Math.min(offset, (allOverview.size() - 1) / VOLUME_SIZE * VOLUME_SIZE);
+        int end = Math.min(start + VOLUME_SIZE, allOverview.size());
+        var pages = new java.util.ArrayList<Component>(allOverview.subList(start, end));
+        if (record.unspentPoints().signum() > 0 && start == 0) statViews.put(input.session().player(), statView);
+
+        var definitions = abilities.definitions().stream()
+            .sorted(java.util.Comparator.comparing(games.dmg.fantasystick.ability.AbilityDefinition::name)
+                .thenComparing(games.dmg.fantasystick.ability.AbilityDefinition::id))
+            .toList();
+        if (!definitions.isEmpty() && end == allOverview.size()) {
+            var abilityView = new AbilityView(UUID.randomUUID().toString(), input, record.revision(),
+                definitions.stream().map(games.dmg.fantasystick.ability.AbilityDefinition::id)
+                    .collect(java.util.stream.Collectors.toUnmodifiableSet()));
+            abilityViews.put(input.session().player(), abilityView);
+            var details = definitions.stream().map(definition -> abilityPages(record, definition, abilityView)).toList();
+            var placeholderTargets = definitions.stream().collect(java.util.stream.Collectors.toMap(
+                games.dmg.fantasystick.ability.AbilityDefinition::id, ignored -> 1));
+            int activeCount = activePages(record, definitions, placeholderTargets).size();
+            int indexCount = indexPages(definitions, placeholderTargets).size();
+            var targets = new java.util.HashMap<String, Integer>();
+            int target = pages.size() + activeCount + indexCount + 1;
+            for (int index = 0; index < definitions.size(); index++) {
+                targets.put(definitions.get(index).id(), target);
+                target += details.get(index).size();
+            }
+            pages.addAll(activePages(record, definitions, targets));
+            pages.addAll(indexPages(definitions, targets));
+            details.forEach(pages::addAll);
+        }
+        if (allOverview.size() > VOLUME_SIZE) {
             var view = new View(UUID.randomUUID().toString(), input, start > 0 ? start - VOLUME_SIZE : -1,
-                end < all.size() ? end : -1);
+                end < allOverview.size() ? end : -1);
             views.put(input.session().player(), view);
-            Component navigation = Component.text("Character pages\n\n" + (start + 1) + "–" + end + "/" + all.size());
+            Component navigation = Component.text("Character pages\n\n" + (start + 1) + "–" + end + "/" + allOverview.size());
             if (view.previous() >= 0) navigation = navigation.append(Component.newline()).append(pageButton("Previous pages", view, 0));
             if (view.next() >= 0) navigation = navigation.append(Component.newline()).append(pageButton("Next pages", view, 1));
             pages.add(navigation);
@@ -111,6 +157,157 @@ public final class CharacterBookController implements Consumer<ControlInput>, Au
         return item;
     }
 
+    private java.util.List<Component> overviewPages(CharacterRecord record, ControlInput input, StatView view) {
+        var builder = new PageBuilder();
+        builder.text(record.name());
+        builder.blank();
+        for (var stat : Stat.values()) {
+            Component action = record.unspentPoints().signum() > 0
+                ? statButton(stat, view) : null;
+            builder.inline(stat + ": " + record.stats().get(stat), action);
+        }
+        var maximum = record.maximumHealth().min(NativeHealthLimit.read());
+        String xp = record.level() >= rules.maximumLevel() ? "MAX"
+            : record.experience().remainder(rules.xpPerLevel()) + "/" + rules.xpPerLevel();
+        builder.text("Level: " + record.level());
+        builder.text("XP: " + xp);
+        builder.text("Unspent points: " + record.unspentPoints());
+        builder.text("Health: " + java.math.BigDecimal.valueOf(input.player().getHealth()).min(maximum).stripTrailingZeros().toPlainString()
+            + "/" + maximum.stripTrailingZeros().toPlainString());
+        return builder.pages();
+    }
+
+    private static Component statButton(Stat stat, StatView view) {
+        return Component.text("[+1 " + stat + "]", net.kyori.adventure.text.format.NamedTextColor.DARK_GREEN)
+            .clickEvent(net.kyori.adventure.text.event.ClickEvent.custom(STATS,
+                net.kyori.adventure.nbt.api.BinaryTagHolder.binaryTagHolder("\"" + view.nonce() + ":" + stat + "\"")));
+    }
+
+    private static java.util.List<Component> activePages(CharacterRecord record,
+            java.util.List<games.dmg.fantasystick.ability.AbilityDefinition> definitions, Map<String, Integer> targets) {
+        var byId = definitions.stream().collect(java.util.stream.Collectors.toMap(
+            games.dmg.fantasystick.ability.AbilityDefinition::id, java.util.function.Function.identity()));
+        var builder = new PageBuilder();
+        builder.text("Active abilities"); builder.blank();
+        for (int slot = 0; slot < record.loadout().size(); slot++) {
+            String id = record.loadout().get(slot);
+            var definition = byId.get(id);
+            if (id.isEmpty()) builder.text((slot + 3) + ": No Ability");
+            else if (definition == null) builder.text((slot + 3) + ": " + id);
+            else builder.link((slot + 3) + ": ", definition.name(), targets.get(id));
+        }
+        var unassigned = record.learned().stream().filter(id -> !record.loadout().contains(id)).sorted().toList();
+        if (!unassigned.isEmpty()) {
+            builder.blank(); builder.text("Unassigned learned:");
+            for (var id : unassigned) {
+                var definition = byId.get(id);
+                if (definition == null) builder.text(id);
+                else builder.link("", definition.name(), targets.get(id));
+            }
+        }
+        return builder.pages();
+    }
+
+    private static java.util.List<Component> indexPages(
+            java.util.List<games.dmg.fantasystick.ability.AbilityDefinition> definitions, Map<String, Integer> targets) {
+        var pages = new java.util.ArrayList<Component>();
+        for (int start = 0; start < definitions.size(); start += 11) {
+            var builder = new PageBuilder(); builder.text("Ability index"); builder.blank();
+            for (var definition : definitions.subList(start, Math.min(start + 11, definitions.size()))) {
+                builder.link("", definition.name(), targets.get(definition.id()));
+            }
+            pages.addAll(builder.pages());
+        }
+        return java.util.List.copyOf(pages);
+    }
+
+    private static java.util.List<Component> abilityPages(CharacterRecord record,
+            games.dmg.fantasystick.ability.AbilityDefinition definition, AbilityView view) {
+        String requirements = definition.requirements().isEmpty() ? "none" : definition.requirements().entrySet().stream()
+            .sorted(Map.Entry.comparingByKey()).map(entry -> entry.getKey() + " " + entry.getValue())
+            .collect(java.util.stream.Collectors.joining(", "));
+        boolean learned = record.learned().contains(definition.id());
+        boolean stats = definition.requirements().entrySet().stream()
+            .allMatch(entry -> record.stats().get(entry.getKey()).compareTo(entry.getValue()) >= 0);
+        boolean points = record.unspentPoints().compareTo(definition.pointCost()) >= 0;
+        boolean slot = record.loadout().contains("");
+        String state = learned ? "Learned" : !stats ? "Unavailable: requirements"
+            : !points ? "Unavailable: points" : !slot ? "Unavailable: slots" : "Available";
+        var builder = new PageBuilder();
+        builder.text(definition.name());
+        builder.text(requirements);
+        if (learned) builder.component(abilityButton("Unlearn", ABILITY_UNLEARN, view, definition.id()));
+        else if (stats && points && slot) builder.component(abilityButton("Learn", ABILITY_UNLOCK, view, definition.id()));
+        else builder.text(state);
+        builder.blank();
+        definition.lore().forEach(builder::text);
+        builder.blank(); builder.text(definition.instructions());
+        builder.text("Cooldown: " + durationSeconds(definition.cooldown()) + "s");
+        if (!definition.parameters().isEmpty()) builder.text("Parameters: " + definition.parameters().entrySet().stream()
+            .sorted(Map.Entry.comparingByKey()).map(entry -> entry.getKey() + "=" + entry.getValue())
+            .collect(java.util.stream.Collectors.joining(", ")));
+        builder.text(state);
+        return builder.pages();
+    }
+
+    private static final class PageBuilder {
+        private final java.util.List<Component> lines = new java.util.ArrayList<>();
+        void blank() { lines.add(Component.empty()); }
+        void text(String text) { BookPagination.lines(text).forEach(line -> lines.add(Component.text(line))); }
+        void component(Component component) { lines.add(component); }
+        void inline(String text, Component action) {
+            var wrapped = BookPagination.lines(text);
+            for (int index = 0; index < wrapped.size() - 1; index++) lines.add(Component.text(wrapped.get(index)));
+            var last = Component.text(wrapped.getLast());
+            if (action != null && displayWidth(wrapped.getLast()) + 6 + 48 <= 108) {
+                lines.add(last.append(Component.space()).append(action));
+            } else {
+                lines.add(last);
+                if (action != null) lines.add(action);
+            }
+        }
+        void link(String prefix, String label, int page) {
+            if (displayWidth(prefix + label) <= 108) {
+                lines.add(Component.text(prefix).append(Component.text(label, net.kyori.adventure.text.format.NamedTextColor.DARK_BLUE)
+                    .clickEvent(net.kyori.adventure.text.event.ClickEvent.changePage(page))));
+                return;
+            }
+            for (var part : BookPagination.lines(prefix + label)) {
+                lines.add(Component.text(part, net.kyori.adventure.text.format.NamedTextColor.DARK_BLUE)
+                    .clickEvent(net.kyori.adventure.text.event.ClickEvent.changePage(page)));
+            }
+        }
+        private static int displayWidth(String text) {
+            return text.codePoints().map(codePoint -> codePoint < 128 ? 6 : 9).sum();
+        }
+        java.util.List<Component> pages() {
+            var pages = new java.util.ArrayList<Component>();
+            for (int start = 0; start < lines.size(); start += 13) {
+                Component page = Component.empty();
+                for (int index = start; index < Math.min(start + 13, lines.size()); index++) {
+                    if (index > start) page = page.append(Component.newline());
+                    page = page.append(lines.get(index));
+                }
+                pages.add(page);
+            }
+            if (pages.isEmpty()) pages.add(Component.empty());
+            return java.util.List.copyOf(pages);
+        }
+    }
+
+    private static String durationSeconds(java.time.Duration duration) {
+        return java.math.BigDecimal.valueOf(duration.getSeconds())
+            .add(java.math.BigDecimal.valueOf(duration.getNano(), 9)).stripTrailingZeros().toPlainString();
+    }
+
+    private static Component abilityButton(String label, net.kyori.adventure.key.Key action, AbilityView view,
+                                           String ability) {
+        String payload = "\"" + view.nonce() + ":" + ability + "\"";
+        return Component.text("[" + label + "]", net.kyori.adventure.text.format.NamedTextColor.DARK_GREEN)
+            .clickEvent(net.kyori.adventure.text.event.ClickEvent.custom(action,
+                net.kyori.adventure.nbt.api.BinaryTagHolder.binaryTagHolder(payload)));
+    }
+
     private static Component pageButton(String label, View view, int direction) {
         return Component.text("[" + label + "]", net.kyori.adventure.text.format.NamedTextColor.DARK_BLUE)
             .clickEvent(net.kyori.adventure.text.event.ClickEvent.custom(PAGES,
@@ -139,6 +336,110 @@ public final class CharacterBookController implements Consumer<ControlInput>, Au
         catch (RuntimeException ignored) { /* A diagnostic failure must not replay a book request. */ }
     }
 
+    @org.bukkit.event.EventHandler
+    public void statAction(io.papermc.paper.event.player.PlayerCustomClickEvent event) {
+        if (closed || !STATS.equals(event.getIdentifier())
+                || !(event.getCommonConnection() instanceof io.papermc.paper.connection.PlayerGameConnection connection)) return;
+        var player = connection.getPlayer();
+        var view = statViews.get(player.getUniqueId());
+        if (view == null || view.input().player() != player || event.getTag() == null) return;
+        String raw = event.getTag().string();
+        if (raw.length() > 80) return;
+        var match = STAT_PAYLOAD.matcher(raw);
+        if (!match.matches() || !view.nonce().equals(match.group(1))
+                || !statViews.remove(player.getUniqueId(), view) || !view.input().stillCurrent()) return;
+        var stat = Stat.valueOf(match.group(2));
+        var currentHealth = java.math.BigDecimal.valueOf(player.getHealth());
+        var nativeLimit = NativeHealthLimit.read();
+        characters.purchaseStat(view.input().session().character(), view.revision(), stat, currentHealth, nativeLimit)
+            .whenComplete((purchase, failure) -> {
+                try {
+                    nextTick.accept(() -> finishPurchase(view, stat, purchase, failure));
+                } catch (RuntimeException rejected) { report(view.input(), rejected); }
+            });
+    }
+
+    private void finishPurchase(StatView view, Stat stat, CharacterStorage.StatPurchase purchase, Throwable failure) {
+        var input = view.input();
+        if (closed || !input.stillCurrent()) return;
+        if (failure != null) {
+            report(input, failure);
+            input.player().sendMessage("Stat purchase could not be saved; no character state was changed.");
+            return;
+        }
+        if (purchase.status() == CharacterStorage.StatPurchaseStatus.APPLIED) {
+            var saved = purchase.record().orElseThrow();
+            try {
+                if (!sessions.acknowledgeProgress(input.session(), view.revision(), saved)) {
+                    input.player().sendMessage("Stat purchase was saved; reopen the character after the session transition.");
+                    return;
+                }
+            } catch (RuntimeException nativeFailure) {
+                report(input, nativeFailure);
+                input.player().sendMessage("Stat purchase was saved, but native health refresh failed; exit for recovery.");
+                return;
+            }
+            input.player().sendMessage(stat + " increased to " + saved.stats().get(stat) + ".");
+            load(input, 0);
+            return;
+        }
+        String message = switch (purchase.status()) {
+            case STALE -> "That character page is stale; reopen it before spending points.";
+            case NO_POINTS -> "This character has no unspent points.";
+            case UNAVAILABLE -> "This character is no longer available.";
+            case APPLIED -> throw new IllegalStateException("Handled applied purchase");
+        };
+        input.player().sendMessage(message);
+        load(input, 0);
+    }
+
+    @org.bukkit.event.EventHandler
+    public void abilityAction(io.papermc.paper.event.player.PlayerCustomClickEvent event) {
+        boolean unlock = ABILITY_UNLOCK.equals(event.getIdentifier());
+        boolean unlearn = ABILITY_UNLEARN.equals(event.getIdentifier());
+        if (closed || abilityEngine == null || !unlock && !unlearn
+                || !(event.getCommonConnection() instanceof io.papermc.paper.connection.PlayerGameConnection connection)
+                || event.getTag() == null) return;
+        var player = connection.getPlayer();
+        var view = abilityViews.get(player.getUniqueId());
+        if (view == null || view.input().player() != player) return;
+        String raw = event.getTag().string();
+        if (raw.length() > 120) return;
+        var match = ABILITY_PAYLOAD.matcher(raw);
+        if (!match.matches() || !view.nonce().equals(match.group(1)) || !view.ids().contains(match.group(2))
+                || !abilityViews.remove(player.getUniqueId(), view) || !view.input().stillCurrent()) return;
+        String ability = match.group(2);
+        var operation = unlock ? abilityEngine.purchase(view.input(), ability, view.revision())
+            : abilityEngine.unlearn(view.input(), ability, view.revision());
+        operation.whenComplete((mutation, failure) -> {
+            if (closed || !view.input().stillCurrent()) return;
+            if (failure != null) {
+                report(view.input(), failure);
+                player.sendMessage("Ability change could not be confirmed; reopen the character after session recovery.");
+                return;
+            }
+            player.sendMessage(abilityMessage(unlock, ability, mutation.status()));
+            load(view.input(), 0);
+        });
+    }
+
+    private static String abilityMessage(boolean unlock, String ability,
+                                         CharacterStorage.AbilityMutationStatus status) {
+        return switch (status) {
+            case APPLIED -> unlock ? "Learned " + ability + " and assigned it to the first available slot."
+                : "Unlearned " + ability + " and refunded 1 point.";
+            case UNCHANGED -> ability + " is unchanged.";
+            case REQUIREMENTS -> "The purchased base-stat requirements are not met.";
+            case NO_POINTS -> "This character does not have enough unspent points.";
+            case LOADOUT_FULL -> "All seven ability slots are occupied; unlearn an ability before learning another.";
+            case ALREADY_LEARNED -> "This character already knows " + ability + ".";
+            case NOT_LEARNED -> "This character no longer knows " + ability + ".";
+            case STALE -> "That character page is stale; reopen it before changing abilities.";
+            case COOLDOWN -> "That ability is still on cooldown.";
+            case UNAVAILABLE -> "That character or ability is unavailable.";
+        };
+    }
+
     @org.bukkit.event.EventHandler
     public void partyAction(io.papermc.paper.event.player.PlayerCustomClickEvent event) { partyControls.click(event); }
 
@@ -147,8 +448,12 @@ public final class CharacterBookController implements Consumer<ControlInput>, Au
         var owner = event.getPlayer().getUniqueId();
         pending.remove(owner);
         views.remove(owner);
+        statViews.remove(owner);
+        abilityViews.remove(owner);
         partyControls.forget(owner);
     }
 
-    @Override public void close() { closed = true; pending.clear(); views.clear(); partyControls.close(); }
+    @Override public void close() {
+        closed = true; pending.clear(); views.clear(); statViews.clear(); abilityViews.clear(); partyControls.close();
+    }
 }

src/main/java/games/dmg/fantasystick/book/PartyBookControls.java

@@ -69,12 +69,12 @@ public final class PartyBookControls implements AutoCloseable {
             } else {
                 var group = party.orElseThrow();
                 boolean leader = group.leader().equals(owner);
-                summary = summary.append(Component.text(group.members().size() + "/6 members\n\n"))
+                summary = summary.append(Component.text(group.members().size() + "/" + parties.maximumSize() + " members\n\n"))
                     .append(build.button("Leave party", () -> mutate(input, () -> parties.leave(owner, group.id()))));
                 if (leader) {
                     summary = summary.append(Component.newline())
                         .append(build.button("Disband party", () -> mutate(input, () -> parties.disband(owner, group.id()))));
-                    if (group.members().size() < 6) summary = summary.append(Component.newline())
+                    if (group.members().size() < parties.maximumSize()) summary = summary.append(Component.newline())
                         .append(build.button("Invite players", () -> show(input, Menu.PLAYERS, 0)));
                 }
                 build.pages.add(summary);

src/main/java/games/dmg/fantasystick/combat/BasicAttack.java

@@ -0,0 +1,91 @@
+package games.dmg.fantasystick.combat;
+
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import java.math.BigInteger;
+import java.time.Clock;
+import java.time.Duration;
+import java.time.Instant;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.function.Consumer;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDamageByEntityEvent;
+
+/** Server-thread built-in attack consumer; the bound stick's vanilla attack is always contained upstream. */
+public final class BasicAttack implements Consumer<ControlInput>, Listener, AutoCloseable {
+    private static final Duration CADENCE = Duration.ofSeconds(1);
+    private final EquipmentSessions sessions;
+    private final Clock clock;
+    private final Map<UUID, Instant> readyAt = new HashMap<>();
+    private Pending pending;
+    private boolean closed;
+
+    private static final class Pending {
+        final ControlInput input;
+        final LivingEntity target;
+        final Instant attackedAt;
+        boolean accepted;
+        Pending(ControlInput input, LivingEntity target, Instant attackedAt) {
+            this.input = input; this.target = target; this.attackedAt = attackedAt;
+        }
+    }
+
+    public BasicAttack(EquipmentSessions sessions) {
+        this(sessions, Clock.systemUTC());
+    }
+
+    public BasicAttack(EquipmentSessions sessions, Clock clock) {
+        this.sessions = Objects.requireNonNull(sessions);
+        this.clock = Objects.requireNonNull(clock);
+    }
+
+    @Override public void accept(ControlInput input) {
+        if (closed || pending != null || input.kind() != ControlInput.Kind.BASIC_ATTACK
+                || input.gesture() != ControlInput.Gesture.ATTACK
+                || !(input.target() instanceof LivingEntity target) || !input.stillCurrent()) return;
+        var record = sessions.currentRecord(input.session()).orElse(null);
+        if (record == null) return;
+        Instant now = clock.instant();
+        Instant ready = readyAt.get(input.session().character());
+        if (ready != null && now.isBefore(ready)) return;
+        BigInteger damage = damage(record.stats().get(Stat.STR));
+        double nativeDamage = damage.bitLength() > 1023 ? Double.MAX_VALUE : damage.doubleValue();
+        var attempt = new Pending(input, target, now);
+        pending = attempt;
+        try {
+            target.damage(nativeDamage, input.player());
+        } finally {
+            if (pending == attempt) pending = null;
+            if (attempt.accepted) readyAt.put(input.session().character(), attempt.attackedAt.plus(CADENCE));
+        }
+    }
+
+    static BigInteger damage(BigInteger strength) {
+        Objects.requireNonNull(strength);
+        if (strength.signum() < 0) throw new IllegalArgumentException("Strength must not be negative");
+        return strength.subtract(BigInteger.TEN).divide(BigInteger.TWO).max(BigInteger.ONE);
+    }
+
+    /** MONITOR observes the synchronous native result; cancelled/zero damage never spends cadence. */
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void acceptedDamage(EntityDamageByEntityEvent event) {
+        var attempt = pending;
+        if (closed || attempt == null || event.isCancelled() || event.getFinalDamage() <= 0
+                || event.getDamager() != attempt.input.player() || event.getEntity() != attempt.target
+                || !attempt.input.stillCurrent() || !sessions.current(attempt.input.session())) return;
+        attempt.accepted = true;
+    }
+
+    @Override public void close() {
+        closed = true;
+        pending = null;
+        readyAt.clear();
+    }
+}

src/main/java/games/dmg/fantasystick/crafting/RecipeDiscovery.java

@@ -0,0 +1,49 @@
+package games.dmg.fantasystick.crafting;
+
+import java.util.List;
+import java.util.Objects;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import org.bukkit.NamespacedKey;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerJoinEvent;
+
+/** Idempotent recipe-book visibility; recipe registration and crafting remain separate authorities. */
+public final class RecipeDiscovery implements Listener {
+    private final NamespacedKey recipe;
+    private final Logger logger;
+
+    public RecipeDiscovery(NamespacedKey recipe, Logger logger) {
+        this.recipe = Objects.requireNonNull(recipe, "recipe");
+        this.logger = Objects.requireNonNull(logger, "logger");
+    }
+
+    public void discoverAll(Iterable<? extends Player> players) {
+        for (var player : players) discover(player);
+    }
+
+    @EventHandler
+    public void onJoin(PlayerJoinEvent event) {
+        discover(event.getPlayer());
+    }
+
+    public void discover(Player player) {
+        Objects.requireNonNull(player, "player");
+        try {
+            if (player.hasDiscoveredRecipe(recipe)) return;
+            player.discoverRecipes(List.of(recipe));
+            if (!player.hasDiscoveredRecipe(recipe)) {
+                logger.warning("Could not discover character-sheet recipe for " + label(player));
+            }
+        } catch (RuntimeException failure) {
+            logger.log(Level.WARNING, "Could not discover character-sheet recipe for " + label(player), failure);
+        }
+    }
+
+    private static String label(Player player) {
+        try { return player.getName(); }
+        catch (RuntimeException ignored) { return "an unidentified player"; }
+    }
+}

src/main/java/games/dmg/fantasystick/items/CharacterSheets.java

@@ -14,6 +14,7 @@ import org.bukkit.persistence.PersistentDataType;
 /** Sheet presentation/identity only; saved records and session eligibility remain authoritative. */
 public final class CharacterSheets {
     public static final NamespacedKey RECIPE = new NamespacedKey("fantasystick", "character_sheet");
+    public static final NamespacedKey MODEL = new NamespacedKey("fantasystick", "character_sheet");
     private static final NamespacedKey VERSION = new NamespacedKey("fantasystick", "sheet_version");
     private static final NamespacedKey CHARACTER = new NamespacedKey("fantasystick", "character_id");
     private static final List<Component> INSTRUCTION = List.of(Component.text("Character sheet:"),
@@ -26,15 +27,18 @@ public final class CharacterSheets {
         var data = meta.getPersistentDataContainer();
         data.set(VERSION, PersistentDataType.INTEGER, 1);
         data.set(CHARACTER, PersistentDataType.STRING, character.id().toString());
+        meta.setItemModel(MODEL);
         item.setItemMeta(meta);
         return item;
     }
 
     /** Definition only: a future craft-completion adapter must persist and mint each actual result. */
     public ShapelessRecipe recipe() {
-        return new ShapelessRecipe(RECIPE, paper("Character sheet"))
+        var recipe = new ShapelessRecipe(RECIPE, paper("Character sheet"))
             .addIngredient(Material.STICK).addIngredient(Material.PAPER)
             .addIngredient(Material.FEATHER).addIngredient(Material.INK_SAC);
+        recipe.setCategory(org.bukkit.inventory.recipe.CraftingBookCategory.MISC);
+        return recipe;
     }
 
     private static ItemStack paper(String name) {
@@ -46,6 +50,16 @@ public final class CharacterSheets {
         return item;
     }
 
+    /** Adds only the cosmetic model association to an already authentic sheet. */
+    public boolean applyModel(ItemStack item) {
+        if (identify(item).isEmpty()) return false;
+        var meta = item.getItemMeta();
+        if (MODEL.equals(meta.getItemModel())) return true;
+        meta.setItemModel(MODEL);
+        item.setItemMeta(meta);
+        return true;
+    }
+
     /** A reference, not authorization to activate: the caller must load saved state and claim the session. */
     public Optional<UUID> identify(ItemStack item) {
         if (item == null || item.getType() != Material.PAPER || !item.hasItemMeta()) return Optional.empty();

src/main/java/games/dmg/fantasystick/items/SessionControls.java

@@ -1,6 +1,7 @@
 package games.dmg.fantasystick.items;
 
 import games.dmg.fantasystick.persistence.CharacterRecord;
+import java.time.Clock;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Optional;
@@ -17,6 +18,8 @@ import org.bukkit.persistence.PersistentDataType;
  * The caller must enforce session custody and suppress vanilla item uses; this class registers no events.
  */
 public final class SessionControls {
+    private final games.dmg.fantasystick.ability.AbilityRegistry registry;
+    private final Clock clock;
     private static final NamespacedKey VERSION = key("control_version");
     private static final NamespacedKey OWNER = key("control_owner_id");
     private static final NamespacedKey SESSION = key("control_session_id");
@@ -51,6 +54,20 @@ public final class SessionControls {
 
     public record Identity(UUID owner, UUID session, int slot) { }
 
+    public SessionControls() { this(new games.dmg.fantasystick.ability.AbilityRegistry(), Clock.systemUTC()); }
+    public SessionControls(games.dmg.fantasystick.ability.AbilityRegistry registry) {
+        this(registry, Clock.systemUTC());
+    }
+    public SessionControls(games.dmg.fantasystick.ability.AbilityRegistry registry, Clock clock) {
+        this.registry = Objects.requireNonNull(registry);
+        this.clock = Objects.requireNonNull(clock);
+    }
+
+    private Icon icon(String ability) {
+        var definition = registry.find(ability).orElse(null);
+        return definition == null ? ABILITIES.get(ability) : new Icon(definition.icon(), definition.name());
+    }
+
     /**
      * Builds the entire detached hotbar before a caller may start packing equipment.
      * Slot zero is a plain book control, not the pending character-book UI.
@@ -60,12 +77,17 @@ public final class SessionControls {
         Objects.requireNonNull(owner);
         Objects.requireNonNull(session);
         var items = new ItemStack[9];
+        var now = clock.instant();
         for (int slot = 0; slot < items.length; slot++) {
             String ability = slot < 2 ? "" : character.loadout().get(slot - 2);
+            Icon abilityIcon = ability.isEmpty() ? null : icon(ability);
+            var deadline = ability.isEmpty() ? null : character.cooldowns().get(ability);
+            boolean cooling = abilityIcon != null && deadline != null && now.isBefore(deadline);
             Icon icon = slot == 0 ? new Icon(Material.BOOK, "Character book")
                 : slot == 1 ? new Icon(Material.STICK, "Basic attack")
                 : ability.isEmpty() ? new Icon(Material.GRAY_DYE, "No Ability")
-                : ABILITIES.getOrDefault(ability, new Icon(Material.PAPER, "Unavailable ability: " + ability));
+                : abilityIcon == null ? new Icon(Material.PAPER, "Unavailable ability: " + ability)
+                : cooling ? new Icon(Material.GRAY_STAINED_GLASS_PANE, abilityIcon.name() + " — Cooling Down") : abilityIcon;
             var item = new ItemStack(icon.material());
             var meta = item.getItemMeta();
             meta.displayName(Component.text(icon.name()));
@@ -76,7 +98,7 @@ public final class SessionControls {
             data.set(SESSION, PersistentDataType.STRING, session.toString());
             data.set(SLOT, PersistentDataType.INTEGER, slot);
             data.set(KIND, PersistentDataType.STRING, slot == 0 ? "book" : slot == 1 ? "basic_attack"
-                : ability.isEmpty() ? "empty" : ABILITIES.containsKey(ability) ? "ability" : "unavailable");
+                : ability.isEmpty() ? "empty" : abilityIcon == null ? "unavailable" : cooling ? "cooldown" : "ability");
             if (!ability.isEmpty()) data.set(ABILITY, PersistentDataType.STRING, ability);
             item.setItemMeta(meta);
             items[slot] = item;
@@ -111,11 +133,12 @@ public final class SessionControls {
     public Optional<String> ability(ItemStack item) {
         if (identify(item).isEmpty()) return Optional.empty();
         var data = item.getPersistentDataContainer();
-        return "ability".equals(data.get(KIND, PersistentDataType.STRING))
+        String kind = data.get(KIND, PersistentDataType.STRING);
+        return kind.equals("ability") || kind.equals("cooldown")
             ? Optional.of(data.get(ABILITY, PersistentDataType.STRING)) : Optional.empty();
     }
 
-    private static boolean validKind(Material material, int slot, PersistentDataContainer data) {
+    private boolean validKind(Material material, int slot, PersistentDataContainer data) {
         String kind = data.get(KIND, PersistentDataType.STRING);
         if (slot == 0) return kind.equals("book") && material == Material.BOOK && !data.has(ABILITY);
         if (slot == 1) return kind.equals("basic_attack") && material == Material.STICK && !data.has(ABILITY);
@@ -123,8 +146,9 @@ public final class SessionControls {
         if (!data.has(ABILITY, PersistentDataType.STRING)) return false;
         String ability = data.get(ABILITY, PersistentDataType.STRING);
         if (ability.isBlank()) return false;
-        Icon icon = ABILITIES.get(ability);
+        Icon icon = icon(ability);
         return kind.equals("ability") ? icon != null && icon.material() == material
+            : kind.equals("cooldown") ? icon != null && material == Material.GRAY_STAINED_GLASS_PANE
             : kind.equals("unavailable") && icon == null && material == Material.PAPER;
     }
 

src/main/java/games/dmg/fantasystick/party/CombatExperience.java

@@ -0,0 +1,269 @@
+package games.dmg.fantasystick.party;
+
+import games.dmg.fantasystick.persistence.CharacterRecord;
+import games.dmg.fantasystick.persistence.CharacterStorage;
+import games.dmg.fantasystick.progression.CombatContributions;
+import games.dmg.fantasystick.progression.CombatRewardRules;
+import games.dmg.fantasystick.progression.ProgressionRules;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import games.dmg.fantasystick.session.SessionVisuals;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Clock;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.IdentityHashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Consumer;
+import java.util.function.Function;
+import org.bukkit.Color;
+import org.bukkit.Location;
+import org.bukkit.Sound;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.EntityType;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDamageByEntityEvent;
+import org.bukkit.event.entity.EntityDamageEvent;
+import org.bukkit.event.entity.EntityDeathEvent;
+import org.bukkit.event.entity.EntityRemoveEvent;
+import org.bukkit.event.entity.PlayerDeathEvent;
+
+/** Accepted native contribution capture and durable character-bound XP delivery. */
+public final class CombatExperience implements Listener, AutoCloseable {
+    public record Failure(UUID character, Throwable cause) { }
+    private record Defeat(EquipmentSessions.Active active, int level) { }
+    private static final Set<EntityType> PASSIVE = Set.of(
+        EntityType.ALLAY, EntityType.ARMADILLO, EntityType.AXOLOTL, EntityType.BAT, EntityType.CAMEL,
+        EntityType.CAT, EntityType.CHICKEN, EntityType.COD, EntityType.COPPER_GOLEM, EntityType.COW,
+        EntityType.DONKEY, EntityType.FOX, EntityType.FROG, EntityType.GLOW_SQUID, EntityType.HAPPY_GHAST,
+        EntityType.HORSE, EntityType.MOOSHROOM, EntityType.MULE, EntityType.NAUTILUS, EntityType.OCELOT,
+        EntityType.PARROT, EntityType.PIG, EntityType.RABBIT, EntityType.SALMON, EntityType.SHEEP,
+        EntityType.SKELETON_HORSE, EntityType.SNIFFER, EntityType.SNOW_GOLEM, EntityType.SQUID,
+        EntityType.STRIDER, EntityType.TADPOLE, EntityType.TROPICAL_FISH, EntityType.TURTLE,
+        EntityType.VILLAGER, EntityType.WANDERING_TRADER, EntityType.ZOMBIE_HORSE);
+
+    private final CharacterStorage characters;
+    private final ProgressionRules progression;
+    private final CombatRewardRules rewards;
+    private final EquipmentSessions sessions;
+    private final Clock clock;
+    private final Consumer<Runnable> nextTick;
+    private final Function<UUID, Player> players;
+    private final Consumer<Failure> failures;
+    private final CombatSources sources;
+    private final CombatContributions contributions;
+    private final Map<PlayerDeathEvent, Defeat> defeats = new IdentityHashMap<>();
+    private final Map<UUID, PendingAward> pending = new ConcurrentHashMap<>();
+    private final java.util.concurrent.ConcurrentLinkedQueue<UUID> retries = new java.util.concurrent.ConcurrentLinkedQueue<>();
+    private org.bukkit.scheduler.BukkitTask retryTask;
+    private boolean closed;
+
+    private final class PendingAward {
+        final UUID id = UUID.randomUUID();
+        final UUID character;
+        final BigInteger reward;
+        final CombatRewardRules.KillPosition restricted;
+        BigInteger expectedRevision;
+        boolean running;
+        PendingAward(UUID character, BigInteger reward, CombatRewardRules.KillPosition restricted) {
+            this.character = character; this.reward = reward; this.restricted = restricted;
+        }
+    }
+
+    public CombatExperience(CharacterStorage characters, ProgressionRules progression, CombatRewardRules rewards,
+                            EquipmentSessions sessions, Clock clock, Consumer<Runnable> nextTick,
+                            Function<UUID, Player> players, Consumer<Failure> failures) {
+        this.characters = Objects.requireNonNull(characters); this.progression = Objects.requireNonNull(progression);
+        this.rewards = Objects.requireNonNull(rewards); this.sessions = Objects.requireNonNull(sessions);
+        this.clock = Objects.requireNonNull(clock); this.nextTick = Objects.requireNonNull(nextTick);
+        this.players = Objects.requireNonNull(players); this.failures = Objects.requireNonNull(failures);
+        sources = new CombatSources(sessions); contributions = new CombatContributions(rewards);
+    }
+
+    public void install(org.bukkit.plugin.Plugin plugin) {
+        if (closed || retryTask != null) throw new IllegalStateException("Combat experience is already installed or closed");
+        retryTask = plugin.getServer().getScheduler().runTaskTimer(plugin, this::retryPending, 20, 20);
+    }
+
+    /** Records target-specific, effective support; only a direct contributor can activate it at defeat. */
+    public void support(UUID target, UUID supportingCharacter, EquipmentSessions.Active aided, BigDecimal amount) {
+        Objects.requireNonNull(target); Objects.requireNonNull(supportingCharacter); Objects.requireNonNull(aided); Objects.requireNonNull(amount);
+        if (closed || amount.signum() <= 0 || !sessions.current(aided) || supportingCharacter.equals(aided.character())) return;
+        contributions.support(target, aided.character(), supportingCharacter, clock.instant());
+    }
+
+    /** Records effective healing; any directly contributed target can qualify it within ten seconds. */
+    public void support(UUID supportingCharacter, EquipmentSessions.Active aided, BigDecimal amount) {
+        Objects.requireNonNull(supportingCharacter); Objects.requireNonNull(aided); Objects.requireNonNull(amount);
+        if (closed || amount.signum() <= 0 || !sessions.current(aided) || supportingCharacter.equals(aided.character())) return;
+        contributions.support(aided.character(), supportingCharacter, clock.instant());
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void damage(EntityDamageEvent event) {
+        if (closed || games.dmg.fantasystick.ability.GuardianBond.redirectedDamage()
+                || event.getFinalDamage() <= 0) return;
+        var origin = source(event);
+        if (origin == null || origin.session() == null || !sources.current(origin)
+                || event.getEntity().getUniqueId().equals(origin.player())) return;
+        contributions.accept(event.getEntity().getUniqueId(), origin.character(), clock.instant());
+    }
+
+    private CombatSources.Origin source(EntityDamageEvent event) {
+        if (event.getEntity() instanceof Player target) {
+            var ongoing = OngoingDamage.read(target, event.getCause());
+            if (ongoing != null) return ongoing.source();
+        }
+        var origin = sources.read(event.getDamageSource().getDirectEntity());
+        if (origin == null && event instanceof EntityDamageByEntityEvent byEntity) origin = sources.read(byEntity.getDamager());
+        if (origin == null) origin = sources.read(event.getDamageSource().getCausingEntity());
+        return origin;
+    }
+
+    @EventHandler(priority = EventPriority.LOWEST, ignoreCancelled = true)
+    public void beforePlayerDeath(PlayerDeathEvent event) {
+        if (closed) return;
+        var active = sessions.active(event.getEntity().getUniqueId()).orElse(null);
+        var record = active == null ? null : sessions.currentRecord(active).orElse(null);
+        if (record != null) defeats.put(event, new Defeat(active, record.level()));
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void playerDeath(PlayerDeathEvent event) {
+        var defeat = defeats.remove(event);
+        if (closed || defeat == null || !event.isCancelled() || sessions.current(defeat.active())) return;
+        award(event.getEntity(), CombatRewardRules.Target.FANTASY_CHARACTER, defeat.level(), defeat.active().character());
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void mobDeath(EntityDeathEvent event) {
+        if (closed || event instanceof PlayerDeathEvent) return;
+        award(event.getEntity(), classify(event.getEntity()), 0, null);
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR)
+    public void removed(EntityRemoveEvent event) {
+        if (!closed && event.getCause() != EntityRemoveEvent.Cause.DEATH) {
+            contributions.invalidate(event.getEntity().getUniqueId());
+        }
+    }
+
+    private void award(LivingEntity target, CombatRewardRules.Target kind, int level, UUID defeatedCharacter) {
+        Instant now = clock.instant();
+        var contributors = new ArrayList<>(contributions.consume(target.getUniqueId(), now));
+        if (defeatedCharacter != null) contributors.remove(defeatedCharacter);
+        if (contributors.isEmpty()) return;
+        BigInteger share = rewards.share(rewards.pool(kind, level), contributors.size());
+        CombatRewardRules.KillPosition restricted = kind == CombatRewardRules.Target.PASSIVE
+            || kind == CombatRewardRules.Target.FANTASY_CHARACTER ? null : position(target.getLocation());
+        for (UUID character : contributors) {
+            var operation = new PendingAward(character, share, restricted);
+            pending.put(operation.id, operation);
+            attempt(operation);
+        }
+    }
+
+    private static CombatRewardRules.KillPosition position(Location location) {
+        var world = Objects.requireNonNull(location.getWorld(), "Kill location has no world").getUID();
+        return new CombatRewardRules.KillPosition(Objects.requireNonNull(world, "Kill world has no UUID"),
+            BigDecimal.valueOf(location.getX()), BigDecimal.valueOf(location.getY()), BigDecimal.valueOf(location.getZ()));
+    }
+
+    private void attempt(PendingAward operation) {
+        synchronized (operation) {
+            if (closed || operation.running || !pending.containsKey(operation.id)) return;
+            operation.running = true;
+        }
+        if (operation.expectedRevision == null) {
+            characters.find(operation.character).whenComplete((record, failure) -> {
+                synchronized (operation) { operation.running = false; }
+                if (failure != null) { fail(operation, failure); return; }
+                if (record.isEmpty() || record.orElseThrow().dead()) { pending.remove(operation.id); return; }
+                operation.expectedRevision = record.orElseThrow().revision();
+                attempt(operation);
+            });
+            return;
+        }
+        characters.awardCombatExperience(operation.character, operation.expectedRevision, operation.reward,
+            progression, rewards, operation.restricted).whenComplete((award, failure) -> {
+                synchronized (operation) { operation.running = false; }
+                if (failure != null) { fail(operation, failure); return; }
+                if (award.status() == CharacterStorage.CombatAwardStatus.STALE && award.record().isPresent()) {
+                    operation.expectedRevision = award.record().orElseThrow().revision(); attempt(operation); return;
+                }
+                pending.remove(operation.id);
+                if (award.record().isEmpty() || award.status() == CharacterStorage.CombatAwardStatus.UNAVAILABLE) return;
+                try { nextTick.accept(() -> acknowledge(operation, award)); }
+                catch (RuntimeException rejected) { report(operation.character, rejected); }
+            });
+    }
+
+    private void fail(PendingAward operation, Throwable failure) {
+        report(operation.character, failure);
+        if (!closed && pending.containsKey(operation.id)) retries.offer(operation.id);
+    }
+
+    public void retryPending() {
+        if (closed) return;
+        contributions.sweep(clock.instant());
+        for (int attempted = 0; attempted < 64; attempted++) {
+            UUID id = retries.poll();
+            if (id == null) break;
+            var operation = pending.get(id);
+            if (operation != null) attempt(operation);
+        }
+    }
+
+    private void acknowledge(PendingAward operation, CharacterStorage.CombatAward award) {
+        if (closed) return;
+        CharacterRecord saved = award.record().orElseThrow();
+        var active = sessions.activeCharacter(operation.character).orElse(null);
+        if (active != null && !sessions.acknowledgeProgress(active, saved.revision().subtract(BigInteger.ONE), saved)
+                && !sessions.currentRecord(active).filter(saved::equals).isPresent()) {
+            report(operation.character, new IllegalStateException("Saved combat progress could not synchronize with active session"));
+            return;
+        }
+        Player player = active == null ? null : players.apply(active.player());
+        if (player == null || !player.isOnline()) return;
+        if (award.status() == CharacterStorage.CombatAwardStatus.APPLIED) {
+            player.sendMessage("Earned " + operation.reward + " fantasy XP.");
+            for (int gained = 1; gained <= award.levels(); gained++) {
+                int level = saved.level() - award.levels() + gained;
+                player.sendMessage("Level " + level + "! Gained 1 character point.");
+                SessionVisuals.burst(player, Color.BLUE, 12);
+                player.playSound(player.getLocation(), Sound.ENTITY_PLAYER_LEVELUP, 1, 1);
+            }
+        } else if (award.status() == CharacterStorage.CombatAwardStatus.SPACING_BLOCKED) {
+            player.sendMessage("No fantasy XP: this restricted kill was too close to your previous one in this world.");
+        } else if (award.status() == CharacterStorage.CombatAwardStatus.AT_CAP) {
+            player.sendMessage("No fantasy XP: this character is already at the configured maximum level.");
+        } else if (award.status() == CharacterStorage.CombatAwardStatus.UNCHANGED) {
+            player.sendMessage("No fantasy XP: this target's configured reward is zero.");
+        }
+    }
+
+    static CombatRewardRules.Target classify(LivingEntity entity) {
+        EntityType type = entity.getType();
+        if (type == EntityType.WARDEN || type == EntityType.ENDER_DRAGON) return CombatRewardRules.Target.BOSS;
+        return PASSIVE.contains(type) ? CombatRewardRules.Target.PASSIVE : CombatRewardRules.Target.ORDINARY;
+    }
+
+    private void report(UUID character, Throwable failure) {
+        try { failures.accept(new Failure(character, failure)); }
+        catch (RuntimeException ignored) { /* Diagnostics never replay or acknowledge a reward. */ }
+    }
+
+    @Override public void close() {
+        closed = true;
+        if (retryTask != null) retryTask.cancel();
+        defeats.clear(); pending.clear(); retries.clear(); contributions.close();
+    }
+}

src/main/java/games/dmg/fantasystick/party/PartyCombat.java

@@ -66,6 +66,7 @@ public final class PartyCombat implements Listener, AutoCloseable {
 
     @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
     public void damage(EntityDamageEvent event) {
+        if (games.dmg.fantasystick.ability.GuardianBond.redirectedDamage()) return;
         if (event.getEntity() instanceof Player target) {
             var ongoing = OngoingDamage.read(target, event.getCause());
             if (ongoing != null && (!sources.current(ongoing.target()) || blocked(ongoing.source(), target))) {

src/main/java/games/dmg/fantasystick/party/PartyRoster.java

@@ -25,10 +25,19 @@ public final class PartyRoster implements AutoCloseable {
     private boolean closed;
     private final Clock clock;
     private final Predicate<UUID> online;
+    private final java.util.function.IntSupplier maximumSize;
 
-    public PartyRoster(Clock clock, Predicate<UUID> online) {
+    public PartyRoster(Clock clock, Predicate<UUID> online) { this(clock, online, () -> 6); }
+    public PartyRoster(Clock clock, Predicate<UUID> online, java.util.function.IntSupplier maximumSize) {
         this.clock = Objects.requireNonNull(clock);
         this.online = Objects.requireNonNull(online);
+        this.maximumSize = Objects.requireNonNull(maximumSize);
+        maximumSize();
+    }
+    public int maximumSize() {
+        int value = maximumSize.getAsInt();
+        if (value < 1) throw new IllegalStateException("Party maximum must be positive");
+        return value;
     }
     public Optional<Party> create(UUID player) {
         if (closed || !connected(player) || membership.containsKey(player)) return Optional.empty();
@@ -45,7 +54,7 @@ public final class PartyRoster implements AutoCloseable {
     public Optional<Invitation> invite(UUID leader, UUID party, UUID invitee) {
         expire();
         var group = managedBy(leader, party);
-        if (group == null || group.members().size() >= 6 || !connected(invitee) || membership.containsKey(invitee)) return Optional.empty();
+        if (group == null || group.members().size() >= maximumSize() || !connected(invitee) || membership.containsKey(invitee)) return Optional.empty();
         var existing = invitations.values().stream().filter(i -> i.party().equals(party) && i.invitee().equals(invitee)).findFirst();
         if (existing.isPresent()) return existing;
         var invitation = new Invitation(UUID.randomUUID(), party, leader, invitee, clock.instant().plusSeconds(60));
@@ -57,7 +66,7 @@ public final class PartyRoster implements AutoCloseable {
         var offer = invitations.get(invitation);
         if (offer == null || !offer.invitee().equals(player) || !connected(player) || membership.containsKey(player)) return false;
         var group = membership.get(offer.leader());
-        if (group == null || group.members().size() >= 6 || !group.id().equals(offer.party())) return false;
+        if (group == null || group.members().size() >= maximumSize() || !group.id().equals(offer.party())) return false;
         var members = new ArrayList<>(group.members());
         members.add(player);
         var updated = new Party(group.id(), group.leader(), members);

src/main/java/games/dmg/fantasystick/persistence/AdminReviveSettings.java

@@ -0,0 +1,42 @@
+package games.dmg.fantasystick.persistence;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Durable save-before-publish policy for later administrator revival selections. */
+public final class AdminReviveSettings implements AutoCloseable {
+    public static final String KEY="admin-revive-selection-timeout-seconds";public static final String DEFAULT="60";
+    private static final int MAX_BYTES=1_048_576;private static final long MAX_SECONDS=365L*24*60*60;
+    @FunctionalInterface interface Replacement{void move(Path from,Path to)throws IOException;}
+    public record Update(String value,Duration timeout,long sequence){}
+    private final Path directory;private final Replacement replacement;private final java.util.concurrent.ExecutorService worker=Executors.newSingleThreadExecutor(task->new Thread(task,"fantasy-admin-revive-configuration"));
+    private volatile Duration effective;private Duration persisted;private long persistedSequence,publishedSequence;private boolean closed;private int pending;private final CompletableFuture<Void> drained=new CompletableFuture<>();
+    public AdminReviveSettings(Path directory,Duration initial){this(directory,initial,(from,to)->Files.move(from,to,StandardCopyOption.ATOMIC_MOVE,StandardCopyOption.REPLACE_EXISTING));}
+    AdminReviveSettings(Path directory,Duration initial,Replacement replacement){this.directory=Objects.requireNonNull(directory).toAbsolutePath();this.replacement=Objects.requireNonNull(replacement);effective=validate(initial);persisted=effective;}
+    public static Duration parse(Object value){if(value==null)return Duration.ofSeconds(60);try{return validate(Duration.ofSeconds(value instanceof Number n?new java.math.BigDecimal(n.toString()).longValueExact():Long.parseLong(value.toString())));}catch(ArithmeticException|NumberFormatException invalid){throw new IllegalArgumentException(KEY+" must be positive whole seconds",invalid);}}
+    private static Duration validate(Duration value){long seconds;try{seconds=value.toSeconds();}catch(ArithmeticException invalid){throw new IllegalArgumentException("Invalid admin revival timeout",invalid);}if(value.isZero()||value.isNegative()||value.getNano()!=0||seconds>MAX_SECONDS)throw new IllegalArgumentException(KEY+" must be positive whole seconds through 365 days");return value;}
+    public Duration timeout(){return effective;}public String value(){return Long.toString(effective.toSeconds());}
+    public CompletionStage<Update> set(String raw){Duration accepted=parse(raw);synchronized(this){if(closed)return CompletableFuture.failedStage(new IOException("Configuration store is closed"));pending++;}try{return CompletableFuture.supplyAsync(()->{try{save(accepted);persisted=accepted;return new Update(Long.toString(accepted.toSeconds()),accepted,++persistedSequence);}catch(IOException|RuntimeException failure){throw new java.util.concurrent.CompletionException(new IOException("Admin revival configuration save refused or failed; effective setting unchanged"));}finally{finished();}},worker).minimalCompletionStage();}catch(RejectedExecutionException rejected){finished();return CompletableFuture.failedStage(new IOException("Configuration store is closed"));}}
+    public synchronized void publish(Update update){if(update.sequence()<=publishedSequence)return;effective=validate(update.timeout());publishedSequence=update.sequence();}
+    private void save(Duration value)throws IOException{Files.createDirectories(directory);if(!Files.isDirectory(directory,LinkOption.NOFOLLOW_LINKS))throw new IOException("Unsafe directory");var file=directory.resolve("config.yml");var lockFile=directory.resolve(".config.lock");if(Files.exists(lockFile,LinkOption.NOFOLLOW_LINKS)&&!Files.isRegularFile(lockFile,LinkOption.NOFOLLOW_LINKS))throw new IOException("Unsafe lock");try(var channel=FileChannel.open(lockFile,StandardOpenOption.CREATE,StandardOpenOption.WRITE,LinkOption.NOFOLLOW_LINKS);var lock=channel.tryLock()){if(lock==null)throw new IOException("Configuration busy");var options=new LoaderOptions();options.setAllowDuplicateKeys(false);options.setMaxAliasesForCollections(20);options.setCodePointLimit(MAX_BYTES);var yaml=new Yaml(new SafeConstructor(options));Map<String,Object> values=new LinkedHashMap<>();if(Files.exists(file,LinkOption.NOFOLLOW_LINKS)){if(!Files.isRegularFile(file,LinkOption.NOFOLLOW_LINKS))throw new IOException("Unsafe configuration");byte[] bytes;try(var input=Files.newInputStream(file,LinkOption.NOFOLLOW_LINKS)){bytes=input.readNBytes(MAX_BYTES+1);}if(bytes.length>MAX_BYTES)throw new IOException("Configuration too large");Object loaded=yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());if(loaded!=null){if(!(loaded instanceof Map<?,?> map))throw new IOException("Invalid configuration root");for(var entry:map.entrySet()){if(!(entry.getKey() instanceof String key))throw new IOException("Invalid configuration key");values.put(key,entry.getValue());}}}values.put(KEY,Long.toString(value.toSeconds()));byte[] bytes=yaml.dump(values).getBytes(StandardCharsets.UTF_8);if(bytes.length>MAX_BYTES)throw new IOException("Configuration too large");Path temporary=Files.createTempFile(directory,".config-",".tmp");try{try(var output=FileChannel.open(temporary,StandardOpenOption.WRITE,LinkOption.NOFOLLOW_LINKS)){var buffer=ByteBuffer.wrap(bytes);while(buffer.hasRemaining())output.write(buffer);output.force(true);}replacement.move(temporary,file);}finally{Files.deleteIfExists(temporary);}}catch(OverlappingFileLockException busy){throw new IOException("Configuration busy");}}
+    private synchronized void finished(){pending--;if(closed&&pending==0)drained.complete(null);}public CompletionStage<Void> drained(){return drained.minimalCompletionStage();}@Override public synchronized void close(){closed=true;worker.shutdown();if(pending==0)drained.complete(null);}
+}

src/main/java/games/dmg/fantasystick/persistence/ChainLightningSettings.java

@@ -0,0 +1,173 @@
+package games.dmg.fantasystick.persistence;
+
+import games.dmg.fantasystick.ability.ChainLightning;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Serialized durable Chain Lightning settings; publication remains a server-thread caller decision. */
+public final class ChainLightningSettings implements AutoCloseable {
+    private static final int MAX_BYTES = 1_048_576;
+    public static final String BASE = "chain-lightning-base-damage";
+    public static final String COOLDOWN = "chain-lightning-cooldown-seconds";
+    public static final String INITIAL_RANGE = "chain-lightning-initial-range-blocks";
+    public static final String JUMP_RANGE = "chain-lightning-jump-range-blocks";
+    public static final String ADDITIONAL = "chain-lightning-additional-targets";
+    public static final String MULTIPLIER = "chain-lightning-jump-multiplier";
+    private static final List<String> KEYS = List.of(BASE, COOLDOWN, INITIAL_RANGE, JUMP_RANGE, ADDITIONAL, MULTIPLIER);
+    private static final Map<String, String> DEFAULTS = Map.of(
+        BASE, "8", COOLDOWN, "18", INITIAL_RANGE, "16", JUMP_RANGE, "6", ADDITIONAL, "3", MULTIPLIER, "0.75");
+
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(String key, String value, ChainLightning.Settings settings, Map<String, String> values, long sequence) {
+        public Update { values = Map.copyOf(values); }
+    }
+
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-chain-lightning-configuration"));
+    private volatile Map<String, String> effectiveValues;
+    private Map<String, String> persistedValues;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public ChainLightningSettings(Path directory, Map<String, String> initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    ChainLightningSettings(Path directory, Map<String, String> initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath(); this.replacement = Objects.requireNonNull(replacement);
+        var copy = new LinkedHashMap<String, String>();
+        for (String key : KEYS) copy.put(key, Objects.requireNonNull(initial.get(key)));
+        parse(copy); effectiveValues = Map.copyOf(copy); persistedValues = Map.copyOf(copy);
+    }
+
+    public static List<String> keys() { return KEYS; }
+    public static String defaultValue(String key) { return DEFAULTS.get(key); }
+    public String value(String key) { return effectiveValues.get(key); }
+    public ChainLightning.Settings settings() { return parse(effectiveValues); }
+
+    public synchronized void publish(Update update) {
+        Objects.requireNonNull(update);
+        if (update.sequence() <= publishedSequence) return;
+        parse(update.values()); effectiveValues = update.values(); publishedSequence = update.sequence();
+    }
+
+    public CompletionStage<Update> set(String key, String value) {
+        Objects.requireNonNull(key); Objects.requireNonNull(value);
+        if (!KEYS.contains(key)) return CompletableFuture.failedStage(new IllegalArgumentException("Unknown setting"));
+        String accepted = canonical(value); var preview = new LinkedHashMap<>(effectiveValues);
+        preview.put(key, accepted); parse(preview);
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    var next = new LinkedHashMap<>(persistedValues); next.put(key, accepted);
+                    var parsed = parse(next); save(key, accepted); persistedValues = Map.copyOf(next);
+                    return new Update(key, accepted, parsed, persistedValues, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(failure instanceof IllegalArgumentException
+                        ? failure : new IOException("Chain Lightning configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished(); return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    private static String canonical(String raw) {
+        try { return new BigDecimal(raw).stripTrailingZeros().toPlainString(); }
+        catch (NumberFormatException invalid) { throw new IllegalArgumentException("Invalid value", invalid); }
+    }
+
+    public static ChainLightning.Settings parse(Map<String, String> values) {
+        try { return new ChainLightning.Settings(new BigDecimal(values.get(BASE)).toBigIntegerExact(),
+            seconds(values.get(COOLDOWN)), finite(values.get(INITIAL_RANGE)), finite(values.get(JUMP_RANGE)),
+            new BigDecimal(values.get(ADDITIONAL)).intValueExact(), new BigDecimal(values.get(MULTIPLIER))); }
+        catch (ArithmeticException | NumberFormatException | NullPointerException invalid) {
+            throw new IllegalArgumentException("Chain Lightning settings must use supported numeric values", invalid);
+        }
+    }
+
+    private static Duration seconds(String value) {
+        var nanos = new BigDecimal(value).movePointRight(9).toBigIntegerExact().longValueExact();
+        return Duration.ofNanos(nanos);
+    }
+
+    private static double finite(String value) {
+        double result = new BigDecimal(value).doubleValue();
+        if (!Double.isFinite(result)) throw new IllegalArgumentException("Setting is not finite");
+        return result;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml"); var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS) && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) {
+            throw new IOException("Unsafe lock");
+        }
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                LinkOption.NOFOLLOW_LINKS); var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options)); Map<String, Object> document = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String savedKey)) throw new IOException("Invalid configuration key");
+                        document.put(savedKey, entry.getValue());
+                    }
+                }
+            }
+            document.put(key, value); byte[] bytes = yaml.dump(document).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() { pending--; if (closed && pending == 0) drained.complete(null); }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() { closed = true; worker.shutdown(); if (pending == 0) drained.complete(null); }
+}

src/main/java/games/dmg/fantasystick/persistence/CharacterRecord.java

@@ -1,5 +1,6 @@
 package games.dmg.fantasystick.persistence;
 
+import games.dmg.fantasystick.progression.CombatRewardRules;
 import games.dmg.fantasystick.progression.Stat;
 import java.math.BigDecimal;
 import java.math.BigInteger;
@@ -16,7 +17,16 @@ public record CharacterRecord(
         UUID id, String name, BigInteger revision, Map<Stat, BigInteger> stats,
         int level, BigInteger experience, BigInteger unspentPoints, BigDecimal health,
         Set<String> learned, List<String> loadout, Map<String, Instant> cooldowns,
+        Map<UUID, CombatRewardRules.KillPosition> restrictedKills,
         boolean dead, UUID deathId, Instant diedAt) {
+    public CharacterRecord(UUID id, String name, BigInteger revision, Map<Stat, BigInteger> stats,
+                           int level, BigInteger experience, BigInteger unspentPoints, BigDecimal health,
+                           Set<String> learned, List<String> loadout, Map<String, Instant> cooldowns,
+                           boolean dead, UUID deathId, Instant diedAt) {
+        this(id, name, revision, stats, level, experience, unspentPoints, health, learned, loadout,
+            cooldowns, Map.of(), dead, deathId, diedAt);
+    }
+
     public CharacterRecord {
         Objects.requireNonNull(id);
         Objects.requireNonNull(name);
@@ -28,6 +38,7 @@ public record CharacterRecord(
         learned = Set.copyOf(learned);
         loadout = List.copyOf(loadout);
         cooldowns = Map.copyOf(cooldowns);
+        restrictedKills = Map.copyOf(restrictedKills);
         if (revision.signum() < 0 || experience.signum() < 0 || unspentPoints.signum() < 0 || level < 1
                 || !stats.keySet().equals(EnumSet.allOf(Stat.class))
                 || stats.values().stream().anyMatch(value -> value.signum() < 0)
@@ -35,6 +46,8 @@ public record CharacterRecord(
                 || health.compareTo(new BigDecimal(stats.get(Stat.CON).add(BigInteger.TEN))) > 0
                 || loadout.size() != 7 || learned.stream().anyMatch(String::isBlank)
                 || cooldowns.keySet().stream().anyMatch(String::isBlank)
+                || restrictedKills.size() > 1024
+                || restrictedKills.entrySet().stream().anyMatch(entry -> !entry.getKey().equals(entry.getValue().world()))
                 || (deathId == null) != (diedAt == null) || dead && deathId == null) {
             throw new IllegalArgumentException("Invalid character record");
         }

src/main/java/games/dmg/fantasystick/persistence/CharacterStorage.java

@@ -1,5 +1,7 @@
 package games.dmg.fantasystick.persistence;
 
+import games.dmg.fantasystick.progression.ProgressionRules;
+import games.dmg.fantasystick.progression.Stat;
 import java.io.IOException;
 import java.math.BigInteger;
 import java.time.Clock;
@@ -204,26 +206,262 @@ public final class CharacterStorage implements AutoCloseable {
             if (old.name().equals(name)) return Optional.of(old);
             var renamed = new CharacterRecord(old.id(), name, old.revision().add(BigInteger.ONE), old.stats(), old.level(),
                 old.experience(), old.unspentPoints(), old.health(), old.learned(), old.loadout(), old.cooldowns(),
-                false, old.deathId(), old.diedAt());
+                old.restrictedKills(), false, old.deathId(), old.diedAt());
             repository.replace(renamed, old.revision());
             return Optional.of(renamed);
         });
     }
 
+    public enum ExperienceAwardStatus { APPLIED, AT_CAP, UNCHANGED, STALE, UNAVAILABLE }
+    public record ExperienceAward(ExperienceAwardStatus status, Optional<CharacterRecord> record, int levels) { }
+
+    /** Persist configured transferable XP/level/point progression as one expected revision. */
+    public CompletableFuture<ExperienceAward> awardExperience(UUID characterId, BigInteger expectedRevision,
+                                                               BigInteger reward, ProgressionRules rules) {
+        Objects.requireNonNull(characterId);
+        Objects.requireNonNull(expectedRevision);
+        Objects.requireNonNull(reward);
+        Objects.requireNonNull(rules);
+        if (reward.signum() < 0) throw new IllegalArgumentException("Experience reward must not be negative");
+        return submit(() -> {
+            var found = repository.load(characterId);
+            if (found.isEmpty() || found.orElseThrow().dead()) {
+                return new ExperienceAward(ExperienceAwardStatus.UNAVAILABLE, Optional.empty(), 0);
+            }
+            var old = found.orElseThrow();
+            if (!old.revision().equals(expectedRevision)) {
+                return new ExperienceAward(ExperienceAwardStatus.STALE, Optional.of(old), 0);
+            }
+            var cap = rules.xpPerLevel().multiply(BigInteger.valueOf(rules.maximumLevel() - 1L));
+            if (old.level() >= rules.maximumLevel() || old.experience().compareTo(cap) >= 0) {
+                return new ExperienceAward(ExperienceAwardStatus.AT_CAP, Optional.of(old), 0);
+            }
+            var experience = old.experience().add(reward).min(cap);
+            if (experience.equals(old.experience())) {
+                var status = old.level() >= rules.maximumLevel()
+                    ? ExperienceAwardStatus.AT_CAP : ExperienceAwardStatus.UNCHANGED;
+                return new ExperienceAward(status, Optional.of(old), 0);
+            }
+            int level = experience.divide(rules.xpPerLevel()).intValueExact() + 1;
+            int gained = Math.max(0, level - old.level());
+            var saved = new CharacterRecord(old.id(), old.name(), old.revision().add(BigInteger.ONE), old.stats(),
+                level, experience, old.unspentPoints().add(BigInteger.valueOf(gained)), old.health(), old.learned(),
+                old.loadout(), old.cooldowns(), old.restrictedKills(), false, old.deathId(), old.diedAt());
+            repository.replace(saved, old.revision());
+            return new ExperienceAward(ExperienceAwardStatus.APPLIED, Optional.of(saved), gained);
+        });
+    }
+
+    public enum CombatAwardStatus { APPLIED, SPACING_BLOCKED, AT_CAP, UNCHANGED, STALE, UNAVAILABLE }
+    public record CombatAward(CombatAwardStatus status, Optional<CharacterRecord> record, int levels) { }
+
+    /** Persist one combat share and its restricted-kill reference in the same character revision. */
+    public CompletableFuture<CombatAward> awardCombatExperience(UUID characterId, BigInteger expectedRevision,
+            BigInteger reward, ProgressionRules progression,
+            games.dmg.fantasystick.progression.CombatRewardRules rewards,
+            games.dmg.fantasystick.progression.CombatRewardRules.KillPosition restrictedKill) {
+        Objects.requireNonNull(characterId); Objects.requireNonNull(expectedRevision);
+        Objects.requireNonNull(reward); Objects.requireNonNull(progression); Objects.requireNonNull(rewards);
+        if (reward.signum() < 0) throw new IllegalArgumentException("Experience reward must not be negative");
+        return submit(() -> {
+            var found = repository.load(characterId);
+            if (found.isEmpty() || found.orElseThrow().dead()) {
+                return new CombatAward(CombatAwardStatus.UNAVAILABLE, Optional.empty(), 0);
+            }
+            var old = found.orElseThrow();
+            if (!old.revision().equals(expectedRevision)) {
+                return new CombatAward(CombatAwardStatus.STALE, Optional.of(old), 0);
+            }
+            boolean eligible = restrictedKill == null || old.restrictedKills().get(restrictedKill.world()) == null
+                || rewards.spaced(old.restrictedKills().get(restrictedKill.world()), restrictedKill);
+            var history = new java.util.HashMap<>(old.restrictedKills());
+            if (restrictedKill != null) history.put(restrictedKill.world(), restrictedKill);
+            var cap = progression.xpPerLevel().multiply(BigInteger.valueOf(progression.maximumLevel() - 1L));
+            boolean atCap = old.level() >= progression.maximumLevel() || old.experience().compareTo(cap) >= 0;
+            var experience = eligible && !atCap ? old.experience().add(reward).min(cap) : old.experience();
+            int level = atCap ? old.level() : experience.divide(progression.xpPerLevel()).intValueExact() + 1;
+            int gained = Math.max(0, level - old.level());
+            var status = !eligible ? CombatAwardStatus.SPACING_BLOCKED : atCap ? CombatAwardStatus.AT_CAP
+                : experience.equals(old.experience()) ? CombatAwardStatus.UNCHANGED : CombatAwardStatus.APPLIED;
+            if (history.equals(old.restrictedKills()) && experience.equals(old.experience())) {
+                return new CombatAward(status, Optional.of(old), 0);
+            }
+            var saved = new CharacterRecord(old.id(), old.name(), old.revision().add(BigInteger.ONE), old.stats(),
+                level, experience, old.unspentPoints().add(BigInteger.valueOf(gained)), old.health(), old.learned(),
+                old.loadout(), old.cooldowns(), history, false, old.deathId(), old.diedAt());
+            repository.replace(saved, old.revision());
+            return new CombatAward(status, Optional.of(saved), gained);
+        });
+    }
+
+    public enum AbilityMutationStatus {
+        APPLIED, UNCHANGED, STALE, REQUIREMENTS, NO_POINTS, LOADOUT_FULL, ALREADY_LEARNED, NOT_LEARNED, COOLDOWN, UNAVAILABLE
+    }
+    public record AbilityMutation(AbilityMutationStatus status, Optional<CharacterRecord> record) { }
+
+    /** Unlock one validated registered ID and spend its points in the same expected revision. */
+    public CompletableFuture<AbilityMutation> unlockAbility(UUID characterId, BigInteger expectedRevision, String ability,
+            java.util.Map<Stat, BigInteger> requirements, BigInteger cost) {
+        Objects.requireNonNull(characterId); Objects.requireNonNull(expectedRevision); Objects.requireNonNull(ability);
+        Objects.requireNonNull(requirements); Objects.requireNonNull(cost);
+        if (ability.isBlank() || cost.signum() <= 0 || requirements.entrySet().stream().anyMatch(entry -> entry.getValue().compareTo(BigInteger.TEN) < 0)) {
+            throw new IllegalArgumentException("Invalid ability unlock");
+        }
+        return submit(() -> {
+            var found = repository.load(characterId);
+            if (found.isEmpty() || found.orElseThrow().dead()) return new AbilityMutation(AbilityMutationStatus.UNAVAILABLE, Optional.empty());
+            var old = found.orElseThrow();
+            if (!old.revision().equals(expectedRevision)) return new AbilityMutation(AbilityMutationStatus.STALE, Optional.of(old));
+            if (old.learned().contains(ability)) return new AbilityMutation(AbilityMutationStatus.ALREADY_LEARNED, Optional.of(old));
+            if (requirements.entrySet().stream().anyMatch(entry -> old.stats().get(entry.getKey()).compareTo(entry.getValue()) < 0)) {
+                return new AbilityMutation(AbilityMutationStatus.REQUIREMENTS, Optional.of(old));
+            }
+            if (old.unspentPoints().compareTo(cost) < 0) return new AbilityMutation(AbilityMutationStatus.NO_POINTS, Optional.of(old));
+            int slot = old.loadout().indexOf("");
+            if (slot < 0) return new AbilityMutation(AbilityMutationStatus.LOADOUT_FULL, Optional.of(old));
+            var learned = new java.util.HashSet<>(old.learned()); learned.add(ability);
+            var loadout = new java.util.ArrayList<>(old.loadout()); loadout.set(slot, ability);
+            var saved = new CharacterRecord(old.id(), old.name(), old.revision().add(BigInteger.ONE), old.stats(), old.level(),
+                old.experience(), old.unspentPoints().subtract(cost), old.health(), learned, loadout, old.cooldowns(),
+                old.restrictedKills(), false, old.deathId(), old.diedAt());
+            repository.replace(saved, old.revision());
+            return new AbilityMutation(AbilityMutationStatus.APPLIED, Optional.of(saved));
+        });
+    }
+
+    /** Refund one learned ability exactly once, clear every equipped reference and retain its deadline. */
+    public CompletableFuture<AbilityMutation> unlearnAbility(UUID characterId, BigInteger expectedRevision, String ability) {
+        Objects.requireNonNull(characterId); Objects.requireNonNull(expectedRevision); Objects.requireNonNull(ability);
+        if (ability.isBlank()) throw new IllegalArgumentException("Invalid ability refund");
+        return submit(() -> {
+            var found = repository.load(characterId);
+            if (found.isEmpty() || found.orElseThrow().dead()) return new AbilityMutation(AbilityMutationStatus.UNAVAILABLE, Optional.empty());
+            var old = found.orElseThrow();
+            if (!old.revision().equals(expectedRevision)) return new AbilityMutation(AbilityMutationStatus.STALE, Optional.of(old));
+            if (!old.learned().contains(ability)) return new AbilityMutation(AbilityMutationStatus.NOT_LEARNED, Optional.of(old));
+            var learned = new java.util.HashSet<>(old.learned()); learned.remove(ability);
+            var loadout = old.loadout().stream().map(assigned -> assigned.equals(ability) ? "" : assigned).toList();
+            var saved = new CharacterRecord(old.id(), old.name(), old.revision().add(BigInteger.ONE), old.stats(), old.level(),
+                old.experience(), old.unspentPoints().add(BigInteger.ONE), old.health(), learned, loadout, old.cooldowns(),
+                old.restrictedKills(), false, old.deathId(), old.diedAt());
+            repository.replace(saved, old.revision());
+            return new AbilityMutation(AbilityMutationStatus.APPLIED, Optional.of(saved));
+        });
+    }
+
+    /** Move one learned ability to one of the seven selectable slots without duplicating it. */
+    public CompletableFuture<AbilityMutation> assignAbility(UUID characterId, BigInteger expectedRevision,
+                                                             String ability, int slot) {
+        Objects.requireNonNull(characterId); Objects.requireNonNull(expectedRevision); Objects.requireNonNull(ability);
+        if (ability.isBlank() || slot < 0 || slot >= 7) throw new IllegalArgumentException("Invalid ability assignment");
+        return submit(() -> {
+            var found = repository.load(characterId);
+            if (found.isEmpty() || found.orElseThrow().dead()) return new AbilityMutation(AbilityMutationStatus.UNAVAILABLE, Optional.empty());
+            var old = found.orElseThrow();
+            if (!old.revision().equals(expectedRevision)) return new AbilityMutation(AbilityMutationStatus.STALE, Optional.of(old));
+            if (!old.learned().contains(ability)) return new AbilityMutation(AbilityMutationStatus.NOT_LEARNED, Optional.of(old));
+            var loadout = new java.util.ArrayList<>(old.loadout());
+            for (int index = 0; index < loadout.size(); index++) if (loadout.get(index).equals(ability)) loadout.set(index, "");
+            loadout.set(slot, ability);
+            if (loadout.equals(old.loadout())) return new AbilityMutation(AbilityMutationStatus.UNCHANGED, Optional.of(old));
+            var saved = new CharacterRecord(old.id(), old.name(), old.revision().add(BigInteger.ONE), old.stats(), old.level(),
+                old.experience(), old.unspentPoints(), old.health(), old.learned(), loadout, old.cooldowns(),
+                old.restrictedKills(), false, old.deathId(), old.diedAt());
+            repository.replace(saved, old.revision());
+            return new AbilityMutation(AbilityMutationStatus.APPLIED, Optional.of(saved));
+        });
+    }
+
+    /** Commit a real-time character/ability deadline before exposing the cast's native effect. */
+    public CompletableFuture<AbilityMutation> commitAbilityCooldown(UUID characterId, BigInteger expectedRevision,
+                                                                     String ability, Instant readyAt) {
+        Objects.requireNonNull(characterId); Objects.requireNonNull(expectedRevision); Objects.requireNonNull(ability);
+        Objects.requireNonNull(readyAt);
+        if (ability.isBlank()) throw new IllegalArgumentException("Invalid ability cooldown");
+        return submit(() -> {
+            var found = repository.load(characterId);
+            if (found.isEmpty() || found.orElseThrow().dead()) return new AbilityMutation(AbilityMutationStatus.UNAVAILABLE, Optional.empty());
+            var old = found.orElseThrow();
+            if (!old.revision().equals(expectedRevision)) return new AbilityMutation(AbilityMutationStatus.STALE, Optional.of(old));
+            if (!old.learned().contains(ability)) return new AbilityMutation(AbilityMutationStatus.NOT_LEARNED, Optional.of(old));
+            Instant previous = old.cooldowns().get(ability);
+            if (previous != null && previous.isAfter(clock.instant())) return new AbilityMutation(AbilityMutationStatus.COOLDOWN, Optional.of(old));
+            if (readyAt.equals(previous)) return new AbilityMutation(AbilityMutationStatus.UNCHANGED, Optional.of(old));
+            var cooldowns = new java.util.HashMap<>(old.cooldowns()); cooldowns.put(ability, readyAt);
+            var saved = new CharacterRecord(old.id(), old.name(), old.revision().add(BigInteger.ONE), old.stats(), old.level(),
+                old.experience(), old.unspentPoints(), old.health(), old.learned(), old.loadout(), cooldowns,
+                old.restrictedKills(), false, old.deathId(), old.diedAt());
+            repository.replace(saved, old.revision());
+            return new AbilityMutation(AbilityMutationStatus.APPLIED, Optional.of(saved));
+        });
+    }
+
+    public enum StatPurchaseStatus { APPLIED, STALE, NO_POINTS, UNAVAILABLE }
+    public record StatPurchase(StatPurchaseStatus status, Optional<CharacterRecord> record) { }
+
+    /** Persist one active-session stat purchase and its current native health as one revision. */
+    public CompletableFuture<StatPurchase> purchaseStat(UUID characterId, BigInteger expectedRevision, Stat stat,
+                                                         java.math.BigDecimal currentHealth,
+                                                         java.math.BigDecimal nativeLimit) {
+        Objects.requireNonNull(characterId);
+        Objects.requireNonNull(expectedRevision);
+        Objects.requireNonNull(stat);
+        Objects.requireNonNull(currentHealth);
+        Objects.requireNonNull(nativeLimit);
+        if (currentHealth.signum() < 0 || nativeLimit.signum() <= 0) {
+            throw new IllegalArgumentException("Invalid stat-purchase health bound");
+        }
+        return submit(() -> {
+            var found = repository.load(characterId);
+            if (found.isEmpty() || found.orElseThrow().dead()) {
+                return new StatPurchase(StatPurchaseStatus.UNAVAILABLE, Optional.empty());
+            }
+            var old = found.orElseThrow();
+            if (!old.revision().equals(expectedRevision)) {
+                return new StatPurchase(StatPurchaseStatus.STALE, Optional.of(old));
+            }
+            if (old.unspentPoints().signum() == 0) {
+                return new StatPurchase(StatPurchaseStatus.NO_POINTS, Optional.of(old));
+            }
+            var oldMaximum = old.maximumHealth().min(nativeLimit);
+            if (currentHealth.compareTo(oldMaximum) > 0) {
+                return new StatPurchase(StatPurchaseStatus.STALE, Optional.of(old));
+            }
+            var stats = new java.util.EnumMap<Stat, BigInteger>(Stat.class);
+            stats.putAll(old.stats());
+            stats.put(stat, stats.get(stat).add(BigInteger.ONE));
+            var rawMaximum = new java.math.BigDecimal(stats.get(Stat.CON).add(BigInteger.TEN));
+            var gain = rawMaximum.min(nativeLimit).subtract(oldMaximum);
+            var saved = new CharacterRecord(old.id(), old.name(), old.revision().add(BigInteger.ONE), stats,
+                old.level(), old.experience(), old.unspentPoints().subtract(BigInteger.ONE),
+                currentHealth.add(gain), old.learned(), old.loadout(), old.cooldowns(), old.restrictedKills(), false,
+                old.deathId(), old.diedAt());
+            repository.replace(saved, old.revision());
+            return new StatPurchase(StatPurchaseStatus.APPLIED, Optional.of(saved));
+        });
+    }
+
     /** Session-owned remaining health; retain all other current fields and reject concurrent revision changes. */
     public CompletableFuture<Optional<CharacterRecord>> saveHealth(UUID characterId, java.math.BigDecimal health,
                                                                   java.math.BigDecimal nativeLimit) {
+        return saveHealth(characterId, null, health, nativeLimit);
+    }
+
+    /** Ability-owned health mutation that refuses a changed character revision rather than healing stale state. */
+    public CompletableFuture<Optional<CharacterRecord>> saveHealth(UUID characterId, BigInteger expectedRevision,
+            java.math.BigDecimal health, java.math.BigDecimal nativeLimit) {
         Objects.requireNonNull(characterId);
         if (health.signum() < 0 || nativeLimit.signum() <= 0) throw new IllegalArgumentException("Invalid health bound");
         return submit(() -> {
             var found = repository.load(characterId);
             if (found.isEmpty() || found.orElseThrow().dead()) return Optional.empty();
             var old = found.orElseThrow();
+            if (expectedRevision != null && !old.revision().equals(expectedRevision)) return Optional.empty();
             var bounded = health.min(old.maximumHealth()).min(nativeLimit);
             if (old.health().compareTo(bounded) == 0) return Optional.of(old);
             var saved = new CharacterRecord(old.id(), old.name(), old.revision().add(BigInteger.ONE), old.stats(), old.level(),
                 old.experience(), old.unspentPoints(), bounded, old.learned(), old.loadout(), old.cooldowns(),
-                false, old.deathId(), old.diedAt());
+                old.restrictedKills(), false, old.deathId(), old.diedAt());
             repository.replace(saved, old.revision());
             return Optional.of(saved);
         });
@@ -254,27 +492,44 @@ public final class CharacterStorage implements AutoCloseable {
             if (old.dead() || expectedRevision != null && !old.revision().equals(expectedRevision)) return Optional.empty();
             var dead = new CharacterRecord(old.id(), old.name(), old.revision().add(BigInteger.ONE), old.stats(),
                 old.level(), old.experience(), old.unspentPoints(), java.math.BigDecimal.ZERO, old.learned(),
-                old.loadout(), old.cooldowns(), true, deathId, diedAt);
+                old.loadout(), old.cooldowns(), old.restrictedKills(), true, deathId, diedAt);
             repository.replace(dead, old.revision());
             return Optional.of(dead);
         });
     }
 
     public CompletableFuture<Optional<CharacterRecord>> restoreDeathRecord(UUID characterId, UUID deathId) {
-        Objects.requireNonNull(characterId);
-        Objects.requireNonNull(deathId);
+        return restoreDeathRecord(characterId, deathId, null);
+    }
+
+    /** Native Revive supplies the current plugin-controlled health ceiling captured on the server thread. */
+    public CompletableFuture<Optional<CharacterRecord>> restoreDeathRecord(UUID characterId, UUID deathId,
+                                                                            java.math.BigDecimal nativeLimit) {
+        return restore(characterId, deathId, nativeLimit, true);
+    }
+
+    /** Administrator revival retains death identity/consume-once checks but deliberately ignores death age. */
+    public CompletableFuture<Optional<CharacterRecord>> restoreDeathRecordAdministratively(
+            UUID characterId, UUID deathId, java.math.BigDecimal nativeLimit) {
+        return restore(characterId, deathId, nativeLimit, false);
+    }
+
+    private CompletableFuture<Optional<CharacterRecord>> restore(UUID characterId, UUID deathId,
+                                                                  java.math.BigDecimal nativeLimit, boolean ageLimited) {
+        Objects.requireNonNull(characterId); Objects.requireNonNull(deathId);
+        if (nativeLimit != null && nativeLimit.signum() <= 0) throw new IllegalArgumentException("Invalid revival health limit");
         Instant selectedAt = clock.instant();
         return submit(() -> {
             Optional<CharacterRecord> found = repository.load(characterId);
             if (found.isEmpty() || !found.orElseThrow().dead()) return Optional.empty();
             CharacterRecord old = found.orElseThrow();
             Duration age = Duration.between(old.diedAt(), selectedAt);
-            if (!deathId.equals(old.deathId()) || age.isNegative() || age.compareTo(Duration.ofHours(24)) >= 0) {
-                return Optional.empty();
-            }
+            if (!deathId.equals(old.deathId()) || age.isNegative()
+                    || ageLimited && age.compareTo(Duration.ofHours(24)) >= 0) return Optional.empty();
+            var health = nativeLimit == null ? old.maximumHealth() : old.maximumHealth().min(nativeLimit);
             var restored = new CharacterRecord(old.id(), old.name(), old.revision().add(BigInteger.ONE), old.stats(),
-                old.level(), old.experience(), old.unspentPoints(), old.maximumHealth(), old.learned(),
-                old.loadout(), old.cooldowns(), false, old.deathId(), old.diedAt());
+                old.level(), old.experience(), old.unspentPoints(), health, old.learned(), old.loadout(), old.cooldowns(),
+                old.restrictedKills(), false, old.deathId(), old.diedAt());
             repository.replace(restored, old.revision());
             return Optional.of(restored);
         });

src/main/java/games/dmg/fantasystick/persistence/CharacterYaml.java

@@ -46,6 +46,13 @@ final class CharacterYaml {
         record.cooldowns().entrySet().stream().sorted(Map.Entry.comparingByKey()).forEach(entry ->
             cooldowns.add(Map.of("ability", entry.getKey(), "ready-at", entry.getValue().toString())));
         root.put("cooldowns", cooldowns);
+        List<Map<String, String>> restrictedKills = new ArrayList<>();
+        record.restrictedKills().entrySet().stream().sorted(Map.Entry.comparingByKey()).forEach(entry -> {
+            var position = entry.getValue();
+            restrictedKills.add(Map.of("world", entry.getKey().toString(), "x", position.x().toString(),
+                "y", position.y().toString(), "z", position.z().toString()));
+        });
+        root.put("restricted-kills", restrictedKills);
         root.put("dead", record.dead());
         if (record.deathId() != null) {
             root.put("death-id", record.deathId().toString());
@@ -74,11 +81,19 @@ final class CharacterYaml {
                 throw new IllegalArgumentException("Duplicate cooldown");
             }
         }
+        Map<UUID, games.dmg.fantasystick.progression.CombatRewardRules.KillPosition> restrictedKills = new LinkedHashMap<>();
+        for (Object value : root.containsKey("restricted-kills") ? list(root.get("restricted-kills")) : List.of()) {
+            Map<?, ?> row = object(value);
+            UUID world = UUID.fromString(text(row.get("world")));
+            var position = new games.dmg.fantasystick.progression.CombatRewardRules.KillPosition(world,
+                new BigDecimal(text(row.get("x"))), new BigDecimal(text(row.get("y"))), new BigDecimal(text(row.get("z"))));
+            if (restrictedKills.putIfAbsent(world, position) != null) throw new IllegalArgumentException("Duplicate restricted-kill world");
+        }
         if (!(root.get("dead") instanceof Boolean dead)) throw new IllegalArgumentException("Missing dead flag");
         return new CharacterRecord(UUID.fromString(text(root.get("character-id"))), text(root.get("name")),
             number(root.get("revision")), stats, number(root.get("level")).intValueExact(),
             number(root.get("experience")), number(root.get("unspent-points")),
-            new BigDecimal(text(root.get("health"))), learned, strings(root.get("loadout")), cooldowns,
+            new BigDecimal(text(root.get("health"))), learned, strings(root.get("loadout")), cooldowns, restrictedKills,
             dead, root.containsKey("death-id") ? UUID.fromString(text(root.get("death-id"))) : null,
             root.containsKey("died-at") ? instant(root.get("died-at")) : null);
     }

src/main/java/games/dmg/fantasystick/persistence/FrostNovaSettings.java

@@ -0,0 +1,172 @@
+package games.dmg.fantasystick.persistence;
+
+import games.dmg.fantasystick.ability.FrostNova;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Serialized durable Frost Nova settings; publication remains a server-thread caller decision. */
+public final class FrostNovaSettings implements AutoCloseable {
+    private static final int MAX_BYTES = 1_048_576;
+    public static final String BASE = "frost-nova-base-damage";
+    public static final String COOLDOWN = "frost-nova-cooldown-seconds";
+    public static final String RADIUS = "frost-nova-radius-blocks";
+    public static final String SLOWNESS = "frost-nova-slowness-amplifier";
+    public static final String DURATION = "frost-nova-slowness-duration-seconds";
+    private static final List<String> KEYS = List.of(BASE, COOLDOWN, RADIUS, SLOWNESS, DURATION);
+    private static final Map<String, String> DEFAULTS = Map.of(
+        BASE, "5", COOLDOWN, "12", RADIUS, "5", SLOWNESS, "1", DURATION, "3");
+
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(String key, String value, FrostNova.Settings settings, Map<String, String> values, long sequence) {
+        public Update { values = Map.copyOf(values); }
+    }
+
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-frost-nova-configuration"));
+    private volatile Map<String, String> effectiveValues;
+    private Map<String, String> persistedValues;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public FrostNovaSettings(Path directory, Map<String, String> initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    FrostNovaSettings(Path directory, Map<String, String> initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath(); this.replacement = Objects.requireNonNull(replacement);
+        var copy = new LinkedHashMap<String, String>();
+        for (String key : KEYS) copy.put(key, Objects.requireNonNull(initial.get(key)));
+        parse(copy); effectiveValues = Map.copyOf(copy); persistedValues = Map.copyOf(copy);
+    }
+
+    public static List<String> keys() { return KEYS; }
+    public static String defaultValue(String key) { return DEFAULTS.get(key); }
+    public String value(String key) { return effectiveValues.get(key); }
+    public FrostNova.Settings settings() { return parse(effectiveValues); }
+
+    public synchronized void publish(Update update) {
+        Objects.requireNonNull(update);
+        if (update.sequence() <= publishedSequence) return;
+        parse(update.values()); effectiveValues = update.values(); publishedSequence = update.sequence();
+    }
+
+    public CompletionStage<Update> set(String key, String value) {
+        Objects.requireNonNull(key); Objects.requireNonNull(value);
+        if (!KEYS.contains(key)) return CompletableFuture.failedStage(new IllegalArgumentException("Unknown setting"));
+        String accepted = canonical(value); var preview = new LinkedHashMap<>(effectiveValues);
+        preview.put(key, accepted); parse(preview);
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    var next = new LinkedHashMap<>(persistedValues); next.put(key, accepted);
+                    var parsed = parse(next); save(key, accepted); persistedValues = Map.copyOf(next);
+                    return new Update(key, accepted, parsed, persistedValues, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(failure instanceof IllegalArgumentException
+                        ? failure : new IOException("Frost Nova configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished(); return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    private static String canonical(String raw) {
+        try { return new BigDecimal(raw).stripTrailingZeros().toPlainString(); }
+        catch (NumberFormatException invalid) { throw new IllegalArgumentException("Invalid value", invalid); }
+    }
+
+    public static FrostNova.Settings parse(Map<String, String> values) {
+        try { return new FrostNova.Settings(new BigDecimal(values.get(BASE)).toBigIntegerExact(),
+            seconds(values.get(COOLDOWN)), finite(values.get(RADIUS)),
+            new BigDecimal(values.get(SLOWNESS)).intValueExact(), seconds(values.get(DURATION))); }
+        catch (ArithmeticException | NumberFormatException | NullPointerException invalid) {
+            throw new IllegalArgumentException("Frost Nova settings must use supported numeric values", invalid);
+        }
+    }
+
+    private static Duration seconds(String value) {
+        var nanos = new BigDecimal(value).movePointRight(9).toBigIntegerExact().longValueExact();
+        return Duration.ofNanos(nanos);
+    }
+
+    private static double finite(String value) {
+        double result = new BigDecimal(value).doubleValue();
+        if (!Double.isFinite(result)) throw new IllegalArgumentException("Setting is not finite");
+        return result;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml"); var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS) && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) {
+            throw new IOException("Unsafe lock");
+        }
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                LinkOption.NOFOLLOW_LINKS); var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options)); Map<String, Object> document = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String savedKey)) throw new IOException("Invalid configuration key");
+                        document.put(savedKey, entry.getValue());
+                    }
+                }
+            }
+            document.put(key, value); byte[] bytes = yaml.dump(document).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() { pending--; if (closed && pending == 0) drained.complete(null); }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() { closed = true; worker.shutdown(); if (pending == 0) drained.complete(null); }
+}

src/main/java/games/dmg/fantasystick/persistence/FrostShardSettings.java

@@ -0,0 +1,198 @@
+package games.dmg.fantasystick.persistence;
+
+import games.dmg.fantasystick.ability.FrostShard;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Serialized durable Frost Shard settings; publication remains a server-thread caller decision. */
+public final class FrostShardSettings implements AutoCloseable {
+    private static final int MAX_BYTES = 1_048_576;
+    public static final String BASE_DAMAGE = "frost-shard-base-damage";
+    public static final String COOLDOWN = "frost-shard-cooldown-seconds";
+    public static final String RANGE = "frost-shard-range-blocks";
+    public static final String LIFETIME = "frost-shard-lifetime-seconds";
+    public static final String SPEED = "frost-shard-projectile-speed-blocks-per-tick";
+    public static final String AMPLIFIER = "frost-shard-slowness-amplifier";
+    public static final String SLOWNESS = "frost-shard-slowness-duration-seconds";
+    private static final List<String> KEYS = List.of(BASE_DAMAGE, COOLDOWN, LIFETIME, SPEED, RANGE, AMPLIFIER, SLOWNESS);
+    private static final Map<String, String> DEFAULTS = Map.of(BASE_DAMAGE, "4", COOLDOWN, "5", RANGE, "32",
+        LIFETIME, "5", SPEED, "1", AMPLIFIER, "0", SLOWNESS, "2");
+
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(String key, String value, FrostShard.Settings settings,
+                         Map<String, String> values, long sequence) {
+        public Update { values = Map.copyOf(values); }
+    }
+
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-frost-shard-configuration"));
+    private volatile Map<String, String> effectiveValues;
+    private Map<String, String> persistedValues;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public FrostShardSettings(Path directory, Map<String, String> initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    FrostShardSettings(Path directory, Map<String, String> initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath();
+        this.replacement = Objects.requireNonNull(replacement);
+        var copy = new LinkedHashMap<String, String>();
+        for (String key : KEYS) copy.put(key, Objects.requireNonNull(initial.get(key)));
+        parse(copy);
+        effectiveValues = Map.copyOf(copy); persistedValues = Map.copyOf(copy);
+    }
+
+    public static List<String> keys() { return KEYS; }
+    public static String defaultValue(String key) { return DEFAULTS.get(key); }
+    public String value(String key) { return effectiveValues.get(key); }
+    public FrostShard.Settings settings() { return parse(effectiveValues); }
+
+    /** Publish only after the caller returns the durable acknowledgment to the server thread. */
+    public synchronized void publish(Update update) {
+        Objects.requireNonNull(update);
+        if (update.sequence() <= publishedSequence) return;
+        parse(update.values());
+        effectiveValues = update.values(); publishedSequence = update.sequence();
+    }
+
+    public CompletionStage<Update> set(String key, String value) {
+        Objects.requireNonNull(key); Objects.requireNonNull(value);
+        if (!KEYS.contains(key)) return CompletableFuture.failedStage(new IllegalArgumentException("Unknown setting"));
+        String accepted = canonical(key, value);
+        var preview = new LinkedHashMap<>(effectiveValues); preview.put(key, accepted);
+        parse(preview); // Fail malformed/out-of-range command input before queueing accepted persistence.
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    var next = new LinkedHashMap<>(persistedValues);
+                    next.put(key, accepted);
+                    var parsed = parse(next);
+                    save(key, accepted);
+                    persistedValues = Map.copyOf(next);
+                    return new Update(key, accepted, parsed, persistedValues, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(failure instanceof IllegalArgumentException
+                        ? failure : new IOException("Frost Shard configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished();
+            return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    private static String canonical(String key, String raw) {
+        try {
+            if (key.equals(BASE_DAMAGE) || key.equals(AMPLIFIER)) return new java.math.BigInteger(raw).toString();
+            return new java.math.BigDecimal(raw).stripTrailingZeros().toPlainString();
+        } catch (NumberFormatException invalid) { throw new IllegalArgumentException("Invalid value", invalid); }
+    }
+
+    public static FrostShard.Settings parse(Map<String, String> values) {
+        try {
+            var base = new java.math.BigInteger(values.get(BASE_DAMAGE));
+            var cooldown = seconds(values.get(COOLDOWN));
+            double range = finite(values.get(RANGE));
+            var lifetime = seconds(values.get(LIFETIME));
+            double speed = finite(values.get(SPEED));
+            int amplifier = new java.math.BigInteger(values.get(AMPLIFIER)).intValueExact();
+            var slowness = seconds(values.get(SLOWNESS));
+            return new FrostShard.Settings(base, cooldown, range, lifetime, speed, amplifier, slowness);
+        } catch (ArithmeticException | NumberFormatException | NullPointerException invalid) {
+            throw new IllegalArgumentException("Frost Shard settings must use supported numeric values", invalid);
+        }
+    }
+
+    private static Duration seconds(String value) {
+        var nanos = new java.math.BigDecimal(value).movePointRight(9).toBigIntegerExact().longValueExact();
+        return Duration.ofNanos(nanos);
+    }
+
+    private static double finite(String value) {
+        double result = new java.math.BigDecimal(value).doubleValue();
+        if (!Double.isFinite(result)) throw new IllegalArgumentException("Setting is not finite");
+        return result;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml");
+        var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS)
+                && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe lock");
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                LinkOption.NOFOLLOW_LINKS); var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options));
+            Map<String, Object> document = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String savedKey)) throw new IOException("Invalid configuration key");
+                        document.put(savedKey, entry.getValue());
+                    }
+                }
+            }
+            document.put(key, value);
+            byte[] bytes = yaml.dump(document).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() {
+        pending--;
+        if (closed && pending == 0) drained.complete(null);
+    }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() {
+        closed = true; worker.shutdown(); if (pending == 0) drained.complete(null);
+    }
+}

src/main/java/games/dmg/fantasystick/persistence/GuardianBondSettings.java

@@ -0,0 +1,170 @@
+package games.dmg.fantasystick.persistence;
+
+import games.dmg.fantasystick.ability.GuardianBond;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Serialized durable Guardian Bond settings; publication remains a server-thread caller decision. */
+public final class GuardianBondSettings implements AutoCloseable {
+    private static final int MAX_BYTES = 1_048_576;
+    public static final String COOLDOWN = "guardian-bond-cooldown-seconds";
+    public static final String RANGE = "guardian-bond-range-blocks";
+    public static final String DURATION = "guardian-bond-duration-seconds";
+    public static final String REDIRECT = "guardian-bond-redirect-percent";
+    private static final List<String> KEYS = List.of(COOLDOWN, DURATION, RANGE, REDIRECT);
+    private static final Map<String, String> DEFAULTS = Map.of(
+        COOLDOWN, "20", RANGE, "10", DURATION, "6", REDIRECT, "30");
+
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(String key, String value, GuardianBond.Settings settings, Map<String, String> values, long sequence) {
+        public Update { values = Map.copyOf(values); }
+    }
+
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-guardian-bond-configuration"));
+    private volatile Map<String, String> effectiveValues;
+    private Map<String, String> persistedValues;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public GuardianBondSettings(Path directory, Map<String, String> initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    GuardianBondSettings(Path directory, Map<String, String> initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath(); this.replacement = Objects.requireNonNull(replacement);
+        var copy = new LinkedHashMap<String, String>();
+        for (String key : KEYS) copy.put(key, Objects.requireNonNull(initial.get(key)));
+        parse(copy); effectiveValues = Map.copyOf(copy); persistedValues = Map.copyOf(copy);
+    }
+
+    public static List<String> keys() { return KEYS; }
+    public static String defaultValue(String key) { return DEFAULTS.get(key); }
+    public String value(String key) { return effectiveValues.get(key); }
+    public GuardianBond.Settings settings() { return parse(effectiveValues); }
+
+    public synchronized void publish(Update update) {
+        Objects.requireNonNull(update);
+        if (update.sequence() <= publishedSequence) return;
+        parse(update.values()); effectiveValues = update.values(); publishedSequence = update.sequence();
+    }
+
+    public CompletionStage<Update> set(String key, String value) {
+        Objects.requireNonNull(key); Objects.requireNonNull(value);
+        if (!KEYS.contains(key)) return CompletableFuture.failedStage(new IllegalArgumentException("Unknown setting"));
+        String accepted = canonical(value); var preview = new LinkedHashMap<>(effectiveValues);
+        preview.put(key, accepted); parse(preview);
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    var next = new LinkedHashMap<>(persistedValues); next.put(key, accepted);
+                    var parsed = parse(next); save(key, accepted); persistedValues = Map.copyOf(next);
+                    return new Update(key, accepted, parsed, persistedValues, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(failure instanceof IllegalArgumentException
+                        ? failure : new IOException("Guardian Bond configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished(); return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    private static String canonical(String raw) {
+        try { return new BigDecimal(raw).stripTrailingZeros().toPlainString(); }
+        catch (NumberFormatException invalid) { throw new IllegalArgumentException("Invalid value", invalid); }
+    }
+
+    public static GuardianBond.Settings parse(Map<String, String> values) {
+        try { return new GuardianBond.Settings(seconds(values.get(COOLDOWN)), finite(values.get(RANGE)),
+            seconds(values.get(DURATION)), new BigDecimal(values.get(REDIRECT))); }
+        catch (ArithmeticException | NumberFormatException | NullPointerException invalid) {
+            throw new IllegalArgumentException("Guardian Bond settings must use supported numeric values", invalid);
+        }
+    }
+
+    private static Duration seconds(String value) {
+        var nanos = new BigDecimal(value).movePointRight(9).toBigIntegerExact().longValueExact();
+        return Duration.ofNanos(nanos);
+    }
+
+    private static double finite(String value) {
+        double result = new BigDecimal(value).doubleValue();
+        if (!Double.isFinite(result)) throw new IllegalArgumentException("Setting is not finite");
+        return result;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml"); var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS) && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) {
+            throw new IOException("Unsafe lock");
+        }
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                LinkOption.NOFOLLOW_LINKS); var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options)); Map<String, Object> document = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String savedKey)) throw new IOException("Invalid configuration key");
+                        document.put(savedKey, entry.getValue());
+                    }
+                }
+            }
+            document.put(key, value); byte[] bytes = yaml.dump(document).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() { pending--; if (closed && pending == 0) drained.complete(null); }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() { closed = true; worker.shutdown(); if (pending == 0) drained.complete(null); }
+}

src/main/java/games/dmg/fantasystick/persistence/HexSettings.java

@@ -0,0 +1,190 @@
+package games.dmg.fantasystick.persistence;
+
+import games.dmg.fantasystick.ability.Hex;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Serialized durable Hex settings; publication remains a server-thread caller decision. */
+public final class HexSettings implements AutoCloseable {
+    private static final int MAX_BYTES = 1_048_576;
+    public static final String COOLDOWN = "hex-cooldown-seconds";
+    public static final String RANGE = "hex-range-blocks";
+    public static final String DURATION = "hex-duration-seconds";
+    public static final String REDUCTION = "hex-damage-reduction-percent";
+    private static final List<String> KEYS = List.of(COOLDOWN, RANGE, DURATION, REDUCTION);
+    private static final Map<String, String> DEFAULTS = Map.of(COOLDOWN, "10", RANGE, "12", DURATION, "4", REDUCTION, "20");
+
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(String key, String value, Hex.Settings settings,
+                         Map<String, String> values, long sequence) {
+        public Update { values = Map.copyOf(values); }
+    }
+
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-hex-configuration"));
+    private volatile Map<String, String> effectiveValues;
+    private Map<String, String> persistedValues;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public HexSettings(Path directory, Map<String, String> initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    HexSettings(Path directory, Map<String, String> initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath();
+        this.replacement = Objects.requireNonNull(replacement);
+        var copy = new LinkedHashMap<String, String>();
+        for (String key : KEYS) copy.put(key, Objects.requireNonNull(initial.get(key)));
+        parse(copy);
+        effectiveValues = Map.copyOf(copy); persistedValues = Map.copyOf(copy);
+    }
+
+    public static List<String> keys() { return KEYS; }
+    public static String defaultValue(String key) { return DEFAULTS.get(key); }
+    public String value(String key) { return effectiveValues.get(key); }
+    public Hex.Settings settings() { return parse(effectiveValues); }
+
+    /** Publish only after the caller returns the durable acknowledgment to the server thread. */
+    public synchronized void publish(Update update) {
+        Objects.requireNonNull(update);
+        if (update.sequence() <= publishedSequence) return;
+        parse(update.values());
+        effectiveValues = update.values(); publishedSequence = update.sequence();
+    }
+
+    public CompletionStage<Update> set(String key, String value) {
+        Objects.requireNonNull(key); Objects.requireNonNull(value);
+        if (!KEYS.contains(key)) return CompletableFuture.failedStage(new IllegalArgumentException("Unknown setting"));
+        String accepted = canonical(key, value);
+        var preview = new LinkedHashMap<>(effectiveValues); preview.put(key, accepted);
+        parse(preview); // Fail malformed/out-of-range command input before queueing accepted persistence.
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    var next = new LinkedHashMap<>(persistedValues);
+                    next.put(key, accepted);
+                    var parsed = parse(next);
+                    save(key, accepted);
+                    persistedValues = Map.copyOf(next);
+                    return new Update(key, accepted, parsed, persistedValues, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(failure instanceof IllegalArgumentException
+                        ? failure : new IOException("Hex configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished();
+            return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    private static String canonical(String key, String raw) {
+        try {
+            return new java.math.BigDecimal(raw).stripTrailingZeros().toPlainString();
+        } catch (NumberFormatException invalid) { throw new IllegalArgumentException("Invalid value", invalid); }
+    }
+
+    public static Hex.Settings parse(Map<String, String> values) {
+        try {
+            var cooldown = seconds(values.get(COOLDOWN));
+            var range = finite(values.get(RANGE));
+            var duration = seconds(values.get(DURATION));
+            var reduction = new java.math.BigDecimal(values.get(REDUCTION));
+            return new Hex.Settings(cooldown, range, duration, reduction);
+        } catch (ArithmeticException | NumberFormatException | NullPointerException invalid) {
+            throw new IllegalArgumentException("Hex settings must use supported numeric values", invalid);
+        }
+    }
+
+    private static Duration seconds(String value) {
+        var nanos = new java.math.BigDecimal(value).movePointRight(9).toBigIntegerExact().longValueExact();
+        return Duration.ofNanos(nanos);
+    }
+
+    private static double finite(String value) {
+        double result = new java.math.BigDecimal(value).doubleValue();
+        if (!Double.isFinite(result)) throw new IllegalArgumentException("Setting is not finite");
+        return result;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml");
+        var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS)
+                && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe lock");
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                LinkOption.NOFOLLOW_LINKS); var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options));
+            Map<String, Object> document = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String savedKey)) throw new IOException("Invalid configuration key");
+                        document.put(savedKey, entry.getValue());
+                    }
+                }
+            }
+            document.put(key, value);
+            byte[] bytes = yaml.dump(document).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() {
+        pending--;
+        if (closed && pending == 0) drained.complete(null);
+    }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() {
+        closed = true; worker.shutdown(); if (pending == 0) drained.complete(null);
+    }
+}

src/main/java/games/dmg/fantasystick/persistence/InspireSettings.java

@@ -0,0 +1,191 @@
+package games.dmg.fantasystick.persistence;
+
+import games.dmg.fantasystick.ability.Inspire;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Serialized durable Inspire settings; publication remains a server-thread caller decision. */
+public final class InspireSettings implements AutoCloseable {
+    private static final int MAX_BYTES = 1_048_576;
+    public static final String BASE = "inspire-base-temporary-health";
+    public static final String COOLDOWN = "inspire-cooldown-seconds";
+    public static final String RANGE = "inspire-range-blocks";
+    public static final String DURATION = "inspire-duration-seconds";
+    private static final List<String> KEYS = List.of(BASE, COOLDOWN, RANGE, DURATION);
+    private static final Map<String, String> DEFAULTS = Map.of(BASE, "4", COOLDOWN, "15", RANGE, "12", DURATION, "6");
+
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(String key, String value, Inspire.Settings settings,
+                         Map<String, String> values, long sequence) {
+        public Update { values = Map.copyOf(values); }
+    }
+
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-inspire-configuration"));
+    private volatile Map<String, String> effectiveValues;
+    private Map<String, String> persistedValues;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public InspireSettings(Path directory, Map<String, String> initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    InspireSettings(Path directory, Map<String, String> initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath();
+        this.replacement = Objects.requireNonNull(replacement);
+        var copy = new LinkedHashMap<String, String>();
+        for (String key : KEYS) copy.put(key, Objects.requireNonNull(initial.get(key)));
+        parse(copy);
+        effectiveValues = Map.copyOf(copy); persistedValues = Map.copyOf(copy);
+    }
+
+    public static List<String> keys() { return KEYS; }
+    public static String defaultValue(String key) { return DEFAULTS.get(key); }
+    public String value(String key) { return effectiveValues.get(key); }
+    public Inspire.Settings settings() { return parse(effectiveValues); }
+
+    /** Publish only after the caller returns the durable acknowledgment to the server thread. */
+    public synchronized void publish(Update update) {
+        Objects.requireNonNull(update);
+        if (update.sequence() <= publishedSequence) return;
+        parse(update.values());
+        effectiveValues = update.values(); publishedSequence = update.sequence();
+    }
+
+    public CompletionStage<Update> set(String key, String value) {
+        Objects.requireNonNull(key); Objects.requireNonNull(value);
+        if (!KEYS.contains(key)) return CompletableFuture.failedStage(new IllegalArgumentException("Unknown setting"));
+        String accepted = canonical(key, value);
+        var preview = new LinkedHashMap<>(effectiveValues); preview.put(key, accepted);
+        parse(preview); // Fail malformed/out-of-range command input before queueing accepted persistence.
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    var next = new LinkedHashMap<>(persistedValues);
+                    next.put(key, accepted);
+                    var parsed = parse(next);
+                    save(key, accepted);
+                    persistedValues = Map.copyOf(next);
+                    return new Update(key, accepted, parsed, persistedValues, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(failure instanceof IllegalArgumentException
+                        ? failure : new IOException("Inspire configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished();
+            return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    private static String canonical(String key, String raw) {
+        try {
+            if (key.equals(BASE)) return new java.math.BigInteger(raw).toString();
+            return new java.math.BigDecimal(raw).stripTrailingZeros().toPlainString();
+        } catch (NumberFormatException invalid) { throw new IllegalArgumentException("Invalid value", invalid); }
+    }
+
+    public static Inspire.Settings parse(Map<String, String> values) {
+        try {
+            var base = new java.math.BigInteger(values.get(BASE));
+            var cooldown = seconds(values.get(COOLDOWN));
+            var range = finite(values.get(RANGE));
+            var duration = seconds(values.get(DURATION));
+            return new Inspire.Settings(base, cooldown, range, duration);
+        } catch (ArithmeticException | NumberFormatException | NullPointerException invalid) {
+            throw new IllegalArgumentException("Inspire settings must use supported numeric values", invalid);
+        }
+    }
+
+    private static Duration seconds(String value) {
+        var nanos = new java.math.BigDecimal(value).movePointRight(9).toBigIntegerExact().longValueExact();
+        return Duration.ofNanos(nanos);
+    }
+
+    private static double finite(String value) {
+        double result = new java.math.BigDecimal(value).doubleValue();
+        if (!Double.isFinite(result)) throw new IllegalArgumentException("Setting is not finite");
+        return result;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml");
+        var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS)
+                && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe lock");
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                LinkOption.NOFOLLOW_LINKS); var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options));
+            Map<String, Object> document = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String savedKey)) throw new IOException("Invalid configuration key");
+                        document.put(savedKey, entry.getValue());
+                    }
+                }
+            }
+            document.put(key, value);
+            byte[] bytes = yaml.dump(document).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() {
+        pending--;
+        if (closed && pending == 0) drained.complete(null);
+    }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() {
+        closed = true; worker.shutdown(); if (pending == 0) drained.complete(null);
+    }
+}

src/main/java/games/dmg/fantasystick/persistence/LongbowSettings.java

@@ -0,0 +1,201 @@
+package games.dmg.fantasystick.persistence;
+
+import games.dmg.fantasystick.ability.Longbow;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Serialized durable Longbow settings; publication remains a server-thread caller decision. */
+public final class LongbowSettings implements AutoCloseable {
+    private static final int MAX_BYTES = 1_048_576;
+    public static final String BASE_DAMAGE = "longbow-base-damage";
+    public static final String RECOVERY = "longbow-recovery-seconds";
+    public static final String MINIMUM_DRAW = "longbow-minimum-draw-ticks";
+    public static final String FULL_DRAW = "longbow-full-draw-ticks";
+    public static final String RANGE = "longbow-range-blocks";
+    public static final String LIFETIME = "longbow-lifetime-seconds";
+    public static final String FULL_SPEED = "longbow-full-projectile-speed-blocks-per-tick";
+    private static final List<String> KEYS = List.of(BASE_DAMAGE, RECOVERY, MINIMUM_DRAW, FULL_DRAW, RANGE,
+        LIFETIME, FULL_SPEED);
+    private static final Map<String, String> DEFAULTS = Map.of(BASE_DAMAGE, "5", RECOVERY, "1",
+        MINIMUM_DRAW, "3", FULL_DRAW, "20", RANGE, "64", LIFETIME, "10", FULL_SPEED, "3");
+
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(String key, String value, Longbow.Settings settings,
+                         Map<String, String> values, long sequence) {
+        public Update { values = Map.copyOf(values); }
+    }
+
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-longbow-configuration"));
+    private volatile Map<String, String> effectiveValues;
+    private Map<String, String> persistedValues;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public LongbowSettings(Path directory, Map<String, String> initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    LongbowSettings(Path directory, Map<String, String> initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath();
+        this.replacement = Objects.requireNonNull(replacement);
+        var copy = new LinkedHashMap<String, String>();
+        for (String key : KEYS) copy.put(key, Objects.requireNonNull(initial.get(key)));
+        parse(copy);
+        effectiveValues = Map.copyOf(copy); persistedValues = Map.copyOf(copy);
+    }
+
+    public static List<String> keys() { return KEYS; }
+    public static String defaultValue(String key) { return DEFAULTS.get(key); }
+    public String value(String key) { return effectiveValues.get(key); }
+    public Longbow.Settings settings() { return parse(effectiveValues); }
+
+    /** Publish only after the caller returns the durable acknowledgment to the server thread. */
+    public synchronized void publish(Update update) {
+        Objects.requireNonNull(update);
+        if (update.sequence() <= publishedSequence) return;
+        parse(update.values());
+        effectiveValues = update.values(); publishedSequence = update.sequence();
+    }
+
+    public CompletionStage<Update> set(String key, String value) {
+        Objects.requireNonNull(key); Objects.requireNonNull(value);
+        if (!KEYS.contains(key)) return CompletableFuture.failedStage(new IllegalArgumentException("Unknown setting"));
+        String accepted = canonical(key, value);
+        var preview = new LinkedHashMap<>(effectiveValues); preview.put(key, accepted);
+        parse(preview); // Fail malformed/out-of-range command input before queueing accepted persistence.
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    var next = new LinkedHashMap<>(persistedValues);
+                    next.put(key, accepted);
+                    var parsed = parse(next);
+                    save(key, accepted);
+                    persistedValues = Map.copyOf(next);
+                    return new Update(key, accepted, parsed, persistedValues, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(failure instanceof IllegalArgumentException
+                        ? failure : new IOException("Longbow configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished();
+            return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    private static String canonical(String key, String raw) {
+        try {
+            if (key.equals(BASE_DAMAGE) || key.equals(MINIMUM_DRAW) || key.equals(FULL_DRAW)) {
+                return new java.math.BigInteger(raw).toString();
+            }
+            return new java.math.BigDecimal(raw).stripTrailingZeros().toPlainString();
+        } catch (NumberFormatException invalid) { throw new IllegalArgumentException("Invalid value", invalid); }
+    }
+
+    public static Longbow.Settings parse(Map<String, String> values) {
+        try {
+            var base = new java.math.BigInteger(values.get(BASE_DAMAGE));
+            var recovery = seconds(values.get(RECOVERY));
+            int minimumDraw = new java.math.BigInteger(values.get(MINIMUM_DRAW)).intValueExact();
+            int fullDraw = new java.math.BigInteger(values.get(FULL_DRAW)).intValueExact();
+            double range = finite(values.get(RANGE));
+            var lifetime = seconds(values.get(LIFETIME));
+            double speed = finite(values.get(FULL_SPEED));
+            return new Longbow.Settings(base, recovery, minimumDraw, fullDraw, range, lifetime, speed);
+        } catch (ArithmeticException | NumberFormatException | NullPointerException invalid) {
+            throw new IllegalArgumentException("Longbow settings must use supported numeric values", invalid);
+        }
+    }
+
+    private static Duration seconds(String value) {
+        var nanos = new java.math.BigDecimal(value).movePointRight(9).toBigIntegerExact().longValueExact();
+        return Duration.ofNanos(nanos);
+    }
+
+    private static double finite(String value) {
+        double result = new java.math.BigDecimal(value).doubleValue();
+        if (!Double.isFinite(result)) throw new IllegalArgumentException("Setting is not finite");
+        return result;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml");
+        var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS)
+                && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe lock");
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                LinkOption.NOFOLLOW_LINKS); var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options));
+            Map<String, Object> document = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String savedKey)) throw new IOException("Invalid configuration key");
+                        document.put(savedKey, entry.getValue());
+                    }
+                }
+            }
+            document.put(key, value);
+            byte[] bytes = yaml.dump(document).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() {
+        pending--;
+        if (closed && pending == 0) drained.complete(null);
+    }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() {
+        closed = true; worker.shutdown(); if (pending == 0) drained.complete(null);
+    }
+}

src/main/java/games/dmg/fantasystick/persistence/MendingLightSettings.java

@@ -0,0 +1,172 @@
+package games.dmg.fantasystick.persistence;
+
+import games.dmg.fantasystick.ability.MendingLight;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.math.BigDecimal;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Serialized durable Mending Light settings; publication remains a server-thread caller decision. */
+public final class MendingLightSettings implements AutoCloseable {
+    private static final int MAX_BYTES = 1_048_576;
+    public static final String BASE_HEALING = "mending-light-base-healing";
+    public static final String COOLDOWN = "mending-light-cooldown-seconds";
+    public static final String RANGE = "mending-light-range-blocks";
+    private static final List<String> KEYS = List.of(BASE_HEALING, COOLDOWN, RANGE);
+    private static final Map<String, String> DEFAULTS = Map.of(BASE_HEALING, "6", COOLDOWN, "8", RANGE, "12");
+
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(String key, String value, MendingLight.Settings settings,
+                         Map<String, String> values, long sequence) {
+        public Update { values = Map.copyOf(values); }
+    }
+
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-mending-light-configuration"));
+    private volatile Map<String, String> effectiveValues;
+    private Map<String, String> persistedValues;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public MendingLightSettings(Path directory, Map<String, String> initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    MendingLightSettings(Path directory, Map<String, String> initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath(); this.replacement = Objects.requireNonNull(replacement);
+        var copy = new LinkedHashMap<String, String>();
+        for (String key : KEYS) copy.put(key, Objects.requireNonNull(initial.get(key)));
+        parse(copy); effectiveValues = Map.copyOf(copy); persistedValues = Map.copyOf(copy);
+    }
+
+    public static List<String> keys() { return KEYS; }
+    public static String defaultValue(String key) { return DEFAULTS.get(key); }
+    public String value(String key) { return effectiveValues.get(key); }
+    public MendingLight.Settings settings() { return parse(effectiveValues); }
+
+    public synchronized void publish(Update update) {
+        Objects.requireNonNull(update);
+        if (update.sequence() <= publishedSequence) return;
+        parse(update.values()); effectiveValues = update.values(); publishedSequence = update.sequence();
+    }
+
+    public CompletionStage<Update> set(String key, String value) {
+        Objects.requireNonNull(key); Objects.requireNonNull(value);
+        if (!KEYS.contains(key)) return CompletableFuture.failedStage(new IllegalArgumentException("Unknown setting"));
+        String accepted = canonical(key, value);
+        var preview = new LinkedHashMap<>(effectiveValues); preview.put(key, accepted); parse(preview);
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    var next = new LinkedHashMap<>(persistedValues); next.put(key, accepted);
+                    var parsed = parse(next); save(key, accepted); persistedValues = Map.copyOf(next);
+                    return new Update(key, accepted, parsed, persistedValues, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(failure instanceof IllegalArgumentException
+                        ? failure : new IOException("Mending Light configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished(); return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    private static String canonical(String key, String raw) {
+        try {
+            if (key.equals(BASE_HEALING)) return new java.math.BigInteger(raw).toString();
+            return new BigDecimal(raw).stripTrailingZeros().toPlainString();
+        } catch (NumberFormatException invalid) { throw new IllegalArgumentException("Invalid value", invalid); }
+    }
+
+    public static MendingLight.Settings parse(Map<String, String> values) {
+        try {
+            return new MendingLight.Settings(new java.math.BigInteger(values.get(BASE_HEALING)),
+                seconds(values.get(COOLDOWN)), finite(values.get(RANGE)));
+        } catch (ArithmeticException | NumberFormatException | NullPointerException invalid) {
+            throw new IllegalArgumentException("Mending Light settings must use supported numeric values", invalid);
+        }
+    }
+
+    private static Duration seconds(String value) {
+        var nanos = new BigDecimal(value).movePointRight(9).toBigIntegerExact().longValueExact();
+        return Duration.ofNanos(nanos);
+    }
+
+    private static double finite(String value) {
+        double result = new BigDecimal(value).doubleValue();
+        if (!Double.isFinite(result)) throw new IllegalArgumentException("Setting is not finite");
+        return result;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml"); var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS) && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) {
+            throw new IOException("Unsafe lock");
+        }
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                LinkOption.NOFOLLOW_LINKS); var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options)); Map<String, Object> document = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String savedKey)) throw new IOException("Invalid configuration key");
+                        document.put(savedKey, entry.getValue());
+                    }
+                }
+            }
+            document.put(key, value); byte[] bytes = yaml.dump(document).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() { pending--; if (closed && pending == 0) drained.complete(null); }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() { closed = true; worker.shutdown(); if (pending == 0) drained.complete(null); }
+}

src/main/java/games/dmg/fantasystick/persistence/MeteorSettings.java

@@ -0,0 +1,176 @@
+package games.dmg.fantasystick.persistence;
+
+import games.dmg.fantasystick.ability.Meteor;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Serialized durable Meteor settings; publication remains a server-thread caller decision. */
+public final class MeteorSettings implements AutoCloseable {
+    private static final int MAX_BYTES = 1_048_576;
+    public static final String BASE_DAMAGE = "meteor-base-damage";
+    public static final String COOLDOWN = "meteor-cooldown-seconds";
+    public static final String TARGET_RANGE = "meteor-target-range-blocks";
+    public static final String WARNING = "meteor-warning-seconds";
+    public static final String RADIUS = "meteor-radius-blocks";
+    public static final String VERTICAL = "meteor-vertical-range-blocks";
+    private static final List<String> KEYS = List.of(BASE_DAMAGE, COOLDOWN, TARGET_RANGE, WARNING, RADIUS, VERTICAL);
+    private static final Map<String, String> DEFAULTS = Map.of(
+        BASE_DAMAGE, "14", COOLDOWN, "45", TARGET_RANGE, "24", WARNING, "2", RADIUS, "5", VERTICAL, "4");
+
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(String key, String value, Meteor.Settings settings, Map<String, String> values, long sequence) {
+        public Update { values = Map.copyOf(values); }
+    }
+
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-meteor-configuration"));
+    private volatile Map<String, String> effectiveValues;
+    private Map<String, String> persistedValues;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public MeteorSettings(Path directory, Map<String, String> initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    MeteorSettings(Path directory, Map<String, String> initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath(); this.replacement = Objects.requireNonNull(replacement);
+        var copy = new LinkedHashMap<String, String>();
+        for (String key : KEYS) copy.put(key, Objects.requireNonNull(initial.get(key)));
+        parse(copy); effectiveValues = Map.copyOf(copy); persistedValues = Map.copyOf(copy);
+    }
+
+    public static List<String> keys() { return KEYS; }
+    public static String defaultValue(String key) { return DEFAULTS.get(key); }
+    public String value(String key) { return effectiveValues.get(key); }
+    public Meteor.Settings settings() { return parse(effectiveValues); }
+
+    public synchronized void publish(Update update) {
+        Objects.requireNonNull(update);
+        if (update.sequence() <= publishedSequence) return;
+        parse(update.values()); effectiveValues = update.values(); publishedSequence = update.sequence();
+    }
+
+    public CompletionStage<Update> set(String key, String value) {
+        Objects.requireNonNull(key); Objects.requireNonNull(value);
+        if (!KEYS.contains(key)) return CompletableFuture.failedStage(new IllegalArgumentException("Unknown setting"));
+        String accepted = canonical(value); var preview = new LinkedHashMap<>(effectiveValues);
+        preview.put(key, accepted); parse(preview);
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    var next = new LinkedHashMap<>(persistedValues); next.put(key, accepted);
+                    var parsed = parse(next); save(key, accepted); persistedValues = Map.copyOf(next);
+                    return new Update(key, accepted, parsed, persistedValues, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(failure instanceof IllegalArgumentException
+                        ? failure : new IOException("Meteor configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished(); return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    private static String canonical(String raw) {
+        try { return new BigDecimal(raw).stripTrailingZeros().toPlainString(); }
+        catch (NumberFormatException invalid) { throw new IllegalArgumentException("Invalid value", invalid); }
+    }
+
+    public static Meteor.Settings parse(Map<String, String> values) {
+        try { return new Meteor.Settings(new BigDecimal(values.get(BASE_DAMAGE)).toBigIntegerExact(),
+            seconds(values.get(COOLDOWN)), finite(values.get(TARGET_RANGE)), seconds(values.get(WARNING)),
+            finite(values.get(RADIUS)), finiteNonnegative(values.get(VERTICAL))); }
+        catch (ArithmeticException | NumberFormatException | NullPointerException invalid) {
+            throw new IllegalArgumentException("Meteor settings must use supported numeric values", invalid);
+        }
+    }
+
+    private static Duration seconds(String value) {
+        var nanos = new BigDecimal(value).movePointRight(9).toBigIntegerExact().longValueExact();
+        return Duration.ofNanos(nanos);
+    }
+
+    private static double finite(String value) {
+        double result = new BigDecimal(value).doubleValue();
+        if (!Double.isFinite(result)) throw new IllegalArgumentException("Setting is not finite");
+        return result;
+    }
+    private static double finiteNonnegative(String value) {
+        double result = finite(value); if (result < 0) throw new IllegalArgumentException("Setting is negative"); return result;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml"); var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS) && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) {
+            throw new IOException("Unsafe lock");
+        }
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                LinkOption.NOFOLLOW_LINKS); var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options)); Map<String, Object> document = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String savedKey)) throw new IOException("Invalid configuration key");
+                        document.put(savedKey, entry.getValue());
+                    }
+                }
+            }
+            document.put(key, value); byte[] bytes = yaml.dump(document).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() { pending--; if (closed && pending == 0) drained.complete(null); }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() { closed = true; worker.shutdown(); if (pending == 0) drained.complete(null); }
+}

src/main/java/games/dmg/fantasystick/persistence/PartySettings.java

@@ -0,0 +1,43 @@
+package games.dmg.fantasystick.persistence;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Durable save-before-publish policy for party capacity checks and book presentation. */
+public final class PartySettings implements AutoCloseable {
+    public static final String KEY="party-max-size";public static final String DEFAULT="6";
+    private static final int MAX_BYTES=1_048_576;
+    @FunctionalInterface interface Replacement{void move(Path from,Path to)throws IOException;}
+    public record Update(String value,int maximum,long sequence){}
+    private final Path directory;private final Replacement replacement;private final java.util.concurrent.ExecutorService worker=Executors.newSingleThreadExecutor(task->new Thread(task,"fantasy-party-configuration"));
+    private volatile int effective;private long persistedSequence,publishedSequence;private boolean closed;private int pending;private final CompletableFuture<Void> drained=new CompletableFuture<>();
+    public PartySettings(Path directory,int initial){this(directory,initial,(from,to)->Files.move(from,to,StandardCopyOption.ATOMIC_MOVE,StandardCopyOption.REPLACE_EXISTING));}
+    PartySettings(Path directory,int initial,Replacement replacement){this.directory=Objects.requireNonNull(directory).toAbsolutePath();this.replacement=Objects.requireNonNull(replacement);effective=validate(initial);}
+    public static int parse(Object value){if(value==null)return 6;if(!(value instanceof Number number))throw new IllegalArgumentException(KEY+" must be a positive whole number");try{return validate(new java.math.BigDecimal(number.toString()).intValueExact());}catch(ArithmeticException|NumberFormatException invalid){throw new IllegalArgumentException(KEY+" must be a representable positive whole number",invalid);}}
+    private static int parseText(String value){if(value==null||!value.matches("[0-9]+"))throw new IllegalArgumentException(KEY+" must be a positive whole number");try{return validate(new java.math.BigInteger(value).intValueExact());}catch(ArithmeticException|NumberFormatException invalid){throw new IllegalArgumentException(KEY+" must be a representable positive whole number",invalid);}}
+    private static int validate(int value){if(value<1)throw new IllegalArgumentException(KEY+" must be a positive whole number");return value;}
+    public int maximum(){return effective;}public String value(){return Integer.toString(effective);}
+    public CompletionStage<Update> set(String raw){int accepted=parseText(raw);synchronized(this){if(closed)return CompletableFuture.failedStage(new IOException("Configuration store is closed"));pending++;}try{return CompletableFuture.supplyAsync(()->{try{save(accepted);return new Update(Integer.toString(accepted),accepted,++persistedSequence);}catch(IOException|RuntimeException failure){throw new java.util.concurrent.CompletionException(new IOException("Party configuration save refused or failed; effective setting unchanged"));}finally{finished();}},worker).minimalCompletionStage();}catch(RejectedExecutionException rejected){finished();return CompletableFuture.failedStage(new IOException("Configuration store is closed"));}}
+    public synchronized boolean publish(Update update){if(update.sequence()<=publishedSequence)return false;effective=validate(update.maximum());publishedSequence=update.sequence();return true;}
+    private void save(int value)throws IOException{Files.createDirectories(directory);if(!Files.isDirectory(directory,LinkOption.NOFOLLOW_LINKS))throw new IOException("Unsafe directory");var file=directory.resolve("config.yml");var lockFile=directory.resolve(".config.lock");if(Files.exists(lockFile,LinkOption.NOFOLLOW_LINKS)&&!Files.isRegularFile(lockFile,LinkOption.NOFOLLOW_LINKS))throw new IOException("Unsafe lock");try(var channel=FileChannel.open(lockFile,StandardOpenOption.CREATE,StandardOpenOption.WRITE,LinkOption.NOFOLLOW_LINKS);var lock=channel.tryLock()){if(lock==null)throw new IOException("Configuration busy");var options=new LoaderOptions();options.setAllowDuplicateKeys(false);options.setMaxAliasesForCollections(20);options.setCodePointLimit(MAX_BYTES);var yaml=new Yaml(new SafeConstructor(options));Map<String,Object> values=new LinkedHashMap<>();if(Files.exists(file,LinkOption.NOFOLLOW_LINKS)){if(!Files.isRegularFile(file,LinkOption.NOFOLLOW_LINKS))throw new IOException("Unsafe configuration");byte[] bytes;try(var input=Files.newInputStream(file,LinkOption.NOFOLLOW_LINKS)){bytes=input.readNBytes(MAX_BYTES+1);}if(bytes.length>MAX_BYTES)throw new IOException("Configuration too large");Object loaded=yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());if(loaded!=null){if(!(loaded instanceof Map<?,?> map))throw new IOException("Invalid configuration root");for(var entry:map.entrySet()){if(!(entry.getKey() instanceof String key))throw new IOException("Invalid configuration key");values.put(key,entry.getValue());}}}values.put(KEY,value);byte[] bytes=yaml.dump(values).getBytes(StandardCharsets.UTF_8);if(bytes.length>MAX_BYTES)throw new IOException("Configuration too large");Path temporary=Files.createTempFile(directory,".config-",".tmp");try{try(var output=FileChannel.open(temporary,StandardOpenOption.WRITE,LinkOption.NOFOLLOW_LINKS)){var buffer=ByteBuffer.wrap(bytes);while(buffer.hasRemaining())output.write(buffer);output.force(true);}replacement.move(temporary,file);}finally{Files.deleteIfExists(temporary);}}catch(OverlappingFileLockException busy){throw new IOException("Configuration busy");}}
+    private synchronized void finished(){pending--;if(closed&&pending==0)drained.complete(null);}public CompletionStage<Void> drained(){return drained.minimalCompletionStage();}@Override public synchronized void close(){closed=true;worker.shutdown();if(pending==0)drained.complete(null);}
+}

src/main/java/games/dmg/fantasystick/persistence/PurifySettings.java

@@ -0,0 +1,166 @@
+package games.dmg.fantasystick.persistence;
+
+import games.dmg.fantasystick.ability.Purify;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Serialized durable Purify settings; publication remains a server-thread caller decision. */
+public final class PurifySettings implements AutoCloseable {
+    private static final int MAX_BYTES = 1_048_576;
+    public static final String COOLDOWN = "purify-cooldown-seconds";
+    public static final String RANGE = "purify-range-blocks";
+    private static final List<String> KEYS = List.of(COOLDOWN, RANGE);
+    private static final Map<String, String> DEFAULTS = Map.of(COOLDOWN, "15", RANGE, "12");
+
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(String key, String value, Purify.Settings settings, Map<String, String> values, long sequence) {
+        public Update { values = Map.copyOf(values); }
+    }
+
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-purify-configuration"));
+    private volatile Map<String, String> effectiveValues;
+    private Map<String, String> persistedValues;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public PurifySettings(Path directory, Map<String, String> initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    PurifySettings(Path directory, Map<String, String> initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath(); this.replacement = Objects.requireNonNull(replacement);
+        var copy = new LinkedHashMap<String, String>();
+        for (String key : KEYS) copy.put(key, Objects.requireNonNull(initial.get(key)));
+        parse(copy); effectiveValues = Map.copyOf(copy); persistedValues = Map.copyOf(copy);
+    }
+
+    public static List<String> keys() { return KEYS; }
+    public static String defaultValue(String key) { return DEFAULTS.get(key); }
+    public String value(String key) { return effectiveValues.get(key); }
+    public Purify.Settings settings() { return parse(effectiveValues); }
+
+    public synchronized void publish(Update update) {
+        Objects.requireNonNull(update);
+        if (update.sequence() <= publishedSequence) return;
+        parse(update.values()); effectiveValues = update.values(); publishedSequence = update.sequence();
+    }
+
+    public CompletionStage<Update> set(String key, String value) {
+        Objects.requireNonNull(key); Objects.requireNonNull(value);
+        if (!KEYS.contains(key)) return CompletableFuture.failedStage(new IllegalArgumentException("Unknown setting"));
+        String accepted = canonical(value); var preview = new LinkedHashMap<>(effectiveValues);
+        preview.put(key, accepted); parse(preview);
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    var next = new LinkedHashMap<>(persistedValues); next.put(key, accepted);
+                    var parsed = parse(next); save(key, accepted); persistedValues = Map.copyOf(next);
+                    return new Update(key, accepted, parsed, persistedValues, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(failure instanceof IllegalArgumentException
+                        ? failure : new IOException("Purify configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished(); return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    private static String canonical(String raw) {
+        try { return new BigDecimal(raw).stripTrailingZeros().toPlainString(); }
+        catch (NumberFormatException invalid) { throw new IllegalArgumentException("Invalid value", invalid); }
+    }
+
+    public static Purify.Settings parse(Map<String, String> values) {
+        try { return new Purify.Settings(seconds(values.get(COOLDOWN)), finite(values.get(RANGE))); }
+        catch (ArithmeticException | NumberFormatException | NullPointerException invalid) {
+            throw new IllegalArgumentException("Purify settings must use supported numeric values", invalid);
+        }
+    }
+
+    private static Duration seconds(String value) {
+        var nanos = new BigDecimal(value).movePointRight(9).toBigIntegerExact().longValueExact();
+        return Duration.ofNanos(nanos);
+    }
+
+    private static double finite(String value) {
+        double result = new BigDecimal(value).doubleValue();
+        if (!Double.isFinite(result)) throw new IllegalArgumentException("Setting is not finite");
+        return result;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml"); var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS) && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) {
+            throw new IOException("Unsafe lock");
+        }
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                LinkOption.NOFOLLOW_LINKS); var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options)); Map<String, Object> document = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String savedKey)) throw new IOException("Invalid configuration key");
+                        document.put(savedKey, entry.getValue());
+                    }
+                }
+            }
+            document.put(key, value); byte[] bytes = yaml.dump(document).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() { pending--; if (closed && pending == 0) drained.complete(null); }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() { closed = true; worker.shutdown(); if (pending == 0) drained.complete(null); }
+}

src/main/java/games/dmg/fantasystick/persistence/QuickstepSettings.java

@@ -0,0 +1,188 @@
+package games.dmg.fantasystick.persistence;
+
+import games.dmg.fantasystick.ability.Quickstep;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Serialized durable Quickstep settings; publication remains a server-thread caller decision. */
+public final class QuickstepSettings implements AutoCloseable {
+    private static final int MAX_BYTES = 1_048_576;
+    public static final String COOLDOWN = "quickstep-cooldown-seconds";
+    public static final String DISTANCE = "quickstep-distance-blocks";
+    public static final String SPEED = "quickstep-speed-blocks-per-tick";
+    private static final List<String> KEYS = List.of(COOLDOWN, DISTANCE, SPEED);
+    private static final Map<String, String> DEFAULTS = Map.of(COOLDOWN, "5", DISTANCE, "4", SPEED, "1");
+
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(String key, String value, Quickstep.Settings settings,
+                         Map<String, String> values, long sequence) {
+        public Update { values = Map.copyOf(values); }
+    }
+
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-quickstep-configuration"));
+    private volatile Map<String, String> effectiveValues;
+    private Map<String, String> persistedValues;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public QuickstepSettings(Path directory, Map<String, String> initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    QuickstepSettings(Path directory, Map<String, String> initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath();
+        this.replacement = Objects.requireNonNull(replacement);
+        var copy = new LinkedHashMap<String, String>();
+        for (String key : KEYS) copy.put(key, Objects.requireNonNull(initial.get(key)));
+        parse(copy);
+        effectiveValues = Map.copyOf(copy); persistedValues = Map.copyOf(copy);
+    }
+
+    public static List<String> keys() { return KEYS; }
+    public static String defaultValue(String key) { return DEFAULTS.get(key); }
+    public String value(String key) { return effectiveValues.get(key); }
+    public Quickstep.Settings settings() { return parse(effectiveValues); }
+
+    /** Publish only after the caller returns the durable acknowledgment to the server thread. */
+    public synchronized void publish(Update update) {
+        Objects.requireNonNull(update);
+        if (update.sequence() <= publishedSequence) return;
+        parse(update.values());
+        effectiveValues = update.values(); publishedSequence = update.sequence();
+    }
+
+    public CompletionStage<Update> set(String key, String value) {
+        Objects.requireNonNull(key); Objects.requireNonNull(value);
+        if (!KEYS.contains(key)) return CompletableFuture.failedStage(new IllegalArgumentException("Unknown setting"));
+        String accepted = canonical(key, value);
+        var preview = new LinkedHashMap<>(effectiveValues); preview.put(key, accepted);
+        parse(preview); // Fail malformed/out-of-range command input before queueing accepted persistence.
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    var next = new LinkedHashMap<>(persistedValues);
+                    next.put(key, accepted);
+                    var parsed = parse(next);
+                    save(key, accepted);
+                    persistedValues = Map.copyOf(next);
+                    return new Update(key, accepted, parsed, persistedValues, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(failure instanceof IllegalArgumentException
+                        ? failure : new IOException("Quickstep configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished();
+            return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    private static String canonical(String key, String raw) {
+        try {
+            return new java.math.BigDecimal(raw).stripTrailingZeros().toPlainString();
+        } catch (NumberFormatException invalid) { throw new IllegalArgumentException("Invalid value", invalid); }
+    }
+
+    public static Quickstep.Settings parse(Map<String, String> values) {
+        try {
+            var cooldown = seconds(values.get(COOLDOWN));
+            double distance = finite(values.get(DISTANCE));
+            double speed = finite(values.get(SPEED));
+            return new Quickstep.Settings(cooldown, distance, speed);
+        } catch (ArithmeticException | NumberFormatException | NullPointerException invalid) {
+            throw new IllegalArgumentException("Quickstep settings must use supported numeric values", invalid);
+        }
+    }
+
+    private static Duration seconds(String value) {
+        var nanos = new java.math.BigDecimal(value).movePointRight(9).toBigIntegerExact().longValueExact();
+        return Duration.ofNanos(nanos);
+    }
+
+    private static double finite(String value) {
+        double result = new java.math.BigDecimal(value).doubleValue();
+        if (!Double.isFinite(result)) throw new IllegalArgumentException("Setting is not finite");
+        return result;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml");
+        var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS)
+                && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe lock");
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                LinkOption.NOFOLLOW_LINKS); var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options));
+            Map<String, Object> document = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String savedKey)) throw new IOException("Invalid configuration key");
+                        document.put(savedKey, entry.getValue());
+                    }
+                }
+            }
+            document.put(key, value);
+            byte[] bytes = yaml.dump(document).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() {
+        pending--;
+        if (closed && pending == 0) drained.complete(null);
+    }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() {
+        closed = true; worker.shutdown(); if (pending == 0) drained.complete(null);
+    }
+}

src/main/java/games/dmg/fantasystick/persistence/RallyingCrySettings.java

@@ -0,0 +1,172 @@
+package games.dmg.fantasystick.persistence;
+
+import games.dmg.fantasystick.ability.RallyingCry;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Serialized durable Rallying Cry settings; publication remains a server-thread caller decision. */
+public final class RallyingCrySettings implements AutoCloseable {
+    private static final int MAX_BYTES = 1_048_576;
+    public static final String COOLDOWN = "rallying-cry-cooldown-seconds";
+    public static final String RADIUS = "rallying-cry-radius-blocks";
+    public static final String DURATION = "rallying-cry-duration-seconds";
+    public static final String SPEED = "rallying-cry-speed-amplifier";
+    public static final String BONUS = "rallying-cry-damage-bonus-percent";
+    private static final List<String> KEYS = List.of(COOLDOWN, BONUS, DURATION, RADIUS, SPEED);
+    private static final Map<String, String> DEFAULTS = Map.of(
+        COOLDOWN, "25", RADIUS, "8", DURATION, "6", SPEED, "0", BONUS, "20");
+
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(String key, String value, RallyingCry.Settings settings, Map<String, String> values, long sequence) {
+        public Update { values = Map.copyOf(values); }
+    }
+
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-rallying-cry-configuration"));
+    private volatile Map<String, String> effectiveValues;
+    private Map<String, String> persistedValues;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public RallyingCrySettings(Path directory, Map<String, String> initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    RallyingCrySettings(Path directory, Map<String, String> initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath(); this.replacement = Objects.requireNonNull(replacement);
+        var copy = new LinkedHashMap<String, String>();
+        for (String key : KEYS) copy.put(key, Objects.requireNonNull(initial.get(key)));
+        parse(copy); effectiveValues = Map.copyOf(copy); persistedValues = Map.copyOf(copy);
+    }
+
+    public static List<String> keys() { return KEYS; }
+    public static String defaultValue(String key) { return DEFAULTS.get(key); }
+    public String value(String key) { return effectiveValues.get(key); }
+    public RallyingCry.Settings settings() { return parse(effectiveValues); }
+
+    public synchronized void publish(Update update) {
+        Objects.requireNonNull(update);
+        if (update.sequence() <= publishedSequence) return;
+        parse(update.values()); effectiveValues = update.values(); publishedSequence = update.sequence();
+    }
+
+    public CompletionStage<Update> set(String key, String value) {
+        Objects.requireNonNull(key); Objects.requireNonNull(value);
+        if (!KEYS.contains(key)) return CompletableFuture.failedStage(new IllegalArgumentException("Unknown setting"));
+        String accepted = canonical(value); var preview = new LinkedHashMap<>(effectiveValues);
+        preview.put(key, accepted); parse(preview);
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    var next = new LinkedHashMap<>(persistedValues); next.put(key, accepted);
+                    var parsed = parse(next); save(key, accepted); persistedValues = Map.copyOf(next);
+                    return new Update(key, accepted, parsed, persistedValues, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(failure instanceof IllegalArgumentException
+                        ? failure : new IOException("Rallying Cry configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished(); return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    private static String canonical(String raw) {
+        try { return new BigDecimal(raw).stripTrailingZeros().toPlainString(); }
+        catch (NumberFormatException invalid) { throw new IllegalArgumentException("Invalid value", invalid); }
+    }
+
+    public static RallyingCry.Settings parse(Map<String, String> values) {
+        try { return new RallyingCry.Settings(seconds(values.get(COOLDOWN)), finite(values.get(RADIUS)),
+            seconds(values.get(DURATION)), new BigDecimal(values.get(SPEED)).intValueExact(),
+            new BigDecimal(values.get(BONUS))); }
+        catch (ArithmeticException | NumberFormatException | NullPointerException invalid) {
+            throw new IllegalArgumentException("Rallying Cry settings must use supported numeric values", invalid);
+        }
+    }
+
+    private static Duration seconds(String value) {
+        var nanos = new BigDecimal(value).movePointRight(9).toBigIntegerExact().longValueExact();
+        return Duration.ofNanos(nanos);
+    }
+
+    private static double finite(String value) {
+        double result = new BigDecimal(value).doubleValue();
+        if (!Double.isFinite(result)) throw new IllegalArgumentException("Setting is not finite");
+        return result;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml"); var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS) && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) {
+            throw new IOException("Unsafe lock");
+        }
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                LinkOption.NOFOLLOW_LINKS); var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options)); Map<String, Object> document = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String savedKey)) throw new IOException("Invalid configuration key");
+                        document.put(savedKey, entry.getValue());
+                    }
+                }
+            }
+            document.put(key, value); byte[] bytes = yaml.dump(document).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() { pending--; if (closed && pending == 0) drained.complete(null); }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() { closed = true; worker.shutdown(); if (pending == 0) drained.complete(null); }
+}

src/main/java/games/dmg/fantasystick/persistence/RevivalStore.java

@@ -0,0 +1,167 @@
+package games.dmg.fantasystick.persistence;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Feature-scoped Revive interruption proof; never authority to guess or mint an item. */
+public final class RevivalStore implements AutoCloseable {
+    private static final int MAX_FILE_BYTES = 32_768;
+    private static final int MAX_FILES = 4096;
+    private static final Set<String> KEYS_V1 = Set.of("schema-version", "reservation-id", "caster-character-id",
+        "target-player-id", "character-id", "death-id", "created-at", "source-slot", "source-amount", "destination-slot");
+    private static final Set<String> KEYS_V2 = java.util.stream.Stream.concat(KEYS_V1.stream(), java.util.stream.Stream.of("administrative"))
+        .collect(java.util.stream.Collectors.toUnmodifiableSet());
+    public record Reservation(UUID id, UUID casterCharacter, UUID targetPlayer, UUID character, UUID death,
+                              Instant createdAt, int sourceSlot, int sourceAmount, int destinationSlot, boolean administrative) {
+        public Reservation(UUID id, UUID casterCharacter, UUID targetPlayer, UUID character, UUID death,
+                           Instant createdAt, int sourceSlot, int sourceAmount, int destinationSlot) {
+            this(id, casterCharacter, targetPlayer, character, death, createdAt, sourceSlot, sourceAmount, destinationSlot, false);
+        }
+        public Reservation {
+            Objects.requireNonNull(id); Objects.requireNonNull(casterCharacter); Objects.requireNonNull(targetPlayer);
+            Objects.requireNonNull(character); Objects.requireNonNull(death); Objects.requireNonNull(createdAt);
+            if (createdAt.getNano() != 0 || sourceSlot < 0 || sourceSlot > 40 || sourceSlot > 35 && sourceSlot != 40
+                    || sourceAmount < 1 || sourceAmount > 99 || destinationSlot < -1 || destinationSlot > 40
+                    || destinationSlot > 35 && destinationSlot != 40 || destinationSlot == sourceSlot) {
+                throw new IllegalArgumentException("Invalid revival reservation");
+            }
+        }
+    }
+
+    private final Path directory;
+    private final ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-revival-persistence"));
+
+    public RevivalStore(Path pluginDataDirectory) {
+        directory = Objects.requireNonNull(pluginDataDirectory).resolve("revivals").toAbsolutePath();
+    }
+
+    public CompletableFuture<Optional<Reservation>> reserve(Reservation reservation) {
+        Objects.requireNonNull(reservation);
+        return submit(() -> {
+            Path file = file(reservation.character());
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) return Optional.empty();
+            safeDirectory();
+            Path temporary = directory.resolve("." + reservation.character() + "." + UUID.randomUUID() + ".tmp");
+            try {
+                Files.writeString(temporary, encode(reservation), StandardCharsets.UTF_8,
+                    StandardOpenOption.CREATE_NEW, StandardOpenOption.WRITE);
+                Files.move(temporary, file, StandardCopyOption.ATOMIC_MOVE);
+            } finally { Files.deleteIfExists(temporary); }
+            return Optional.of(reservation);
+        });
+    }
+
+    public CompletableFuture<Optional<Reservation>> find(UUID character) {
+        Objects.requireNonNull(character);
+        return submit(() -> load(file(character)));
+    }
+
+    public CompletableFuture<List<Reservation>> target(UUID player) {
+        Objects.requireNonNull(player);
+        return submit(() -> {
+            if (!Files.exists(directory, LinkOption.NOFOLLOW_LINKS)) return List.of();
+            if (Files.isSymbolicLink(directory) || !Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) {
+                throw new IOException("Unsafe revival directory");
+            }
+            var result = new ArrayList<Reservation>();
+            try (var files = Files.list(directory)) {
+                for (var path : files.limit(MAX_FILES + 1).toList()) {
+                    if (result.size() >= MAX_FILES) throw new IOException("Too many revival reservations");
+                    if (!path.getFileName().toString().endsWith(".yml")) continue;
+                    var reservation = load(path).orElseThrow(() -> new IOException("Missing revival reservation"));
+                    if (reservation.targetPlayer().equals(player)) result.add(reservation);
+                }
+            }
+            return List.copyOf(result);
+        });
+    }
+
+    public CompletableFuture<Boolean> clear(UUID character, UUID reservation) {
+        Objects.requireNonNull(character); Objects.requireNonNull(reservation);
+        return submit(() -> {
+            var found = load(file(character));
+            if (found.isEmpty() || !found.orElseThrow().id().equals(reservation)) return false;
+            return Files.deleteIfExists(file(character));
+        });
+    }
+
+    private void safeDirectory() throws IOException {
+        if (Files.exists(directory, LinkOption.NOFOLLOW_LINKS)) {
+            if (Files.isSymbolicLink(directory) || !Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) {
+                throw new IOException("Unsafe revival directory");
+            }
+        } else Files.createDirectories(directory);
+    }
+
+    private Path file(UUID character) { return directory.resolve(character + ".yml"); }
+
+    private Optional<Reservation> load(Path file) throws IOException {
+        if (!Files.exists(file, LinkOption.NOFOLLOW_LINKS)) return Optional.empty();
+        if (Files.isSymbolicLink(file) || !Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)
+                || Files.size(file) > MAX_FILE_BYTES) throw new IOException("Unsafe revival reservation");
+        Object decoded;
+        try {
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false); options.setMaxAliasesForCollections(0);
+            decoded = new Yaml(new SafeConstructor(options)).load(Files.readString(file, StandardCharsets.UTF_8));
+        } catch (RuntimeException invalid) { throw new IOException("Invalid revival reservation", invalid); }
+        if (!(decoded instanceof Map<?, ?> raw) || !(raw.keySet().equals(KEYS_V1) || raw.keySet().equals(KEYS_V2))) throw new IOException("Invalid revival reservation keys");
+        try {
+            String schema=text(raw,"schema-version");if(!(schema.equals("1")&&raw.keySet().equals(KEYS_V1)||schema.equals("2")&&raw.keySet().equals(KEYS_V2)))throw new IllegalArgumentException("schema");
+            var value = new Reservation(uuid(raw, "reservation-id"), uuid(raw, "caster-character-id"),
+                uuid(raw, "target-player-id"), uuid(raw, "character-id"), uuid(raw, "death-id"),
+                Instant.parse(text(raw, "created-at")), integer(raw, "source-slot"), integer(raw, "source-amount"),
+                integer(raw, "destination-slot"), schema.equals("2") && bool(raw,"administrative"));
+            if (!file.getFileName().toString().equals(value.character() + ".yml")) throw new IllegalArgumentException("identity");
+            return Optional.of(value);
+        } catch (RuntimeException invalid) { throw new IOException("Invalid revival reservation", invalid); }
+    }
+
+    private static String encode(Reservation value) {
+        var map = new LinkedHashMap<String, Object>();
+        map.put("schema-version", "2"); map.put("reservation-id", value.id().toString());
+        map.put("caster-character-id", value.casterCharacter().toString()); map.put("target-player-id", value.targetPlayer().toString());
+        map.put("character-id", value.character().toString()); map.put("death-id", value.death().toString());
+        map.put("created-at", value.createdAt().toString()); map.put("source-slot", Integer.toString(value.sourceSlot()));
+        map.put("source-amount", Integer.toString(value.sourceAmount())); map.put("destination-slot", Integer.toString(value.destinationSlot()));
+        map.put("administrative", Boolean.toString(value.administrative()));
+        return new Yaml().dump(map);
+    }
+
+    private static String text(Map<?, ?> map, String key) {
+        Object value = map.get(key); if (!(value instanceof String text) || text.isBlank()) throw new IllegalArgumentException(key); return text;
+    }
+    private static UUID uuid(Map<?, ?> map, String key) { var value = UUID.fromString(text(map, key)); if (!value.toString().equals(text(map, key))) throw new IllegalArgumentException(key); return value; }
+    private static int integer(Map<?, ?> map, String key) { return Integer.parseInt(text(map, key)); }
+    private static boolean bool(Map<?,?> map,String key){String value=text(map,key);if(!value.equals("true")&&!value.equals("false"))throw new IllegalArgumentException(key);return Boolean.parseBoolean(value);}
+
+    @FunctionalInterface private interface Work<T> { T run() throws IOException; }
+    private <T> CompletableFuture<T> submit(Work<T> work) {
+        try {
+            return CompletableFuture.supplyAsync(() -> { try { return work.run(); } catch (IOException error) { throw new CompletionException(error); } }, worker);
+        } catch (RejectedExecutionException rejected) { return CompletableFuture.failedFuture(rejected); }
+    }
+    @Override public void close() { worker.shutdown(); }
+}

src/main/java/games/dmg/fantasystick/persistence/RoleplaySettings.java

@@ -0,0 +1,152 @@
+package games.dmg.fantasystick.persistence;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Durable save-before-publish policy for roleplay availability and coordinated exits. */
+public final class RoleplaySettings implements AutoCloseable {
+    public static final String KEY = "roleplay-disabled";
+    private static final int MAX_BYTES = 1_048_576;
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(boolean disabled, long sequence) { }
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-roleplay-configuration"));
+    private volatile boolean disabled;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public RoleplaySettings(Path directory, boolean initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    RoleplaySettings(Path directory, boolean initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath();
+        this.replacement = Objects.requireNonNull(replacement);
+        disabled = initial;
+    }
+
+    public static boolean parse(Object value) {
+        if (value == null) return false;
+        if (value instanceof Boolean parsed) return parsed;
+        throw new IllegalArgumentException(KEY + " must be true or false");
+    }
+
+    public boolean disabled() { return disabled; }
+    public String value() { return Boolean.toString(disabled); }
+
+    public CompletionStage<Update> set(String raw) {
+        if (!"true".equals(raw) && !"false".equals(raw)) {
+            throw new IllegalArgumentException(KEY + " must be true or false");
+        }
+        boolean accepted = Boolean.parseBoolean(raw);
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    save(accepted);
+                    return new Update(accepted, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(new IOException(
+                        "Roleplay configuration save refused or failed; effective setting unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished();
+            return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    public synchronized boolean publish(Update update) {
+        if (update.sequence() <= publishedSequence) return false;
+        disabled = update.disabled();
+        publishedSequence = update.sequence();
+        return true;
+    }
+
+    private void save(boolean value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml");
+        var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS)
+                && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe lock");
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS);
+             var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions();
+            options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20);
+            options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options));
+            Map<String, Object> values = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) {
+                    bytes = input.readNBytes(MAX_BYTES + 1);
+                }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String key)) throw new IOException("Invalid configuration key");
+                        values.put(key, entry.getValue());
+                    }
+                }
+            }
+            values.put(KEY, value);
+            byte[] bytes = yaml.dump(values).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes);
+                    while (buffer.hasRemaining()) output.write(buffer);
+                    output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() {
+        pending--;
+        if (closed && pending == 0) drained.complete(null);
+    }
+
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+
+    @Override public synchronized void close() {
+        closed = true;
+        worker.shutdown();
+        if (pending == 0) drained.complete(null);
+    }
+}

src/main/java/games/dmg/fantasystick/persistence/SanctuarySettings.java

@@ -0,0 +1,177 @@
+package games.dmg.fantasystick.persistence;
+
+import games.dmg.fantasystick.ability.Sanctuary;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Serialized durable Sanctuary settings; publication remains a server-thread caller decision. */
+public final class SanctuarySettings implements AutoCloseable {
+    private static final int MAX_BYTES = 1_048_576;
+    public static final String COOLDOWN = "sanctuary-cooldown-seconds";
+    public static final String RADIUS = "sanctuary-radius-blocks";
+    public static final String VERTICAL = "sanctuary-vertical-range-blocks";
+    public static final String DURATION = "sanctuary-duration-seconds";
+    public static final String INTERVAL = "sanctuary-pulse-interval-seconds";
+    public static final String HEALING = "sanctuary-healing-per-pulse";
+    public static final String REDUCTION = "sanctuary-damage-reduction-percent";
+    private static final List<String> KEYS = List.of(COOLDOWN, RADIUS, VERTICAL, DURATION, INTERVAL, HEALING, REDUCTION);
+    private static final Map<String, String> DEFAULTS = Map.of(
+        COOLDOWN, "45", RADIUS, "6", VERTICAL, "3", DURATION, "6", INTERVAL, "1", HEALING, "2", REDUCTION, "20");
+
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(String key, String value, Sanctuary.Settings settings, Map<String, String> values, long sequence) {
+        public Update { values = Map.copyOf(values); }
+    }
+
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-sanctuary-configuration"));
+    private volatile Map<String, String> effectiveValues;
+    private Map<String, String> persistedValues;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public SanctuarySettings(Path directory, Map<String, String> initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    SanctuarySettings(Path directory, Map<String, String> initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath(); this.replacement = Objects.requireNonNull(replacement);
+        var copy = new LinkedHashMap<String, String>();
+        for (String key : KEYS) copy.put(key, Objects.requireNonNull(initial.get(key)));
+        parse(copy); effectiveValues = Map.copyOf(copy); persistedValues = Map.copyOf(copy);
+    }
+
+    public static List<String> keys() { return KEYS; }
+    public static String defaultValue(String key) { return DEFAULTS.get(key); }
+    public String value(String key) { return effectiveValues.get(key); }
+    public Sanctuary.Settings settings() { return parse(effectiveValues); }
+
+    public synchronized void publish(Update update) {
+        Objects.requireNonNull(update);
+        if (update.sequence() <= publishedSequence) return;
+        parse(update.values()); effectiveValues = update.values(); publishedSequence = update.sequence();
+    }
+
+    public CompletionStage<Update> set(String key, String value) {
+        Objects.requireNonNull(key); Objects.requireNonNull(value);
+        if (!KEYS.contains(key)) return CompletableFuture.failedStage(new IllegalArgumentException("Unknown setting"));
+        String accepted = canonical(value); var preview = new LinkedHashMap<>(effectiveValues);
+        preview.put(key, accepted); parse(preview);
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    var next = new LinkedHashMap<>(persistedValues); next.put(key, accepted);
+                    var parsed = parse(next); save(key, accepted); persistedValues = Map.copyOf(next);
+                    return new Update(key, accepted, parsed, persistedValues, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(failure instanceof IllegalArgumentException
+                        ? failure : new IOException("Sanctuary configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished(); return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    private static String canonical(String raw) {
+        try { return new BigDecimal(raw).stripTrailingZeros().toPlainString(); }
+        catch (NumberFormatException invalid) { throw new IllegalArgumentException("Invalid value", invalid); }
+    }
+
+    public static Sanctuary.Settings parse(Map<String, String> values) {
+        try { return new Sanctuary.Settings(seconds(values.get(COOLDOWN)), finite(values.get(RADIUS)),
+            finiteNonnegative(values.get(VERTICAL)), seconds(values.get(DURATION)), seconds(values.get(INTERVAL)),
+            new BigDecimal(values.get(HEALING)), new BigDecimal(values.get(REDUCTION))); }
+        catch (ArithmeticException | NumberFormatException | NullPointerException invalid) {
+            throw new IllegalArgumentException("Sanctuary settings must use supported numeric values", invalid);
+        }
+    }
+
+    private static Duration seconds(String value) {
+        var nanos = new BigDecimal(value).movePointRight(9).toBigIntegerExact().longValueExact();
+        return Duration.ofNanos(nanos);
+    }
+
+    private static double finite(String value) {
+        double result = new BigDecimal(value).doubleValue();
+        if (!Double.isFinite(result)) throw new IllegalArgumentException("Setting is not finite");
+        return result;
+    }
+    private static double finiteNonnegative(String value) {
+        double result = finite(value); if (result < 0) throw new IllegalArgumentException("Setting is negative"); return result;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml"); var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS) && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) {
+            throw new IOException("Unsafe lock");
+        }
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                LinkOption.NOFOLLOW_LINKS); var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options)); Map<String, Object> document = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String savedKey)) throw new IOException("Invalid configuration key");
+                        document.put(savedKey, entry.getValue());
+                    }
+                }
+            }
+            document.put(key, value); byte[] bytes = yaml.dump(document).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() { pending--; if (closed && pending == 0) drained.complete(null); }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() { closed = true; worker.shutdown(); if (pending == 0) drained.complete(null); }
+}

src/main/java/games/dmg/fantasystick/persistence/SecondWindSettings.java

@@ -0,0 +1,187 @@
+package games.dmg.fantasystick.persistence;
+
+import games.dmg.fantasystick.ability.SecondWind;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Serialized durable SecondWind settings; publication remains a server-thread caller decision. */
+public final class SecondWindSettings implements AutoCloseable {
+    private static final int MAX_BYTES = 1_048_576;
+    public static final String BASE_HEALING = "second-wind-base-healing";
+    public static final String COOLDOWN = "second-wind-cooldown-seconds";
+    private static final List<String> KEYS = List.of(BASE_HEALING, COOLDOWN);
+    private static final Map<String, String> DEFAULTS = Map.of(BASE_HEALING, "6", COOLDOWN, "15");
+
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(String key, String value, SecondWind.Settings settings,
+                         Map<String, String> values, long sequence) {
+        public Update { values = Map.copyOf(values); }
+    }
+
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-second-wind-configuration"));
+    private volatile Map<String, String> effectiveValues;
+    private Map<String, String> persistedValues;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public SecondWindSettings(Path directory, Map<String, String> initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    SecondWindSettings(Path directory, Map<String, String> initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath();
+        this.replacement = Objects.requireNonNull(replacement);
+        var copy = new LinkedHashMap<String, String>();
+        for (String key : KEYS) copy.put(key, Objects.requireNonNull(initial.get(key)));
+        parse(copy);
+        effectiveValues = Map.copyOf(copy); persistedValues = Map.copyOf(copy);
+    }
+
+    public static List<String> keys() { return KEYS; }
+    public static String defaultValue(String key) { return DEFAULTS.get(key); }
+    public String value(String key) { return effectiveValues.get(key); }
+    public SecondWind.Settings settings() { return parse(effectiveValues); }
+
+    /** Publish only after the caller returns the durable acknowledgment to the server thread. */
+    public synchronized void publish(Update update) {
+        Objects.requireNonNull(update);
+        if (update.sequence() <= publishedSequence) return;
+        parse(update.values());
+        effectiveValues = update.values(); publishedSequence = update.sequence();
+    }
+
+    public CompletionStage<Update> set(String key, String value) {
+        Objects.requireNonNull(key); Objects.requireNonNull(value);
+        if (!KEYS.contains(key)) return CompletableFuture.failedStage(new IllegalArgumentException("Unknown setting"));
+        String accepted = canonical(key, value);
+        var preview = new LinkedHashMap<>(effectiveValues); preview.put(key, accepted);
+        parse(preview); // Fail malformed/out-of-range command input before queueing accepted persistence.
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    var next = new LinkedHashMap<>(persistedValues);
+                    next.put(key, accepted);
+                    var parsed = parse(next);
+                    save(key, accepted);
+                    persistedValues = Map.copyOf(next);
+                    return new Update(key, accepted, parsed, persistedValues, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(failure instanceof IllegalArgumentException
+                        ? failure : new IOException("SecondWind configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished();
+            return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    private static String canonical(String key, String raw) {
+        try {
+            if (key.equals(BASE_HEALING)) return new java.math.BigInteger(raw).toString();
+            return new java.math.BigDecimal(raw).stripTrailingZeros().toPlainString();
+        } catch (NumberFormatException invalid) { throw new IllegalArgumentException("Invalid value", invalid); }
+    }
+
+    public static SecondWind.Settings parse(Map<String, String> values) {
+        try {
+            var base = new java.math.BigInteger(values.get(BASE_HEALING));
+            var cooldown = seconds(values.get(COOLDOWN));
+            return new SecondWind.Settings(base, cooldown);
+        } catch (ArithmeticException | NumberFormatException | NullPointerException invalid) {
+            throw new IllegalArgumentException("SecondWind settings must use supported numeric values", invalid);
+        }
+    }
+
+    private static Duration seconds(String value) {
+        var nanos = new java.math.BigDecimal(value).movePointRight(9).toBigIntegerExact().longValueExact();
+        return Duration.ofNanos(nanos);
+    }
+
+    private static double finite(String value) {
+        double result = new java.math.BigDecimal(value).doubleValue();
+        if (!Double.isFinite(result)) throw new IllegalArgumentException("Setting is not finite");
+        return result;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml");
+        var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS)
+                && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe lock");
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                LinkOption.NOFOLLOW_LINKS); var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options));
+            Map<String, Object> document = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String savedKey)) throw new IOException("Invalid configuration key");
+                        document.put(savedKey, entry.getValue());
+                    }
+                }
+            }
+            document.put(key, value);
+            byte[] bytes = yaml.dump(document).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() {
+        pending--;
+        if (closed && pending == 0) drained.complete(null);
+    }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() {
+        closed = true; worker.shutdown(); if (pending == 0) drained.complete(null);
+    }
+}

src/main/java/games/dmg/fantasystick/persistence/SheetResourcePackSettings.java

@@ -0,0 +1,209 @@
+package games.dmg.fantasystick.persistence;
+
+import java.io.IOException;
+import java.net.URI;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Properties;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Durable paired resource-pack overrides; each publication carries the latest complete saved snapshot. */
+public final class SheetResourcePackSettings implements AutoCloseable {
+    public static final String URL_KEY = "sheet-resource-pack-url";
+    public static final String SHA1_KEY = "sheet-resource-pack-sha1";
+    private static final int MAX_BYTES = 1_048_576;
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Defaults(String url, String sha1) {
+        public Defaults { url = effectiveUrl(url, new DefaultsMarker()); sha1 = normalizeHash(sha1, false); }
+    }
+    private static final class DefaultsMarker { }
+    public record Snapshot(String configuredUrl, String configuredSha1, String url, String sha1) { }
+    public record Update(Snapshot snapshot, long sequence) { }
+    private final Path directory;
+    private final Defaults defaults;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker;
+    private volatile Snapshot effective;
+    private String persistedUrl;
+    private String persistedSha1;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public SheetResourcePackSettings(Path directory, Object configuredUrl, Object configuredSha1, Defaults defaults) {
+        this(directory, raw(configuredUrl, URL_KEY), raw(configuredSha1, SHA1_KEY), defaults,
+            (from, to) -> Files.move(from, to, StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    SheetResourcePackSettings(Path directory, String configuredUrl, String configuredSha1, Defaults defaults, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath();
+        this.defaults = Objects.requireNonNull(defaults);
+        this.replacement = Objects.requireNonNull(replacement);
+        effective = snapshot(configuredUrl, configuredSha1);
+        worker = Executors.newSingleThreadExecutor(task -> new Thread(task, "fantasy-sheet-resource-pack-configuration"));
+        persistedUrl = configuredUrl;
+        persistedSha1 = configuredSha1;
+    }
+
+    public static Defaults packagedDefaults() {
+        try (var input = SheetResourcePackSettings.class.getResourceAsStream("/sheet-resource-pack.properties")) {
+            if (input == null) throw new IOException("Missing packaged sheet resource-pack metadata");
+            var values = new Properties(); values.load(input);
+            return new Defaults(values.getProperty("url"), values.getProperty("sha1"));
+        } catch (IOException | IllegalArgumentException failure) {
+            throw new IllegalStateException("Invalid packaged sheet resource-pack metadata", failure);
+        }
+    }
+
+    private static String raw(Object value, String key) {
+        if (value == null) return "";
+        if (value instanceof String text) return text;
+        throw new IllegalArgumentException(key + " must be a string");
+    }
+
+    public static String effectiveUrl(String configured, Defaults defaults) {
+        Objects.requireNonNull(defaults);
+        return configured == null || configured.isEmpty() ? defaults.url() : validateUrl(configured);
+    }
+
+    private static String effectiveUrl(String value, DefaultsMarker ignored) { return validateUrl(value); }
+
+    private static String validateUrl(String value) {
+        if (value == null || value.length() > 2048 || value.chars().anyMatch(Character::isWhitespace)) {
+            throw new IllegalArgumentException(URL_KEY + " must be a supported HTTPS URL");
+        }
+        try {
+            var uri = URI.create(value);
+            if (!"https".equals(uri.getScheme()) || uri.getHost() == null || uri.getHost().isBlank()
+                    || uri.getRawUserInfo() != null || uri.getRawFragment() != null
+                    || uri.getRawPath() == null || uri.getRawPath().isBlank()) {
+                throw new IllegalArgumentException(URL_KEY + " must be an absolute HTTPS asset URL without credentials or fragment");
+            }
+            return uri.toASCIIString();
+        } catch (IllegalArgumentException invalid) {
+            throw new IllegalArgumentException(URL_KEY + " must be a supported HTTPS URL", invalid);
+        }
+    }
+
+    public static String effectiveSha1(String configured, Defaults defaults) {
+        Objects.requireNonNull(defaults);
+        return configured == null || configured.isEmpty() ? defaults.sha1() : normalizeHash(configured, false);
+    }
+
+    private static String normalizeHash(String value, boolean allowEmpty) {
+        if (allowEmpty && (value == null || value.isEmpty())) return "";
+        if (value == null || !value.matches("[a-fA-F0-9]{40}")) {
+            throw new IllegalArgumentException(SHA1_KEY + " must be exactly 40 hexadecimal characters");
+        }
+        return value.toLowerCase(java.util.Locale.ROOT);
+    }
+
+    private Snapshot snapshot(String configuredUrl, String configuredSha1) {
+        String url = configuredUrl == null ? "" : configuredUrl;
+        String sha1 = configuredSha1 == null ? "" : normalizeHash(configuredSha1, true);
+        return new Snapshot(url, sha1, effectiveUrl(url, defaults), effectiveSha1(sha1, defaults));
+    }
+
+    public String url() { return effective.url(); }
+    public String sha1() { return effective.sha1(); }
+    public String value(String key) {
+        var state = effective;
+        return switch (key) {
+            case URL_KEY -> state.url();
+            case SHA1_KEY -> state.sha1();
+            default -> throw new IllegalArgumentException("Unknown sheet resource-pack key");
+        };
+    }
+
+    public CompletionStage<Update> set(String key, String raw) {
+        if (!URL_KEY.equals(key) && !SHA1_KEY.equals(key)) throw new IllegalArgumentException("Unknown sheet resource-pack key");
+        if (raw == null) throw new IllegalArgumentException(key + " requires a value");
+        if (URL_KEY.equals(key) && !raw.isEmpty()) validateUrl(raw);
+        if (SHA1_KEY.equals(key)) raw = normalizeHash(raw, true);
+        final String accepted = raw;
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    save(key, accepted);
+                    if (URL_KEY.equals(key)) persistedUrl = accepted; else persistedSha1 = accepted;
+                    return new Update(snapshot(persistedUrl, persistedSha1), ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(new IOException(
+                        "Sheet resource-pack configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished();
+            return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    public synchronized boolean publish(Update update) {
+        if (update.sequence() <= publishedSequence) return false;
+        effective = update.snapshot();
+        publishedSequence = update.sequence();
+        return true;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml"); var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS) && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe lock");
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS);
+             var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false); options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options)); Map<String, Object> values = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes; try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String name)) throw new IOException("Invalid configuration key");
+                        values.put(name, entry.getValue());
+                    }
+                }
+            }
+            values.put(key, value);
+            byte[] bytes = yaml.dump(values).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() { pending--; if (closed && pending == 0) drained.complete(null); }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() { closed = true; worker.shutdown(); if (pending == 0) drained.complete(null); }
+}

src/main/java/games/dmg/fantasystick/persistence/ShieldBashSettings.java

@@ -0,0 +1,192 @@
+package games.dmg.fantasystick.persistence;
+
+import games.dmg.fantasystick.ability.ShieldBash;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Serialized durable Shield Bash settings; publication remains a server-thread caller decision. */
+public final class ShieldBashSettings implements AutoCloseable {
+    private static final int MAX_BYTES = 1_048_576;
+    public static final String BASE_DAMAGE = "shield-bash-base-damage";
+    public static final String COOLDOWN = "shield-bash-cooldown-seconds";
+    public static final String RANGE = "shield-bash-range-blocks";
+    public static final String HORIZONTAL = "shield-bash-horizontal-knockback";
+    public static final String VERTICAL = "shield-bash-minimum-vertical-knockback";
+    private static final List<String> KEYS = List.of(BASE_DAMAGE, COOLDOWN, RANGE, HORIZONTAL, VERTICAL);
+    private static final Map<String, String> DEFAULTS = Map.of(BASE_DAMAGE, "4", COOLDOWN, "6", RANGE, "3",
+        HORIZONTAL, "0.8", VERTICAL, "0.35");
+
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(String key, String value, ShieldBash.Settings settings,
+                         Map<String, String> values, long sequence) {
+        public Update { values = Map.copyOf(values); }
+    }
+
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-shield-bash-configuration"));
+    private volatile Map<String, String> effectiveValues;
+    private Map<String, String> persistedValues;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public ShieldBashSettings(Path directory, Map<String, String> initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    ShieldBashSettings(Path directory, Map<String, String> initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath();
+        this.replacement = Objects.requireNonNull(replacement);
+        var copy = new LinkedHashMap<String, String>();
+        for (String key : KEYS) copy.put(key, Objects.requireNonNull(initial.get(key)));
+        parse(copy);
+        effectiveValues = Map.copyOf(copy); persistedValues = Map.copyOf(copy);
+    }
+
+    public static List<String> keys() { return KEYS; }
+    public static String defaultValue(String key) { return DEFAULTS.get(key); }
+    public String value(String key) { return effectiveValues.get(key); }
+    public ShieldBash.Settings settings() { return parse(effectiveValues); }
+
+    /** Publish only after the caller returns the durable acknowledgment to the server thread. */
+    public synchronized void publish(Update update) {
+        Objects.requireNonNull(update);
+        if (update.sequence() <= publishedSequence) return;
+        parse(update.values());
+        effectiveValues = update.values(); publishedSequence = update.sequence();
+    }
+
+    public CompletionStage<Update> set(String key, String value) {
+        Objects.requireNonNull(key); Objects.requireNonNull(value);
+        if (!KEYS.contains(key)) return CompletableFuture.failedStage(new IllegalArgumentException("Unknown setting"));
+        String accepted = canonical(key, value);
+        var preview = new LinkedHashMap<>(effectiveValues); preview.put(key, accepted);
+        parse(preview); // Fail malformed/out-of-range command input before queueing accepted persistence.
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    var next = new LinkedHashMap<>(persistedValues);
+                    next.put(key, accepted);
+                    var parsed = parse(next);
+                    save(key, accepted);
+                    persistedValues = Map.copyOf(next);
+                    return new Update(key, accepted, parsed, persistedValues, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(failure instanceof IllegalArgumentException
+                        ? failure : new IOException("Shield Bash configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished();
+            return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    private static String canonical(String key, String raw) {
+        try {
+            if (key.equals(BASE_DAMAGE)) return new java.math.BigInteger(raw).toString();
+            return new java.math.BigDecimal(raw).stripTrailingZeros().toPlainString();
+        } catch (NumberFormatException invalid) { throw new IllegalArgumentException("Invalid value", invalid); }
+    }
+
+    public static ShieldBash.Settings parse(Map<String, String> values) {
+        try {
+            var base = new java.math.BigInteger(values.get(BASE_DAMAGE));
+            var cooldown = seconds(values.get(COOLDOWN));
+            return new ShieldBash.Settings(base, cooldown, finite(values.get(RANGE)),
+                finite(values.get(HORIZONTAL)), finite(values.get(VERTICAL)));
+        } catch (ArithmeticException | NumberFormatException | NullPointerException invalid) {
+            throw new IllegalArgumentException("Shield Bash settings must use supported numeric values", invalid);
+        }
+    }
+
+    private static Duration seconds(String value) {
+        var nanos = new java.math.BigDecimal(value).movePointRight(9).toBigIntegerExact().longValueExact();
+        return Duration.ofNanos(nanos);
+    }
+
+    private static double finite(String value) {
+        double result = new java.math.BigDecimal(value).doubleValue();
+        if (!Double.isFinite(result)) throw new IllegalArgumentException("Setting is not finite");
+        return result;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml");
+        var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS)
+                && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe lock");
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                LinkOption.NOFOLLOW_LINKS); var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options));
+            Map<String, Object> document = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String savedKey)) throw new IOException("Invalid configuration key");
+                        document.put(savedKey, entry.getValue());
+                    }
+                }
+            }
+            document.put(key, value);
+            byte[] bytes = yaml.dump(document).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() {
+        pending--;
+        if (closed && pending == 0) drained.complete(null);
+    }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() {
+        closed = true; worker.shutdown(); if (pending == 0) drained.complete(null);
+    }
+}

src/main/java/games/dmg/fantasystick/persistence/StoneSkinSettings.java

@@ -0,0 +1,188 @@
+package games.dmg.fantasystick.persistence;
+
+import games.dmg.fantasystick.ability.StoneSkin;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Serialized durable Stone Skin settings; publication remains a server-thread caller decision. */
+public final class StoneSkinSettings implements AutoCloseable {
+    private static final int MAX_BYTES = 1_048_576;
+    public static final String COOLDOWN = "stone-skin-cooldown-seconds";
+    public static final String DURATION = "stone-skin-duration-seconds";
+    public static final String REDUCTION = "stone-skin-damage-reduction-percent";
+    private static final List<String> KEYS = List.of(COOLDOWN, DURATION, REDUCTION);
+    private static final Map<String, String> DEFAULTS = Map.of(COOLDOWN, "14", DURATION, "4", REDUCTION, "25");
+
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(String key, String value, StoneSkin.Settings settings,
+                         Map<String, String> values, long sequence) {
+        public Update { values = Map.copyOf(values); }
+    }
+
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-stone-skin-configuration"));
+    private volatile Map<String, String> effectiveValues;
+    private Map<String, String> persistedValues;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public StoneSkinSettings(Path directory, Map<String, String> initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    StoneSkinSettings(Path directory, Map<String, String> initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath();
+        this.replacement = Objects.requireNonNull(replacement);
+        var copy = new LinkedHashMap<String, String>();
+        for (String key : KEYS) copy.put(key, Objects.requireNonNull(initial.get(key)));
+        parse(copy);
+        effectiveValues = Map.copyOf(copy); persistedValues = Map.copyOf(copy);
+    }
+
+    public static List<String> keys() { return KEYS; }
+    public static String defaultValue(String key) { return DEFAULTS.get(key); }
+    public String value(String key) { return effectiveValues.get(key); }
+    public StoneSkin.Settings settings() { return parse(effectiveValues); }
+
+    /** Publish only after the caller returns the durable acknowledgment to the server thread. */
+    public synchronized void publish(Update update) {
+        Objects.requireNonNull(update);
+        if (update.sequence() <= publishedSequence) return;
+        parse(update.values());
+        effectiveValues = update.values(); publishedSequence = update.sequence();
+    }
+
+    public CompletionStage<Update> set(String key, String value) {
+        Objects.requireNonNull(key); Objects.requireNonNull(value);
+        if (!KEYS.contains(key)) return CompletableFuture.failedStage(new IllegalArgumentException("Unknown setting"));
+        String accepted = canonical(key, value);
+        var preview = new LinkedHashMap<>(effectiveValues); preview.put(key, accepted);
+        parse(preview); // Fail malformed/out-of-range command input before queueing accepted persistence.
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    var next = new LinkedHashMap<>(persistedValues);
+                    next.put(key, accepted);
+                    var parsed = parse(next);
+                    save(key, accepted);
+                    persistedValues = Map.copyOf(next);
+                    return new Update(key, accepted, parsed, persistedValues, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(failure instanceof IllegalArgumentException
+                        ? failure : new IOException("Stone Skin configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished();
+            return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    private static String canonical(String key, String raw) {
+        try {
+            return new java.math.BigDecimal(raw).stripTrailingZeros().toPlainString();
+        } catch (NumberFormatException invalid) { throw new IllegalArgumentException("Invalid value", invalid); }
+    }
+
+    public static StoneSkin.Settings parse(Map<String, String> values) {
+        try {
+            var cooldown = seconds(values.get(COOLDOWN));
+            var duration = seconds(values.get(DURATION));
+            var reduction = new java.math.BigDecimal(values.get(REDUCTION));
+            return new StoneSkin.Settings(cooldown, duration, reduction);
+        } catch (ArithmeticException | NumberFormatException | NullPointerException invalid) {
+            throw new IllegalArgumentException("Stone Skin settings must use supported numeric values", invalid);
+        }
+    }
+
+    private static Duration seconds(String value) {
+        var nanos = new java.math.BigDecimal(value).movePointRight(9).toBigIntegerExact().longValueExact();
+        return Duration.ofNanos(nanos);
+    }
+
+    private static double finite(String value) {
+        double result = new java.math.BigDecimal(value).doubleValue();
+        if (!Double.isFinite(result)) throw new IllegalArgumentException("Setting is not finite");
+        return result;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml");
+        var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS)
+                && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe lock");
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                LinkOption.NOFOLLOW_LINKS); var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options));
+            Map<String, Object> document = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String savedKey)) throw new IOException("Invalid configuration key");
+                        document.put(savedKey, entry.getValue());
+                    }
+                }
+            }
+            document.put(key, value);
+            byte[] bytes = yaml.dump(document).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() {
+        pending--;
+        if (closed && pending == 0) drained.complete(null);
+    }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() {
+        closed = true; worker.shutdown(); if (pending == 0) drained.complete(null);
+    }
+}

src/main/java/games/dmg/fantasystick/persistence/SwitchDelaySettings.java

@@ -0,0 +1,42 @@
+package games.dmg.fantasystick.persistence;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Durable save-before-publish policy for character-switch delay checks and later exits. */
+public final class SwitchDelaySettings implements AutoCloseable {
+    public static final String KEY="character-swap-cooldown-seconds";public static final String DEFAULT="900";
+    private static final int MAX_BYTES=1_048_576;
+    @FunctionalInterface interface Replacement{void move(Path from,Path to)throws IOException;}
+    public record Update(String value,Duration delay,long sequence){}
+    private final Path directory;private final Replacement replacement;private final java.util.concurrent.ExecutorService worker=Executors.newSingleThreadExecutor(task->new Thread(task,"fantasy-switch-delay-configuration"));
+    private volatile Duration effective;private long persistedSequence,publishedSequence;private boolean closed;private int pending;private final CompletableFuture<Void> drained=new CompletableFuture<>();
+    public SwitchDelaySettings(Path directory,Duration initial){this(directory,initial,(from,to)->Files.move(from,to,StandardCopyOption.ATOMIC_MOVE,StandardCopyOption.REPLACE_EXISTING));}
+    SwitchDelaySettings(Path directory,Duration initial,Replacement replacement){this.directory=Objects.requireNonNull(directory).toAbsolutePath();this.replacement=Objects.requireNonNull(replacement);effective=validate(initial);}
+    public static Duration parse(Object value){if(value==null)return Duration.ofSeconds(900);try{return validate(Duration.ofSeconds(value instanceof Number n?new java.math.BigDecimal(n.toString()).longValueExact():Long.parseLong(value.toString())));}catch(ArithmeticException|NumberFormatException invalid){throw new IllegalArgumentException(KEY+" must be nonnegative whole seconds",invalid);}}
+    private static Duration validate(Duration value){if(value.isNegative()||value.getNano()!=0)throw new IllegalArgumentException(KEY+" must be nonnegative whole seconds");try{var deadline=java.time.Instant.now().plus(value);if(deadline.atOffset(java.time.ZoneOffset.UTC).getYear()>9999)throw new IllegalArgumentException(KEY+" exceeds the persisted timestamp range");return value;}catch(java.time.DateTimeException|ArithmeticException invalid){throw new IllegalArgumentException(KEY+" exceeds the persisted timestamp range",invalid);}}
+    public Duration delay(){return effective;}public String value(){return Long.toString(effective.toSeconds());}
+    public CompletionStage<Update> set(String raw){Duration accepted=parse(raw);synchronized(this){if(closed)return CompletableFuture.failedStage(new IOException("Configuration store is closed"));pending++;}try{return CompletableFuture.supplyAsync(()->{try{save(accepted);return new Update(Long.toString(accepted.toSeconds()),accepted,++persistedSequence);}catch(IOException|RuntimeException failure){throw new java.util.concurrent.CompletionException(new IOException("Character switch configuration save refused or failed; effective setting unchanged"));}finally{finished();}},worker).minimalCompletionStage();}catch(RejectedExecutionException rejected){finished();return CompletableFuture.failedStage(new IOException("Configuration store is closed"));}}
+    public synchronized void publish(Update update){if(update.sequence()<=publishedSequence)return;effective=validate(update.delay());publishedSequence=update.sequence();}
+    private void save(Duration value)throws IOException{Files.createDirectories(directory);if(!Files.isDirectory(directory,LinkOption.NOFOLLOW_LINKS))throw new IOException("Unsafe directory");var file=directory.resolve("config.yml");var lockFile=directory.resolve(".config.lock");if(Files.exists(lockFile,LinkOption.NOFOLLOW_LINKS)&&!Files.isRegularFile(lockFile,LinkOption.NOFOLLOW_LINKS))throw new IOException("Unsafe lock");try(var channel=FileChannel.open(lockFile,StandardOpenOption.CREATE,StandardOpenOption.WRITE,LinkOption.NOFOLLOW_LINKS);var lock=channel.tryLock()){if(lock==null)throw new IOException("Configuration busy");var options=new LoaderOptions();options.setAllowDuplicateKeys(false);options.setMaxAliasesForCollections(20);options.setCodePointLimit(MAX_BYTES);var yaml=new Yaml(new SafeConstructor(options));Map<String,Object> values=new LinkedHashMap<>();if(Files.exists(file,LinkOption.NOFOLLOW_LINKS)){if(!Files.isRegularFile(file,LinkOption.NOFOLLOW_LINKS))throw new IOException("Unsafe configuration");byte[] bytes;try(var input=Files.newInputStream(file,LinkOption.NOFOLLOW_LINKS)){bytes=input.readNBytes(MAX_BYTES+1);}if(bytes.length>MAX_BYTES)throw new IOException("Configuration too large");Object loaded=yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());if(loaded!=null){if(!(loaded instanceof Map<?,?> map))throw new IOException("Invalid configuration root");for(var entry:map.entrySet()){if(!(entry.getKey() instanceof String key))throw new IOException("Invalid configuration key");values.put(key,entry.getValue());}}}values.put(KEY,Long.toString(value.toSeconds()));byte[] bytes=yaml.dump(values).getBytes(StandardCharsets.UTF_8);if(bytes.length>MAX_BYTES)throw new IOException("Configuration too large");Path temporary=Files.createTempFile(directory,".config-",".tmp");try{try(var output=FileChannel.open(temporary,StandardOpenOption.WRITE,LinkOption.NOFOLLOW_LINKS)){var buffer=ByteBuffer.wrap(bytes);while(buffer.hasRemaining())output.write(buffer);output.force(true);}replacement.move(temporary,file);}finally{Files.deleteIfExists(temporary);}}catch(OverlappingFileLockException busy){throw new IOException("Configuration busy");}}
+    private synchronized void finished(){pending--;if(closed&&pending==0)drained.complete(null);}public CompletionStage<Void> drained(){return drained.minimalCompletionStage();}@Override public synchronized void close(){closed=true;worker.shutdown();if(pending==0)drained.complete(null);}
+}

src/main/java/games/dmg/fantasystick/persistence/WarBannerSettings.java

@@ -0,0 +1,179 @@
+package games.dmg.fantasystick.persistence;
+
+import games.dmg.fantasystick.ability.WarBanner;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.OverlappingFileLockException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.time.Duration;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
+import org.yaml.snakeyaml.LoaderOptions;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.SafeConstructor;
+
+/** Serialized durable WarBanner settings; publication remains a server-thread caller decision. */
+public final class WarBannerSettings implements AutoCloseable {
+    private static final int MAX_BYTES = 1_048_576;
+    public static final String COOLDOWN = "war-banner-cooldown-seconds";
+    public static final String PLACEMENT_RANGE = "war-banner-placement-range-blocks";
+    public static final String RADIUS = "war-banner-radius-blocks";
+    public static final String VERTICAL = "war-banner-vertical-range-blocks";
+    public static final String DURATION = "war-banner-duration-seconds";
+    public static final String DAMAGE_BONUS = "war-banner-damage-bonus-percent";
+    public static final String KNOCKBACK_RESISTANCE = "war-banner-knockback-resistance-percent";
+    private static final List<String> KEYS = List.of(COOLDOWN, PLACEMENT_RANGE, RADIUS, VERTICAL, DURATION,
+        DAMAGE_BONUS, KNOCKBACK_RESISTANCE);
+    private static final Map<String, String> DEFAULTS = Map.of(
+        COOLDOWN, "45", PLACEMENT_RANGE, "12", RADIUS, "8", VERTICAL, "4", DURATION, "10",
+        DAMAGE_BONUS, "25", KNOCKBACK_RESISTANCE, "50");
+
+    @FunctionalInterface interface Replacement { void move(Path from, Path to) throws IOException; }
+    public record Update(String key, String value, WarBanner.Settings settings, Map<String, String> values, long sequence) {
+        public Update { values = Map.copyOf(values); }
+    }
+
+    private final Path directory;
+    private final Replacement replacement;
+    private final java.util.concurrent.ExecutorService worker = Executors.newSingleThreadExecutor(
+        task -> new Thread(task, "fantasy-war-banner-configuration"));
+    private volatile Map<String, String> effectiveValues;
+    private Map<String, String> persistedValues;
+    private long persistedSequence;
+    private long publishedSequence;
+    private boolean closed;
+    private int pending;
+    private final CompletableFuture<Void> drained = new CompletableFuture<>();
+
+    public WarBannerSettings(Path directory, Map<String, String> initial) {
+        this(directory, initial, (from, to) -> Files.move(from, to,
+            StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING));
+    }
+
+    WarBannerSettings(Path directory, Map<String, String> initial, Replacement replacement) {
+        this.directory = Objects.requireNonNull(directory).toAbsolutePath(); this.replacement = Objects.requireNonNull(replacement);
+        var copy = new LinkedHashMap<String, String>();
+        for (String key : KEYS) copy.put(key, Objects.requireNonNull(initial.get(key)));
+        parse(copy); effectiveValues = Map.copyOf(copy); persistedValues = Map.copyOf(copy);
+    }
+
+    public static List<String> keys() { return KEYS; }
+    public static String defaultValue(String key) { return DEFAULTS.get(key); }
+    public String value(String key) { return effectiveValues.get(key); }
+    public WarBanner.Settings settings() { return parse(effectiveValues); }
+
+    public synchronized void publish(Update update) {
+        Objects.requireNonNull(update);
+        if (update.sequence() <= publishedSequence) return;
+        parse(update.values()); effectiveValues = update.values(); publishedSequence = update.sequence();
+    }
+
+    public CompletionStage<Update> set(String key, String value) {
+        Objects.requireNonNull(key); Objects.requireNonNull(value);
+        if (!KEYS.contains(key)) return CompletableFuture.failedStage(new IllegalArgumentException("Unknown setting"));
+        String accepted = canonical(value); var preview = new LinkedHashMap<>(effectiveValues);
+        preview.put(key, accepted); parse(preview);
+        synchronized (this) {
+            if (closed) return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+            pending++;
+        }
+        try {
+            return CompletableFuture.supplyAsync(() -> {
+                try {
+                    var next = new LinkedHashMap<>(persistedValues); next.put(key, accepted);
+                    var parsed = parse(next); save(key, accepted); persistedValues = Map.copyOf(next);
+                    return new Update(key, accepted, parsed, persistedValues, ++persistedSequence);
+                } catch (IOException | RuntimeException failure) {
+                    throw new java.util.concurrent.CompletionException(failure instanceof IllegalArgumentException
+                        ? failure : new IOException("WarBanner configuration save refused or failed; effective settings unchanged"));
+                } finally { finished(); }
+            }, worker).minimalCompletionStage();
+        } catch (RejectedExecutionException rejected) {
+            finished(); return CompletableFuture.failedStage(new IOException("Configuration store is closed"));
+        }
+    }
+
+    private static String canonical(String raw) {
+        try { return new BigDecimal(raw).stripTrailingZeros().toPlainString(); }
+        catch (NumberFormatException invalid) { throw new IllegalArgumentException("Invalid value", invalid); }
+    }
+
+    public static WarBanner.Settings parse(Map<String, String> values) {
+        try { return new WarBanner.Settings(seconds(values.get(COOLDOWN)), finite(values.get(PLACEMENT_RANGE)),
+            finite(values.get(RADIUS)), finiteNonnegative(values.get(VERTICAL)), seconds(values.get(DURATION)),
+            new BigDecimal(values.get(DAMAGE_BONUS)), new BigDecimal(values.get(KNOCKBACK_RESISTANCE))); }
+        catch (ArithmeticException | NumberFormatException | NullPointerException invalid) {
+            throw new IllegalArgumentException("WarBanner settings must use supported numeric values", invalid);
+        }
+    }
+
+    private static Duration seconds(String value) {
+        var nanos = new BigDecimal(value).movePointRight(9).toBigIntegerExact().longValueExact();
+        return Duration.ofNanos(nanos);
+    }
+
+    private static double finite(String value) {
+        double result = new BigDecimal(value).doubleValue();
+        if (!Double.isFinite(result)) throw new IllegalArgumentException("Setting is not finite");
+        return result;
+    }
+    private static double finiteNonnegative(String value) {
+        double result = finite(value); if (result < 0) throw new IllegalArgumentException("Setting is negative"); return result;
+    }
+
+    private void save(String key, String value) throws IOException {
+        Files.createDirectories(directory);
+        if (!Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe directory");
+        var file = directory.resolve("config.yml"); var lockFile = directory.resolve(".config.lock");
+        if (Files.exists(lockFile, LinkOption.NOFOLLOW_LINKS) && !Files.isRegularFile(lockFile, LinkOption.NOFOLLOW_LINKS)) {
+            throw new IOException("Unsafe lock");
+        }
+        try (var channel = FileChannel.open(lockFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                LinkOption.NOFOLLOW_LINKS); var lock = channel.tryLock()) {
+            if (lock == null) throw new IOException("Configuration busy");
+            var options = new LoaderOptions(); options.setAllowDuplicateKeys(false);
+            options.setMaxAliasesForCollections(20); options.setCodePointLimit(MAX_BYTES);
+            var yaml = new Yaml(new SafeConstructor(options)); Map<String, Object> document = new LinkedHashMap<>();
+            if (Files.exists(file, LinkOption.NOFOLLOW_LINKS)) {
+                if (!Files.isRegularFile(file, LinkOption.NOFOLLOW_LINKS)) throw new IOException("Unsafe configuration");
+                byte[] bytes;
+                try (var input = Files.newInputStream(file, LinkOption.NOFOLLOW_LINKS)) { bytes = input.readNBytes(MAX_BYTES + 1); }
+                if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+                Object loaded = yaml.load(StandardCharsets.UTF_8.newDecoder().decode(ByteBuffer.wrap(bytes)).toString());
+                if (loaded != null) {
+                    if (!(loaded instanceof Map<?, ?> map)) throw new IOException("Invalid configuration root");
+                    for (var entry : map.entrySet()) {
+                        if (!(entry.getKey() instanceof String savedKey)) throw new IOException("Invalid configuration key");
+                        document.put(savedKey, entry.getValue());
+                    }
+                }
+            }
+            document.put(key, value); byte[] bytes = yaml.dump(document).getBytes(StandardCharsets.UTF_8);
+            if (bytes.length > MAX_BYTES) throw new IOException("Configuration too large");
+            Path temporary = Files.createTempFile(directory, ".config-", ".tmp");
+            try {
+                try (var output = FileChannel.open(temporary, StandardOpenOption.WRITE, LinkOption.NOFOLLOW_LINKS)) {
+                    var buffer = ByteBuffer.wrap(bytes); while (buffer.hasRemaining()) output.write(buffer); output.force(true);
+                }
+                replacement.move(temporary, file);
+            } finally { Files.deleteIfExists(temporary); }
+        } catch (OverlappingFileLockException busy) { throw new IOException("Configuration busy"); }
+    }
+
+    private synchronized void finished() { pending--; if (closed && pending == 0) drained.complete(null); }
+    public CompletionStage<Void> drained() { return drained.minimalCompletionStage(); }
+    @Override public synchronized void close() { closed = true; worker.shutdown(); if (pending == 0) drained.complete(null); }
+}

src/main/java/games/dmg/fantasystick/presentation/SheetResourcePack.java

@@ -0,0 +1,59 @@
+package games.dmg.fantasystick.presentation;
+
+import games.dmg.fantasystick.persistence.SheetResourcePackSettings;
+import java.util.Collection;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.function.BiConsumer;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.event.player.PlayerResourcePackStatusEvent;
+
+/** Optional cosmetic pack delivery. Status never authorizes or cancels gameplay. */
+public final class SheetResourcePack implements Listener, AutoCloseable {
+    public static final UUID ID = UUID.fromString("0d53e627-f13b-5a49-b8d5-882d3f4122bb");
+    private final SheetResourcePackSettings settings;
+    private final BiConsumer<UUID, Throwable> failures;
+    private boolean closed;
+
+    public SheetResourcePack(SheetResourcePackSettings settings, BiConsumer<UUID, Throwable> failures) {
+        this.settings = Objects.requireNonNull(settings);
+        this.failures = Objects.requireNonNull(failures);
+    }
+
+    public void deliverAll(Collection<? extends Player> players) {
+        if (closed) return;
+        for (var player : players) if (player != null && player.isOnline()) deliver(player);
+    }
+
+    public void deliver(Player player) {
+        if (closed || !player.isOnline()) return;
+        try {
+            player.addResourcePack(ID, settings.url(), java.util.HexFormat.of().parseHex(settings.sha1()),
+                "Optional Fantasy Stick first-person sheet presentation", false);
+        } catch (RuntimeException failure) {
+            report(player.getUniqueId(), failure);
+            player.sendMessage("Fantasy Stick cosmetic resource pack could not be offered; gameplay is unchanged.");
+        }
+    }
+
+    @EventHandler public void join(PlayerJoinEvent event) { deliver(event.getPlayer()); }
+
+    @EventHandler public void status(PlayerResourcePackStatusEvent event) {
+        if (closed || !ID.equals(event.getID())) return;
+        switch (event.getStatus()) {
+            case DECLINED, FAILED_DOWNLOAD, INVALID_URL, FAILED_RELOAD, DISCARDED ->
+                event.getPlayer().sendMessage("Fantasy Stick cosmetic resource pack is unavailable; gameplay is unchanged.");
+            default -> { /* Acceptance/loading is cosmetic and needs no gameplay callback. */ }
+        }
+    }
+
+    private void report(UUID player, Throwable failure) {
+        try { failures.accept(player, failure); }
+        catch (RuntimeException ignored) { /* Diagnostics cannot make a cosmetic pack mandatory. */ }
+    }
+
+    @Override public void close() { closed = true; }
+}

src/main/java/games/dmg/fantasystick/progression/CombatContributions.java

@@ -0,0 +1,93 @@
+package games.dmg.fantasystick.progression;
+
+import java.time.Instant;
+import java.util.HashMap;
+import java.util.LinkedHashSet;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.UUID;
+
+/** Server-thread bounded contribution ledger keyed by target and originating character. */
+public final class CombatContributions implements AutoCloseable {
+    private static final java.time.Duration SUPPORT_LIFETIME = java.time.Duration.ofSeconds(10);
+    private final CombatRewardRules rules;
+    private final Map<UUID, Map<UUID, Instant>> targets = new HashMap<>();
+    private final Map<UUID, Map<UUID, Map<UUID, Instant>>> supports = new HashMap<>();
+    private final Map<UUID, Map<UUID, Instant>> effectiveHealing = new HashMap<>();
+    private boolean closed;
+
+    public CombatContributions(CombatRewardRules rules) { this.rules = Objects.requireNonNull(rules); }
+
+    public void accept(UUID target, UUID character, Instant acceptedAt) {
+        Objects.requireNonNull(target); Objects.requireNonNull(character); Objects.requireNonNull(acceptedAt);
+        if (closed) return;
+        targets.computeIfAbsent(target, ignored -> new HashMap<>()).merge(character, acceptedAt,
+            (previous, next) -> previous.isAfter(next) ? previous : next);
+    }
+
+    public void support(UUID target, UUID aidedCharacter, UUID supportingCharacter, Instant acceptedAt) {
+        Objects.requireNonNull(target); Objects.requireNonNull(aidedCharacter);
+        Objects.requireNonNull(supportingCharacter); Objects.requireNonNull(acceptedAt);
+        if (closed) return;
+        supports.computeIfAbsent(target, ignored -> new HashMap<>())
+            .computeIfAbsent(aidedCharacter, ignored -> new HashMap<>())
+            .merge(supportingCharacter, acceptedAt, (previous, next) -> previous.isAfter(next) ? previous : next);
+    }
+
+    /** Records effective healing that may qualify through any target the aided character directly contributes to. */
+    public void support(UUID aidedCharacter, UUID supportingCharacter, Instant acceptedAt) {
+        Objects.requireNonNull(aidedCharacter); Objects.requireNonNull(supportingCharacter); Objects.requireNonNull(acceptedAt);
+        if (closed) return;
+        effectiveHealing.computeIfAbsent(aidedCharacter, ignored -> new HashMap<>())
+            .merge(supportingCharacter, acceptedAt, (previous, next) -> previous.isAfter(next) ? previous : next);
+    }
+
+    public Set<UUID> consume(UUID target, Instant deathAt) {
+        Objects.requireNonNull(target); Objects.requireNonNull(deathAt);
+        if (closed) return Set.of();
+        var contributions = targets.remove(target);
+        var assistance = supports.remove(target);
+        if (contributions == null) return Set.of();
+        var eligible = new LinkedHashSet<UUID>();
+        contributions.forEach((character, acceptedAt) -> {
+            if (rules.contributes(acceptedAt, deathAt)) eligible.add(character);
+        });
+        for (UUID aided : Set.copyOf(eligible)) {
+            var targeted = assistance == null ? null : assistance.get(aided);
+            if (targeted != null) targeted.forEach((supporter, acceptedAt) -> {
+                if (supports(acceptedAt, deathAt)) eligible.add(supporter);
+            });
+            var healing = effectiveHealing.get(aided);
+            if (healing != null) healing.forEach((supporter, acceptedAt) -> {
+                if (supports(acceptedAt, deathAt)) eligible.add(supporter);
+            });
+        }
+        return Set.copyOf(eligible);
+    }
+
+    public void invalidate(UUID target) {
+        if (!closed) { target = Objects.requireNonNull(target); targets.remove(target); supports.remove(target); }
+    }
+
+    public void sweep(Instant now) {
+        Objects.requireNonNull(now);
+        if (closed) return;
+        targets.values().forEach(contributions -> contributions.entrySet().removeIf(entry -> !rules.contributes(entry.getValue(), now)));
+        targets.values().removeIf(Map::isEmpty);
+        supports.values().forEach(byAlly -> {
+            byAlly.values().forEach(bySupporter -> bySupporter.entrySet().removeIf(entry -> !supports(entry.getValue(), now)));
+            byAlly.values().removeIf(Map::isEmpty);
+        });
+        supports.values().removeIf(Map::isEmpty);
+        effectiveHealing.values().forEach(bySupporter ->
+            bySupporter.entrySet().removeIf(entry -> !supports(entry.getValue(), now)));
+        effectiveHealing.values().removeIf(Map::isEmpty);
+    }
+
+    private static boolean supports(Instant acceptedAt, Instant defeatAt) {
+        return !acceptedAt.isAfter(defeatAt) && !defeatAt.isAfter(acceptedAt.plus(SUPPORT_LIFETIME));
+    }
+
+    @Override public void close() { closed = true; targets.clear(); supports.clear(); effectiveHealing.clear(); }
+}

src/main/java/games/dmg/fantasystick/progression/CombatRewardRules.java

@@ -0,0 +1,76 @@
+package games.dmg.fantasystick.progression;
+
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.time.Instant;
+import java.util.Objects;
+import java.util.UUID;
+
+/** Validated combat reward arithmetic and location policy; native classification lives at the adapter. */
+public record CombatRewardRules(BigInteger passivePool, BigInteger ordinaryPool, BigInteger bossPool,
+                                BigDecimal restrictedSpacing) {
+    public enum Target { PASSIVE, ORDINARY, BOSS, FANTASY_CHARACTER }
+    public static final Duration CONTRIBUTION_LIFETIME = Duration.ofMinutes(5);
+
+    public record KillPosition(UUID world, BigDecimal x, BigDecimal y, BigDecimal z) {
+        public KillPosition {
+            Objects.requireNonNull(world);
+            x = coordinate(x); y = coordinate(y); z = coordinate(z);
+        }
+        private static BigDecimal coordinate(BigDecimal value) {
+            Objects.requireNonNull(value);
+            if (!Double.isFinite(value.doubleValue())) throw new IllegalArgumentException("Kill coordinate is not finite");
+            return value;
+        }
+    }
+
+    public CombatRewardRules {
+        Objects.requireNonNull(passivePool); Objects.requireNonNull(ordinaryPool);
+        Objects.requireNonNull(bossPool); Objects.requireNonNull(restrictedSpacing);
+        if (passivePool.signum() < 0 || ordinaryPool.signum() < 0 || bossPool.signum() < 0
+                || restrictedSpacing.signum() < 0 || !Double.isFinite(restrictedSpacing.doubleValue())) {
+            throw new IllegalArgumentException("Combat reward values must be finite and nonnegative");
+        }
+    }
+
+    public static CombatRewardRules defaults() {
+        return new CombatRewardRules(BigInteger.ONE, BigInteger.TEN, BigInteger.valueOf(100), BigDecimal.valueOf(3));
+    }
+
+    public BigInteger pool(Target target, int defeatedLevel) {
+        Objects.requireNonNull(target);
+        if (target == Target.FANTASY_CHARACTER) {
+            if (defeatedLevel < 1) throw new IllegalArgumentException("Fantasy character level must be positive");
+            return BigInteger.TEN.multiply(BigInteger.valueOf(defeatedLevel));
+        }
+        return switch (target) {
+            case PASSIVE -> passivePool;
+            case ORDINARY -> ordinaryPool;
+            case BOSS -> bossPool;
+            case FANTASY_CHARACTER -> throw new IllegalStateException("Handled fantasy character");
+        };
+    }
+
+    public BigInteger share(BigInteger pool, int contributors) {
+        Objects.requireNonNull(pool);
+        if (pool.signum() < 0 || contributors < 1) throw new IllegalArgumentException("Invalid reward share");
+        var count = BigInteger.valueOf(contributors);
+        return pool.add(count).subtract(BigInteger.ONE).divide(count);
+    }
+
+    public boolean contributes(Instant acceptedAt, Instant deathAt) {
+        Objects.requireNonNull(acceptedAt); Objects.requireNonNull(deathAt);
+        return !acceptedAt.isAfter(deathAt) && !deathAt.isAfter(acceptedAt.plus(CONTRIBUTION_LIFETIME));
+    }
+
+    public boolean spaced(KillPosition previous, KillPosition current) {
+        Objects.requireNonNull(previous); Objects.requireNonNull(current);
+        if (!previous.world().equals(current.world())) return true;
+        BigDecimal dx = current.x().subtract(previous.x());
+        BigDecimal dy = current.y().subtract(previous.y());
+        BigDecimal dz = current.z().subtract(previous.z());
+        BigDecimal squared = dx.multiply(dx).add(dy.multiply(dy)).add(dz.multiply(dz));
+        return squared.compareTo(restrictedSpacing.multiply(restrictedSpacing)) >= 0;
+    }
+}

src/main/java/games/dmg/fantasystick/session/AdminCharacterIssuer.java

@@ -0,0 +1,121 @@
+package games.dmg.fantasystick.session;
+
+import games.dmg.fantasystick.items.CharacterSheets;
+import games.dmg.fantasystick.persistence.CharacterRecord;
+import games.dmg.fantasystick.persistence.CharacterStorage;
+import java.util.List;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+import org.bukkit.entity.Player;
+
+/** Persists one fresh character before handing its authentic sheet to a still-valid native inventory slot. */
+public final class AdminCharacterIssuer implements AutoCloseable {
+    public enum Outcome { DELIVERED, FULL, BUSY, STALE, SAVE_FAILED, RETAINED }
+    public record Failure(UUID player, UUID character, String operation, Throwable cause) { }
+
+    private final CharacterStorage storage;
+    private final Supplier<CharacterRecord> allocate;
+    private final Consumer<Runnable> nextTick;
+    private final Consumer<Failure> failures;
+    private final ConcurrentHashMap<UUID, Attempt> pending = new ConcurrentHashMap<>();
+    private volatile boolean closed;
+
+    public AdminCharacterIssuer(CharacterStorage storage, Supplier<CharacterRecord> allocate,
+                                Consumer<Runnable> nextTick, Consumer<Failure> failures) {
+        this.storage = Objects.requireNonNull(storage);
+        this.allocate = Objects.requireNonNull(allocate);
+        this.nextTick = Objects.requireNonNull(nextTick);
+        this.failures = Objects.requireNonNull(failures);
+    }
+
+    /** Must be entered on the server thread. Completion is delivered on that thread. */
+    public void issue(Player player, Consumer<Outcome> response) {
+        Objects.requireNonNull(player); Objects.requireNonNull(response);
+        if (closed || !player.isOnline()) { response.accept(Outcome.STALE); return; }
+        int slot = player.getInventory().firstEmpty();
+        if (slot < 0) { response.accept(Outcome.FULL); return; }
+        var attempt = new Attempt(player, slot, response);
+        if (pending.putIfAbsent(attempt.playerId, attempt) != null) { response.accept(Outcome.BUSY); return; }
+        try {
+            attempt.record = allocate.get();
+            attempt.preparation = storage.prepareCraft(List.of(attempt.record));
+            attempt.preparation.ready().whenComplete((batch, failure) -> schedule(attempt, batch, failure));
+        } catch (RuntimeException failure) {
+            pending.remove(attempt.playerId, attempt);
+            abandon(attempt);
+            report(attempt, "prepare", failure);
+            response.accept(Outcome.SAVE_FAILED);
+        }
+    }
+
+    private void schedule(Attempt attempt, CharacterStorage.CraftBatch batch, Throwable failure) {
+        if (closed || pending.get(attempt.playerId) != attempt) { abandon(attempt); return; }
+        try { nextTick.accept(() -> complete(attempt, batch, failure)); }
+        catch (RuntimeException rejected) {
+            pending.remove(attempt.playerId, attempt); abandon(attempt); report(attempt, "schedule", rejected);
+        }
+    }
+
+    private void complete(Attempt attempt, CharacterStorage.CraftBatch batch, Throwable failure) {
+        if (closed || !pending.remove(attempt.playerId, attempt)) { abandon(attempt); return; }
+        if (failure != null) {
+            abandon(attempt); report(attempt, "save", failure); respond(attempt, Outcome.SAVE_FAILED); return;
+        }
+        var occupying = attempt.player.getInventory().getItem(attempt.slot);
+        if (!attempt.player.isOnline() || attempt.slot < 0 || attempt.slot >= 36
+                || occupying != null && !occupying.getType().isAir()) {
+            abandon(attempt); respond(attempt, Outcome.STALE); return;
+        }
+        var claimed = batch.claimForDelivery();
+        if (claimed.isEmpty() || claimed.orElseThrow().size() != 1
+                || !claimed.orElseThrow().getFirst().id().equals(attempt.record.id())) {
+            abandon(attempt); respond(attempt, Outcome.RETAINED); return;
+        }
+        try {
+            var sheet = new CharacterSheets().create(attempt.record);
+            attempt.player.getInventory().setItem(attempt.slot, sheet);
+            attempt.delivered = true;
+        } catch (RuntimeException uncertain) {
+            report(attempt, "delivery", uncertain);
+            respond(attempt, Outcome.RETAINED);
+            return;
+        }
+        try { attempt.player.updateInventory(); }
+        catch (RuntimeException syncFailure) { report(attempt, "sync", syncFailure); }
+        respond(attempt, Outcome.DELIVERED);
+    }
+
+    private void respond(Attempt attempt, Outcome outcome) {
+        try { attempt.response.accept(outcome); }
+        catch (RuntimeException failure) { report(attempt, "response", failure); }
+    }
+
+    private void abandon(Attempt attempt) {
+        if (attempt.preparation == null || attempt.delivered || !attempt.abandoned.compareAndSet(false, true)) return;
+        attempt.preparation.abandon().thenAccept(cleanup -> {
+            if (!cleanup.retained().isEmpty()) report(attempt, "cleanup-retained", null);
+        });
+    }
+
+    private void report(Attempt attempt, String operation, Throwable cause) {
+        try { failures.accept(new Failure(attempt.playerId, attempt.record == null ? null : attempt.record.id(), operation, cause)); }
+        catch (RuntimeException ignored) { }
+    }
+
+    @Override public void close() {
+        closed = true;
+        for (var attempt : List.copyOf(pending.values())) {
+            if (pending.remove(attempt.playerId, attempt)) abandon(attempt);
+        }
+    }
+
+    private static final class Attempt {
+        final Player player; final UUID playerId; final int slot; final Consumer<Outcome> response;
+        final java.util.concurrent.atomic.AtomicBoolean abandoned = new java.util.concurrent.atomic.AtomicBoolean();
+        CharacterRecord record; CharacterStorage.CraftPreparation preparation; volatile boolean delivered;
+        Attempt(Player player, int slot, Consumer<Outcome> response) { this.player=player; this.playerId=player.getUniqueId(); this.slot=slot; this.response=response; }
+    }
+}

src/main/java/games/dmg/fantasystick/session/AdminExperienceGrant.java

@@ -0,0 +1,114 @@
+package games.dmg.fantasystick.session;
+
+import games.dmg.fantasystick.persistence.CharacterRecord;
+import games.dmg.fantasystick.persistence.CharacterStorage;
+import games.dmg.fantasystick.progression.ProgressionRules;
+import java.math.BigInteger;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.function.Consumer;
+import java.util.function.Function;
+import org.bukkit.Color;
+import org.bukkit.Sound;
+import org.bukkit.entity.Player;
+
+/** Acknowledged administrator XP mutation captured against one exact active character/session. */
+public final class AdminExperienceGrant implements AutoCloseable {
+    public enum Status { APPLIED, AT_CAP, STALE, UNAVAILABLE, FAILED }
+    public record Result(Status status, String name, BigInteger requested, BigInteger applied,
+                         int level, int levels) { }
+    public record Failure(UUID character, Throwable cause) { }
+
+    private final CharacterStorage characters;
+    private final ProgressionRules progression;
+    private final EquipmentSessions sessions;
+    private final Consumer<Runnable> nextTick;
+    private final Function<UUID, Player> players;
+    private final Consumer<Failure> failures;
+    private volatile boolean closed;
+
+    public AdminExperienceGrant(CharacterStorage characters, ProgressionRules progression, EquipmentSessions sessions,
+            Consumer<Runnable> nextTick, Function<UUID, Player> players, Consumer<Failure> failures) {
+        this.characters = Objects.requireNonNull(characters);
+        this.progression = Objects.requireNonNull(progression);
+        this.sessions = Objects.requireNonNull(sessions);
+        this.nextTick = Objects.requireNonNull(nextTick);
+        this.players = Objects.requireNonNull(players);
+        this.failures = Objects.requireNonNull(failures);
+    }
+
+    /** Returns false before persistence when the captured active identity is no longer authoritative. */
+    public boolean grant(EquipmentSessions.Active active, CharacterRecord captured, BigInteger amount,
+                         Consumer<Result> completion) {
+        Objects.requireNonNull(active); Objects.requireNonNull(captured);
+        Objects.requireNonNull(amount); Objects.requireNonNull(completion);
+        if (amount.signum() <= 0) throw new IllegalArgumentException("Experience grant must be positive");
+        if (closed || !sessions.current(active)
+                || sessions.currentRecord(active).filter(captured::equals).isEmpty()) return false;
+        characters.awardExperience(captured.id(), captured.revision(), amount, progression)
+            .whenComplete((award, failure) -> schedule(active, captured, amount, completion, award, failure));
+        return true;
+    }
+
+    private void schedule(EquipmentSessions.Active active, CharacterRecord captured, BigInteger amount,
+            Consumer<Result> completion, CharacterStorage.ExperienceAward award, Throwable failure) {
+        if (failure != null) report(captured.id(), failure);
+        if (closed) return;
+        try {
+            nextTick.accept(() -> complete(active, captured, amount, completion, award, failure));
+        } catch (RuntimeException rejected) { report(captured.id(), rejected); }
+    }
+
+    private void complete(EquipmentSessions.Active active, CharacterRecord captured, BigInteger amount,
+            Consumer<Result> completion, CharacterStorage.ExperienceAward award, Throwable failure) {
+        if (closed) return;
+        if (failure != null) {
+            completion.accept(new Result(Status.FAILED, captured.name(), amount, BigInteger.ZERO,
+                captured.level(), 0));
+            return;
+        }
+        var saved = award.record().orElse(captured);
+        Status status = switch (award.status()) {
+            case APPLIED -> Status.APPLIED;
+            case AT_CAP, UNCHANGED -> Status.AT_CAP;
+            case STALE -> Status.STALE;
+            case UNAVAILABLE -> Status.UNAVAILABLE;
+        };
+        BigInteger applied = status == Status.APPLIED
+            ? saved.experience().subtract(captured.experience()) : BigInteger.ZERO;
+        if (status == Status.APPLIED && sessions.current(active)) {
+            boolean synchronizedSession = sessions.acknowledgeProgress(active, captured.revision(), saved);
+            if (!synchronizedSession && sessions.current(active)
+                    && sessions.currentRecord(active).filter(saved::equals).isEmpty()) {
+                report(captured.id(), new IllegalStateException(
+                    "Saved administrator XP could not synchronize with its captured active session"));
+            }
+            if (synchronizedSession && sessions.current(active)) feedback(active, saved, applied, award.levels());
+        }
+        completion.accept(new Result(status, captured.name(), amount, applied, saved.level(), award.levels()));
+    }
+
+    private void feedback(EquipmentSessions.Active active, CharacterRecord saved, BigInteger applied, int levels) {
+        Player player;
+        try { player = players.apply(active.player()); }
+        catch (RuntimeException failure) { report(saved.id(), failure); return; }
+        if (player == null || !player.isOnline() || !sessions.current(active)
+                || sessions.currentRecord(active).filter(saved::equals).isEmpty()) return;
+        try {
+            player.sendMessage("Received " + applied + " fantasy XP from an administrator.");
+            for (int gained = 1; gained <= levels; gained++) {
+                int level = saved.level() - levels + gained;
+                player.sendMessage("Level " + level + "! Gained 1 character point.");
+                SessionVisuals.burst(player, Color.BLUE, 12);
+                player.playSound(player.getLocation(), Sound.ENTITY_PLAYER_LEVELUP, 1, 1);
+            }
+        } catch (RuntimeException failure) { report(saved.id(), failure); }
+    }
+
+    private void report(UUID character, Throwable failure) {
+        try { failures.accept(new Failure(character, failure)); }
+        catch (RuntimeException ignored) { /* Diagnostics do not replay a grant. */ }
+    }
+
+    @Override public void close() { closed = true; }
+}

src/main/java/games/dmg/fantasystick/session/AdminRevival.java

@@ -0,0 +1,68 @@
+package games.dmg.fantasystick.session;
+
+import games.dmg.fantasystick.items.CharacterSheets;
+import games.dmg.fantasystick.items.TailBooks;
+import games.dmg.fantasystick.persistence.CharacterRecord;
+import games.dmg.fantasystick.persistence.CharacterStorage;
+import games.dmg.fantasystick.persistence.RevivalStore;
+import java.time.Clock;
+import java.time.Duration;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import java.util.ArrayList;
+import java.util.IdentityHashMap;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.function.Consumer;
+import net.kyori.adventure.text.Component;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.inventory.Inventory;
+import org.bukkit.inventory.ItemStack;
+
+/** Admin-owned, expiring Tail selection with authoritative consume-once restoration. */
+public final class AdminRevival implements Listener, AutoCloseable {
+    public interface PopupFactory { Inventory create(int size, Component title); }
+    public interface Scheduler { AutoCloseable later(Duration delay, Runnable action); }
+    private record Candidate(int slot, ItemStack item, TailBooks.Identity identity) { }
+    private record Choice(Candidate candidate, CharacterRecord record) { }
+    private final CharacterStorage characters; private final RevivalStore reservations; private final Clock clock;
+    private final Consumer<Runnable> nextTick; private final Scheduler scheduler; private final PopupFactory popups;
+    private final Consumer<Throwable> failures; private final TailBooks tails=new TailBooks();private final CharacterSheets sheets=new CharacterSheets();
+    private final Map<Inventory,View> views=new IdentityHashMap<>();private boolean closed;
+
+    private final class View implements AutoCloseable {
+        final Player admin,target;final Inventory inventory;final Map<Integer,Choice> choices;final Instant deadline;final AutoCloseable expiry;boolean selecting,finished;
+        View(Player admin,Player target,Inventory inventory,Map<Integer,Choice> choices,Instant deadline){this.admin=admin;this.target=target;this.inventory=inventory;this.choices=choices;this.deadline=deadline;this.expiry=scheduler.later(Duration.between(clock.instant(),deadline),this::close);}
+        boolean current(){return !closed&&!finished&&admin.isOnline()&&admin.hasPermission(EquipmentAdminCommand.PERMISSION)&&target.isOnline()&&clock.instant().isBefore(deadline);}
+        @Override public void close(){if(finished)return;finished=true;views.remove(inventory,this);inventory.clear();try{expiry.close();}catch(Exception e){report(e);}try{admin.closeInventory();}catch(RuntimeException e){report(e);}}
+    }
+
+    public AdminRevival(CharacterStorage characters,RevivalStore reservations,Clock clock,Consumer<Runnable> nextTick,Scheduler scheduler,PopupFactory popups,Consumer<Throwable> failures){this.characters=Objects.requireNonNull(characters);this.reservations=Objects.requireNonNull(reservations);this.clock=Objects.requireNonNull(clock);this.nextTick=Objects.requireNonNull(nextTick);this.scheduler=Objects.requireNonNull(scheduler);this.popups=Objects.requireNonNull(popups);this.failures=Objects.requireNonNull(failures);}
+
+    public void open(Player admin,Player target,Duration timeout){Objects.requireNonNull(admin);Objects.requireNonNull(target);if(closed||!admin.isOnline()||!admin.hasPermission(EquipmentAdminCommand.PERMISSION)||!target.isOnline()){admin.sendMessage("Admin revival refused: authorization or target is no longer available.");return;}var candidates=candidates(target);if(candidates.isEmpty()){admin.sendMessage("That player has no authentic direct-inventory Tails.");return;}var loads=candidates.stream().map(c->characters.find(c.identity.characterId())).toList();CompletableFuture.allOf(loads.toArray(CompletableFuture[]::new)).whenComplete((ignored,failure)->schedule(()->{if(failure!=null){report(failure);admin.sendMessage("Admin revival could not inspect those Tails safely.");return;}if(closed||!admin.isOnline()||!admin.hasPermission(EquipmentAdminCommand.PERMISSION)||!target.isOnline())return;var choices=new ArrayList<Choice>();for(int i=0;i<candidates.size();i++){var found=loads.get(i).join();if(found.isPresent()&&eligible(found.orElseThrow(),candidates.get(i).identity)&&unchanged(target,candidates.get(i)))choices.add(new Choice(candidates.get(i),found.orElseThrow()));}if(choices.isEmpty()){admin.sendMessage("That player has no current unconsumed Tail.");return;}show(admin,target,choices,timeout);}));}
+    private List<Candidate> candidates(Player target){var result=new ArrayList<Candidate>();for(int slot=0;slot<=40;slot++){if(slot>35&&slot!=40)continue;var item=target.getInventory().getItem(slot);if(item==null||item.isEmpty())continue;var identity=tails.identify(item);if(identity.isPresent())result.add(new Candidate(slot,item.clone(),identity.orElseThrow()));}return List.copyOf(result);}
+    private boolean eligible(CharacterRecord record,TailBooks.Identity id){return record.dead()&&record.id().equals(id.characterId())&&Objects.equals(record.deathId(),id.deathId())&&!record.diedAt().isAfter(clock.instant());}
+    private static boolean unchanged(Player target,Candidate candidate){var item=target.getInventory().getItem(candidate.slot);return item!=null&&item.equals(candidate.item);}
+    private void show(Player admin,Player target,List<Choice> eligible,Duration timeout){int size=Math.min(54,Math.max(9,((eligible.size()+8)/9)*9));var inventory=popups.create(size,Component.text("Choose a Tail for "+target.getName()));var choices=new LinkedHashMap<Integer,Choice>();for(int i=0;i<eligible.size()&&i<size;i++){var choice=eligible.get(i);var item=choice.candidate.item.clone();item.setAmount(1);var meta=item.getItemMeta();meta.lore(List.of(Component.text("Character: "+choice.record.name()),Component.text("Level "+choice.record.level()+" · target slot "+choice.candidate.slot),Component.text("Click to restore this exact death")));item.setItemMeta(meta);inventory.setItem(i,item);choices.put(i,choice);}var view=new View(admin,target,inventory,Map.copyOf(choices),clock.instant().plus(timeout));views.put(inventory,view);admin.openInventory(inventory);}
+
+    @EventHandler(priority=EventPriority.HIGHEST) public void click(org.bukkit.event.inventory.InventoryClickEvent event){var view=views.get(event.getView().getTopInventory());if(view==null)return;event.setCancelled(true);if(event.getWhoClicked()!=view.admin||event.getRawSlot()<0||event.getRawSlot()>=view.inventory.getSize())return;var choice=view.choices.get(event.getRawSlot());if(choice==null||view.selecting)return;view.selecting=true;views.remove(view.inventory,view);view.inventory.clear();view.admin.closeInventory();confirm(view,choice);}
+    @EventHandler(priority=EventPriority.HIGHEST) public void drag(org.bukkit.event.inventory.InventoryDragEvent event){var view=views.get(event.getView().getTopInventory());if(view!=null&&event.getRawSlots().stream().anyMatch(slot->slot<view.inventory.getSize()))event.setCancelled(true);}
+    @EventHandler(priority=EventPriority.MONITOR) public void close(org.bukkit.event.inventory.InventoryCloseEvent event){var view=views.get(event.getView().getTopInventory());if(view!=null&&!view.selecting)view.close();}
+    @EventHandler(priority=EventPriority.MONITOR) public void quit(org.bukkit.event.player.PlayerQuitEvent event){for(var view:List.copyOf(views.values()))if(view.admin==event.getPlayer()||view.target==event.getPlayer())view.close();}
+
+    private void confirm(View view,Choice choice){if(!view.current()||!unchanged(view.target,choice.candidate)){view.close();return;}characters.find(choice.record.id()).whenComplete((found,failure)->schedule(()->{if(failure!=null){report(failure);view.admin.sendMessage("Admin revival could not recheck that Tail; no item changed.");view.close();return;}if(!view.current()||found.isEmpty()||!eligible(found.orElseThrow(),choice.candidate.identity)||!unchanged(view.target,choice.candidate)){view.admin.sendMessage("That Tail selection is stale; no item changed.");view.close();return;}reserve(view,choice.candidate,found.orElseThrow());}));}
+    private void reserve(View view,Candidate candidate,CharacterRecord dead){var source=view.target.getInventory().getItem(candidate.slot);int destination=source.getAmount()==1?-1:emptySlot(view.target,candidate.slot);if(source.getAmount()>1&&destination<0){view.admin.sendMessage("Admin revival needs one empty direct inventory slot to preserve copied Tails.");view.close();return;}var reservation=new RevivalStore.Reservation(UUID.randomUUID(),view.admin.getUniqueId(),view.target.getUniqueId(),dead.id(),dead.deathId(),clock.instant().truncatedTo(ChronoUnit.SECONDS),candidate.slot,source.getAmount(),destination,true);reservations.reserve(reservation).whenComplete((saved,failure)->schedule(()->{if(failure!=null){report(failure);view.admin.sendMessage("Admin revival reservation failed; no item changed.");view.close();return;}if(saved.isEmpty()||!view.current()||!unchanged(view.target,candidate)){view.admin.sendMessage("Admin revival became stale after reservation; no item changed.");view.close();return;}deliver(view,dead,reservation);}));}
+    private static int emptySlot(Player target,int source){for(int slot=0;slot<=40;slot++){if(slot>35&&slot!=40||slot==source)continue;var item=target.getInventory().getItem(slot);if(item==null||item.isEmpty())return slot;}return-1;}
+    private void deliver(View view,CharacterRecord dead,RevivalStore.Reservation reservation){try{var provisional=new CharacterRecord(dead.id(),dead.name(),dead.revision(),dead.stats(),dead.level(),dead.experience(),dead.unspentPoints(),dead.maximumHealth(),dead.learned(),dead.loadout(),dead.cooldowns(),dead.restrictedKills(),false,dead.deathId(),dead.diedAt());var sheet=sheets.create(provisional);var source=view.target.getInventory().getItem(reservation.sourceSlot());if(reservation.sourceAmount()==1)view.target.getInventory().setItem(reservation.sourceSlot(),sheet);else{view.target.getInventory().setItem(reservation.destinationSlot(),sheet);var remaining=source.clone();remaining.setAmount(reservation.sourceAmount()-1);view.target.getInventory().setItem(reservation.sourceSlot(),remaining);}view.target.updateInventory();}catch(RuntimeException uncertain){report(uncertain);view.admin.sendMessage("Admin revival delivery is uncertain; retained proof requires recovery.");view.close();return;}characters.restoreDeathRecordAdministratively(reservation.character(),reservation.death(),NativeHealthLimit.read()).whenComplete((restored,failure)->schedule(()->{if(failure!=null||restored.isEmpty()){if(failure!=null)report(failure);view.admin.sendMessage("The Tail changed, but restoration is pending proof-based recovery.");view.close();return;}if(installFinal(view.target,restored.orElseThrow())){reservations.clear(reservation.character(),reservation.id()).exceptionally(error->{report(error);return false;});view.admin.sendMessage("Administratively restored "+restored.orElseThrow().name()+" for "+view.target.getName()+".");view.target.sendMessage("An administrator restored character sheet: "+restored.orElseThrow().name()+".");}else view.admin.sendMessage("Character restoration was saved, but sheet custody is ambiguous; retained proof requires recovery.");view.close();}));}
+    private boolean installFinal(Player target,CharacterRecord record){int found=-1;for(int slot=0;slot<=40;slot++){if(slot>35&&slot!=40)continue;if(sheets.identify(target.getInventory().getItem(slot)).filter(record.id()::equals).isEmpty())continue;if(found>=0)return false;found=slot;}if(found<0)return false;target.getInventory().setItem(found,sheets.create(record));target.updateInventory();return true;}
+    private void schedule(Runnable action){try{nextTick.accept(action);}catch(RuntimeException rejected){report(rejected);}}
+    private void report(Throwable failure){try{failures.accept(failure);}catch(RuntimeException ignored){}}
+    @Override public void close(){if(closed)return;closed=true;for(var view:List.copyOf(views.values()))view.close();views.clear();}
+}

src/main/java/games/dmg/fantasystick/session/EquipmentSessionEvents.java

@@ -40,7 +40,7 @@ public final class EquipmentSessionEvents implements Listener, AutoCloseable {
     private final Consumer<Runnable> nextTick;
     private final Consumer<EquipmentSessions.Failure> diagnostics;
     private final CharacterSheets sheets = new CharacterSheets();
-    private final SessionControls controls = new SessionControls();
+    private SessionControls controls = new SessionControls();
     private static final class Intent { boolean started; }
     private final Map<UUID, Intent> swaps = new HashMap<>();
     private final Map<UUID, UUID> observed = new HashMap<>();
@@ -88,6 +88,12 @@ public final class EquipmentSessionEvents implements Listener, AutoCloseable {
         sessions.attachCursorCustody(this::cancelCustody);
     }
 
+    /** Install before registration so extensible controls keep the same structural containment catalogue. */
+    public void attachAbilityRegistry(games.dmg.fantasystick.ability.AbilityRegistry registry) {
+        if (closed || !draws.isEmpty()) throw new IllegalStateException("Input handling already started");
+        controls = new SessionControls(Objects.requireNonNull(registry));
+    }
+
     /** The input recipient belongs to this plugin; it does not authorize vanilla item use. */
     public EquipmentSessionEvents(EquipmentSessions sessions, Consumer<Runnable> nextTick,
                                   Consumer<EquipmentSessions.Failure> diagnostics, Consumer<ControlInput> inputs) {
@@ -337,8 +343,16 @@ public final class EquipmentSessionEvents implements Listener, AutoCloseable {
         if (allowed && event.getHand() == EquipmentSlot.HAND && (event.getAction() == org.bukkit.event.block.Action.RIGHT_CLICK_AIR
                 || event.getAction() == org.bukkit.event.block.Action.RIGHT_CLICK_BLOCK)) {
             var selected = sessions.selectedControl(event.getPlayer(), event.getItem()).orElse(null);
-            if (selected != null && useGesture(selected)) emit(event.getPlayer(), event.getItem(), selected,
-                ControlInput.Gesture.USE, null, 0, 0);
+            if (selected != null && useGesture(selected)) {
+                org.bukkit.entity.Entity target = selected.ability().equals("hex")
+                        || selected.ability().equals("mending_light")
+                        || selected.ability().equals("guardian_bond")
+                    ? event.getPlayer().getTargetEntity(64)
+                    : selected.ability().equals("inspire") || selected.ability().equals("purify")
+                        ? event.getPlayer().isSneaking() ? event.getPlayer() : event.getPlayer().getTargetEntity(64)
+                        : null;
+                emit(event.getPlayer(), event.getItem(), selected, ControlInput.Gesture.USE, target, 0, 0);
+            }
             else if (selected != null && selected.ability().equals("longbow")) beginDraw(event.getPlayer(), event.getItem(), selected);
         }
     }
@@ -410,12 +424,11 @@ public final class EquipmentSessionEvents implements Listener, AutoCloseable {
 
     private void emit(Player player, ItemStack item, EquipmentSessions.SelectedControl selected,
                       ControlInput.Gesture gesture, org.bukkit.entity.Entity target, int heldTicks, float strength) {
-        var captured = item.clone();
         var kind = selected.slot() == 0 ? ControlInput.Kind.BOOK
             : selected.slot() == 1 ? ControlInput.Kind.BASIC_ATTACK : ControlInput.Kind.ABILITY;
         var input = new ControlInput(player, selected.session(), selected.slot(), selected.ability(), kind,
             gesture, target, heldTicks, strength,
-            () -> !closed && sessions.selectedControl(player, captured).filter(selected::equals).isPresent());
+            () -> !closed && sessions.currentControl(player, selected));
         if (!input.stillCurrent()) return;
         try { inputs.accept(input); }
         catch (RuntimeException failure) { report(player.getUniqueId(), selected.session().session(), failure); }
@@ -428,8 +441,11 @@ public final class EquipmentSessionEvents implements Listener, AutoCloseable {
         if (special(item)) event.setCancelled(true);
         if (event.getHand() == EquipmentSlot.HAND) {
             var selected = sessions.selectedControl(player, item).orElse(null);
-            if (selected != null && useGesture(selected)) emit(player, item, selected,
-                ControlInput.Gesture.USE, event.getRightClicked(), 0, 0);
+            if (selected != null && useGesture(selected)) {
+                org.bukkit.entity.Entity target = selected.ability().equals("inspire") && player.isSneaking()
+                    ? player : event.getRightClicked();
+                emit(player, item, selected, ControlInput.Gesture.USE, target, 0, 0);
+            }
         }
     }
 
@@ -443,7 +459,8 @@ public final class EquipmentSessionEvents implements Listener, AutoCloseable {
         if (special(item)) event.setCancelled(true);
         if (willAttack) {
             var selected = sessions.selectedControl(player, item).orElse(null);
-            if (selected != null && (selected.slot() == 1 || selected.ability().equals("great_sword"))) {
+            if (selected != null && (selected.slot() == 1 || selected.ability().equals("great_sword")
+                    || selected.ability().equals("shield_bash"))) {
                 emit(player, item, selected, ControlInput.Gesture.ATTACK, event.getAttacked(), 0, player.getAttackCooldown());
             }
         }

src/main/java/games/dmg/fantasystick/session/EquipmentSessions.java

@@ -6,11 +6,13 @@ import games.dmg.fantasystick.items.SessionControls;
 import games.dmg.fantasystick.persistence.CharacterRecord;
 import games.dmg.fantasystick.persistence.CharacterStorage;
 import games.dmg.fantasystick.persistence.EquipmentSessionStore;
+import java.math.BigInteger;
 import java.time.Clock;
 import java.time.Duration;
 import java.time.Instant;
 import java.util.Arrays;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Optional;
@@ -33,11 +35,13 @@ public final class EquipmentSessions implements AutoCloseable {
     public record Notice(UUID player, String code, String message) { }
     public record Failure(UUID player, UUID session, Throwable cause) { }
     public record Active(UUID player, UUID session, UUID character) { }
+    public record ActiveCharacter(Active session, CharacterRecord record) { }
     public record SelectedControl(Active session, int slot, String ability) { }
 
     private final CharacterStorage characters;
     private final EquipmentSessionStore receipts;
-    private final Duration switchDelay;
+    private Supplier<Duration> switchDelay;
+    private java.util.function.BooleanSupplier roleplayDisabled = () -> false;
     private final Clock clock;
     private final Consumer<Runnable> nextTick;
     private final Consumer<Notice> notices;
@@ -45,11 +49,13 @@ public final class EquipmentSessions implements AutoCloseable {
     private games.dmg.fantasystick.presentation.SessionPresentation presentation = games.dmg.fantasystick.presentation.SessionPresentation.NONE;
     private final SessionClaims claims = new SessionClaims();
     private final EquipmentStorage equipment = new EquipmentStorage();
-    private final SessionControls controls = new SessionControls();
+    private SessionControls controls;
     private final CharacterSheets sheets = new CharacterSheets();
     private final Map<UUID, Attempt> pending = new HashMap<>();
     private final Map<UUID, Attempt> owned = new HashMap<>();
     private final Map<UUID, Attempt> active = new HashMap<>();
+    private final java.util.ArrayDeque<UUID> cooldownRefreshOrder = new java.util.ArrayDeque<>();
+    private final java.util.Set<UUID> cooldownRefreshQueued = new java.util.HashSet<>();
     // Covers reentrant inventory setters and client sync, not just asynchronous work.
     private final Map<UUID, Attempt> transitioning = new HashMap<>();
     private Consumer<UUID> cursorCustody = ignored -> { };
@@ -78,6 +84,7 @@ public final class EquipmentSessions implements AutoCloseable {
         boolean effectsStarted;
         String previousGameMode;
         boolean modeStarted;
+        Instant nextCooldownVisualChange;
         games.dmg.fantasystick.persistence.OrdinaryVitals ordinaryVitals;
         boolean vitalsStarted;
         boolean healthSaveRequested;
@@ -90,6 +97,7 @@ public final class EquipmentSessions implements AutoCloseable {
         boolean uncertainSave;
         boolean nativeUncertain;
         boolean exitRequested;
+        Duration exitDelay;
         boolean arrival;
         Attempt recoveryOwner;
         org.bukkit.Location entryLocation;
@@ -117,8 +125,10 @@ public final class EquipmentSessions implements AutoCloseable {
                              Consumer<Runnable> nextTick, Consumer<Notice> notices, Consumer<Failure> diagnostics) {
         this.characters = Objects.requireNonNull(characters);
         this.receipts = Objects.requireNonNull(receipts);
-        this.switchDelay = Objects.requireNonNull(switchDelay);
+        var initialSwitchDelay = Objects.requireNonNull(switchDelay);
+        this.switchDelay = () -> initialSwitchDelay;
         this.clock = Objects.requireNonNull(clock);
+        this.controls = new SessionControls(new games.dmg.fantasystick.ability.AbilityRegistry(), clock);
         if (switchDelay.isNegative()) throw new IllegalArgumentException("Negative switch delay");
         this.nextTick = Objects.requireNonNull(nextTick);
         this.notices = Objects.requireNonNull(notices);
@@ -141,6 +151,25 @@ public final class EquipmentSessions implements AutoCloseable {
         this.gameModes = Objects.requireNonNull(gameModes);
     }
 
+    /** Install before exposing entry so later checks/exits capture the acknowledged live policy. */
+    public synchronized void attachSwitchDelay(Supplier<Duration> policy) {
+        if (!owned.isEmpty()) throw new IllegalStateException("Sessions already started");
+        switchDelay = Objects.requireNonNull(policy);
+        if (switchDelay.get().isNegative()) throw new IllegalArgumentException("Negative switch delay");
+    }
+
+    /** Install before exposing entry so pending and new activation work revalidates availability. */
+    public synchronized void attachRoleplayDisabled(java.util.function.BooleanSupplier policy) {
+        if (!owned.isEmpty()) throw new IllegalStateException("Sessions already started");
+        roleplayDisabled = Objects.requireNonNull(policy);
+    }
+
+    /** Install before exposing entry so registered definitions drive delivered control metadata. */
+    public synchronized void attachAbilityRegistry(games.dmg.fantasystick.ability.AbilityRegistry registry) {
+        if (!owned.isEmpty()) throw new IllegalStateException("Sessions already started");
+        controls = new SessionControls(Objects.requireNonNull(registry), clock);
+    }
+
     /** Install before exposing entry; equipment-only adapter tests can omit the health overlay. */
     public synchronized void attachVitals(SessionVitals value) {
         if (vitals != null || !owned.isEmpty()) throw new IllegalStateException("Vitals already attached or sessions started");
@@ -201,7 +230,103 @@ public final class EquipmentSessions implements AutoCloseable {
             && sheets.identify(attempt.player.getInventory().getItemInOffHand()).filter(attempt.character::equals).isPresent();
     }
 
+    /** Side-effect-free server-thread snapshots for exact active-character command resolution/autocomplete. */
+    public synchronized List<ActiveCharacter> activeCharacters() {
+        if (closed) return List.of();
+        return active.values().stream().filter(attempt -> attempt.record != null)
+            .map(attempt -> new ActiveCharacter(new Active(attempt.owner, attempt.session, attempt.character), attempt.record))
+            .filter(snapshot -> current(snapshot.session())).toList();
+    }
+
+    /** Current active holder for a transferable identity, used only to synchronize acknowledged character writes. */
+    public synchronized Optional<Active> activeCharacter(UUID character) {
+        Objects.requireNonNull(character);
+        return active.values().stream().filter(attempt -> attempt.record != null && attempt.character.equals(character))
+            .filter(attempt -> current(new Active(attempt.owner, attempt.session, attempt.character)))
+            .map(attempt -> new Active(attempt.owner, attempt.session, attempt.character)).findFirst();
+    }
+
+    /** Current transferable character snapshot for a still-authorized server-thread action. */
+    public synchronized Optional<CharacterRecord> currentRecord(Active session) {
+        var attempt = active.get(session.player());
+        return current(session) && attempt != null && attempt.record != null
+            ? Optional.of(attempt.record) : Optional.empty();
+    }
+
+    /** Apply a persisted progression revision to the still-current active session. */
+    public synchronized boolean acknowledgeProgress(Active session, BigInteger expectedRevision, CharacterRecord saved) {
+        var attempt = active.get(session.player());
+        if (closed || attempt == null || attempt.session == null || attempt.record == null
+                || !attempt.session.equals(session.session()) || !attempt.character.equals(session.character())
+                || !attempt.record.revision().equals(expectedRevision) || !saved.id().equals(attempt.character)
+                || !saved.revision().equals(expectedRevision.add(BigInteger.ONE)) || !current(session)) return false;
+        var previous = attempt.record;
+        if (vitals != null) vitals.updateProgress(attempt.player, attempt.session, previous, saved);
+        attempt.record = saved; // Persisted truth precedes any reentrant native presentation setter.
+        if ((!previous.loadout().equals(saved.loadout()) || !previous.cooldowns().equals(saved.cooldowns()))
+                && !refreshControls(attempt, session)) return false;
+        return true;
+    }
+
+    /** Bounded server-tick refresh of active cooldown controls; persisted deadlines are not mutated. */
+    public synchronized void refreshCooldownControls(int maximumSessions) {
+        if (maximumSessions <= 0) throw new IllegalArgumentException("Cooldown refresh bound must be positive");
+        int checks = Math.min(maximumSessions, cooldownRefreshOrder.size());
+        for (int checked = 0; checked < checks; checked++) {
+            UUID owner = cooldownRefreshOrder.removeFirst();
+            var attempt = active.get(owner);
+            if (attempt == null || attempt.record == null || attempt.session == null) {
+                cooldownRefreshQueued.remove(owner);
+                continue;
+            }
+            cooldownRefreshOrder.addLast(owner);
+            if (attempt.nextCooldownVisualChange != null && !clock.instant().isBefore(attempt.nextCooldownVisualChange)) {
+                refreshControls(attempt, new Active(attempt.owner, attempt.session, attempt.character));
+            }
+        }
+    }
+
+    private void queueCooldownRefresh(Attempt attempt) {
+        if (cooldownRefreshQueued.add(attempt.owner)) cooldownRefreshOrder.addLast(attempt.owner);
+    }
+
+    private boolean refreshControls(Attempt attempt, Active session) {
+        var refreshed = controls.create(attempt.record, attempt.owner, attempt.session);
+        boolean changed = false;
+        for (int slot = 2; slot < 9; slot++) {
+            if (active.get(attempt.owner) != attempt || !current(session)) return false;
+            if (Objects.equals(attempt.player.getInventory().getItem(slot), refreshed[slot])) continue;
+            attempt.player.getInventory().setItem(slot, refreshed[slot]);
+            changed = true;
+        }
+        if (changed) attempt.player.updateInventory(); // No planned native writes after this reentrant boundary.
+        if (active.get(attempt.owner) != attempt || !current(session)) return false;
+        attempt.nextCooldownVisualChange = nextCooldownVisualChange(attempt.record);
+        return true;
+    }
+
+    private Instant nextCooldownVisualChange(CharacterRecord record) {
+        var now = clock.instant();
+        return record.loadout().stream().filter(ability -> !ability.isEmpty())
+            .map(record.cooldowns()::get).filter(Objects::nonNull).filter(deadline -> now.isBefore(deadline))
+            .min(Instant::compareTo).orElse(null);
+    }
+
     /** Server-thread authorization for the currently held, issued control and saved loadout. */
+    public synchronized boolean currentControl(Player player, SelectedControl selected) {
+        if (selected == null) return false;
+        var attempt = active.get(player.getUniqueId());
+        if (closed || attempt == null || attempt.player != player || attempt.record == null
+                || !current(selected.session()) || selected.slot() != player.getInventory().getHeldItemSlot()) return false;
+        var actual = player.getInventory().getItem(selected.slot());
+        var identity = controls.identify(actual).orElse(null);
+        if (identity == null || identity.slot() != selected.slot() || !identity.owner().equals(attempt.owner)
+                || !identity.session().equals(attempt.session)) return false;
+        String ability = selected.slot() < 2 ? "" : controls.ability(actual).orElse("");
+        return ability.equals(selected.ability()) && (selected.slot() < 2
+            || ability.equals(attempt.record.loadout().get(selected.slot() - 2)));
+    }
+
     public synchronized Optional<SelectedControl> selectedControl(Player player, ItemStack reported) {
         var attempt = active.get(player.getUniqueId());
         if (closed || attempt == null || attempt.player != player || !player.isOnline() || attempt.record == null
@@ -224,6 +349,10 @@ public final class EquipmentSessions implements AutoCloseable {
     public synchronized void enter(Player player) {
         UUID owner = player.getUniqueId();
         if (closed) return;
+        if (roleplayDisabled.getAsBoolean()) {
+            notice(owner, "ROLEPLAY_DISABLED", "Fantasy roleplaying is disabled; the character sheet was not activated.");
+            return;
+        }
         if (transitioning.containsKey(owner)) {
             notice(owner, "BUSY", "An equipment transition is still completing; retry afterwards."); return;
         }
@@ -283,6 +412,10 @@ public final class EquipmentSessions implements AutoCloseable {
 
     private synchronized void loaded(Attempt attempt, Loaded loaded, Throwable failure) {
         if (!entryCurrent(attempt) || attempt.claim != null) return;
+        if (roleplayDisabled.getAsBoolean()) {
+            refuse(attempt, "ROLEPLAY_DISABLED", "Fantasy roleplaying was disabled before activation completed.");
+            return;
+        }
         if (failure != null) { fail(attempt, failure); return; }
         var record = loaded.character().orElse(null);
         if (record == null || record.dead() || record.health().signum() <= 0) {
@@ -294,7 +427,7 @@ public final class EquipmentSessions implements AutoCloseable {
                 refuse(attempt, "RECOVERY_REQUIRED", "An unresolved equipment receipt requires validated recovery."); return;
             }
             Instant now = clock.instant();
-            if (!state.canEnter(attempt.character, switchDelay, now)) {
+            if (!state.canEnter(attempt.character, switchDelay.get(), now)) {
                 Duration remaining = Duration.between(now, state.lastExit().deadline());
                 long seconds = remaining.getSeconds() + (remaining.getNano() == 0 ? 0 : 1);
                 refuse(attempt, "COOLDOWN", "Wait " + seconds + " seconds to switch characters (until "
@@ -333,6 +466,10 @@ public final class EquipmentSessions implements AutoCloseable {
 
     private synchronized void complete(Attempt attempt, Optional<CharacterRecord> fresh, Throwable failure) {
         if (!entryCurrent(attempt)) return;
+        if (roleplayDisabled.getAsBoolean()) {
+            refuse(attempt, "ROLEPLAY_DISABLED", "Fantasy roleplaying was disabled before activation completed.");
+            return;
+        }
         if (failure != null) { fail(attempt, failure); return; }
         var record = fresh.orElse(null);
         if (record == null || record.dead() || record.health().signum() <= 0) {
@@ -358,6 +495,8 @@ public final class EquipmentSessions implements AutoCloseable {
                 refuse(attempt, result.name(), "Equipment entry refused: " + result); return;
             }
             packed = true;
+            try { sheets.applyModel(attempt.player.getInventory().getItemInOffHand()); }
+            catch (RuntimeException cosmeticFailure) { diagnostic(attempt, cosmeticFailure); }
             if (interrupted(attempt)) return;
             for (int slot = 0; slot < 9; slot++) {
                 attempt.player.getInventory().setItem(slot, items[slot]);
@@ -373,7 +512,9 @@ public final class EquipmentSessions implements AutoCloseable {
             pending.remove(attempt.owner, attempt);
             if (!attempt.exitRequested) {
                 attempt.record = record;
+                attempt.nextCooldownVisualChange = nextCooldownVisualChange(record);
                 active.put(attempt.owner, attempt);
+                queueCooldownRefresh(attempt);
                 attempt.presentationInstalled = true;
                 try { presentation.activate(attempt.player, attempt.session, record); }
                 catch (RuntimeException | LinkageError error) { withdrawPresentation(attempt); diagnostic(attempt, error); }
@@ -411,6 +552,7 @@ public final class EquipmentSessions implements AutoCloseable {
         UUID owner = player.getUniqueId();
         var transition = transitioning.get(owner);
         if (transition != null) {
+            captureExitDelay(transition);
             active.remove(owner, transition);
             withdrawPresentation(transition);
             transition.exitRequested = true;
@@ -420,6 +562,7 @@ public final class EquipmentSessions implements AutoCloseable {
         cancelEntry(owner);
         var attempt = active.remove(owner);
         if (attempt == null) { invalidateCursor(owner); return EquipmentStorage.RestoreResult.NOT_FOUND; }
+        captureExitDelay(attempt);
         return restoreExit(attempt);
     }
 
@@ -564,6 +707,7 @@ public final class EquipmentSessions implements AutoCloseable {
     }
 
     private EquipmentStorage.RestoreResult restoreExit(Attempt attempt) {
+        captureExitDelay(attempt);
         active.remove(attempt.owner, attempt);
         withdrawPresentation(attempt);
         boolean reserved = transitioning.putIfAbsent(attempt.owner, attempt) == null;
@@ -660,19 +804,35 @@ public final class EquipmentSessions implements AutoCloseable {
         return false;
     }
 
+    private void captureExitDelay(Attempt attempt) {
+        if (attempt.exitDelay != null) return;
+        var delay = Objects.requireNonNull(switchDelay.get());
+        if (delay.isNegative()) throw new IllegalStateException("Negative switch delay policy");
+        attempt.exitDelay = delay;
+    }
+
     private void persistExit(Attempt attempt, boolean restored) {
+        captureExitDelay(attempt); // Recovery attempts have no process-local exit request to capture earlier.
         attempt.nativeRestored = restored;
         boolean complete = restored && (attempt.healthAcknowledged || attempt.defeated);
         attempt.saving = true;
         persist(() -> complete
-            ? receipts.completeExit(attempt.owner, attempt.session, switchDelay)
-            : receipts.recordExit(attempt.owner, attempt.session, switchDelay), (state, failure) -> {
+            ? receipts.completeExit(attempt.owner, attempt.session, attempt.exitDelay)
+            : receipts.recordExit(attempt.owner, attempt.session, attempt.exitDelay), (state, failure) -> {
                 attempt.saving = false;
                 if (failure != null) diagnostic(attempt, failure);
                 else if (complete) { attempt.gearAcknowledged = true; release(attempt); }
             });
     }
 
+    /** Cancel pending activation and route every active player through ordinary restoration. */
+    public synchronized void disableRoleplay() {
+        for (var attempt : java.util.List.copyOf(pending.values())) {
+            refuse(attempt, "ROLEPLAY_DISABLED", "Fantasy roleplaying was disabled before activation completed.");
+        }
+        for (var attempt : java.util.List.copyOf(active.values())) exit(attempt.player);
+    }
+
     public synchronized void cancelEntry(UUID player) {
         var attempt = pending.remove(player);
         if (attempt != null) abandon(attempt);

src/main/java/games/dmg/fantasystick/session/NutritionPolicy.java

@@ -0,0 +1,48 @@
+package games.dmg.fantasystick.session;
+
+import java.util.Objects;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+
+/** Active-session-only hunger/exhaustion suppression; explicit non-food healing remains native. */
+public final class NutritionPolicy implements Listener, AutoCloseable {
+    private final EquipmentSessions sessions;
+    private boolean closed;
+
+    public NutritionPolicy(EquipmentSessions sessions) {
+        this.sessions = Objects.requireNonNull(sessions);
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void food(org.bukkit.event.entity.FoodLevelChangeEvent event) {
+        if (!active(event.getEntity())) return;
+        event.setCancelled(true);
+        var player = (Player) event.getEntity();
+        player.setFoodLevel(20);
+        player.setExhaustion(0);
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void exhaustion(org.bukkit.event.entity.EntityExhaustionEvent event) {
+        if (!active(event.getEntity())) return;
+        event.setCancelled(true);
+        var player = (Player) event.getEntity();
+        player.setFoodLevel(20);
+        player.setExhaustion(0);
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void healing(org.bukkit.event.entity.EntityRegainHealthEvent event) {
+        if (event.getRegainReason() == org.bukkit.event.entity.EntityRegainHealthEvent.RegainReason.SATIATED
+                && active(event.getEntity())) event.setCancelled(true);
+    }
+
+    private boolean active(org.bukkit.entity.Entity entity) {
+        return !closed && entity instanceof Player player
+            && sessions.active(player.getUniqueId()).isPresent();
+    }
+
+    @Override public void close() { closed = true; }
+}

src/main/java/games/dmg/fantasystick/session/SessionVitals.java

@@ -57,10 +57,15 @@ public final class SessionVitals implements AutoCloseable {
             if (closed) throw new IllegalStateException("Vitals lifetime ended during entry");
             player.setHealthScale(maximum);
             if (closed) throw new IllegalStateException("Vitals lifetime ended during entry");
+            player.setFoodLevel(20);
+            player.setExhaustion(0);
+            if (closed) throw new IllegalStateException("Vitals lifetime ended during entry");
             write(player, new Mark(session, Phase.APPLIED, maximum, ordinary));
         } catch (RuntimeException | LinkageError failure) {
             try { releaseMaximum(player, session); }
             catch (RuntimeException | LinkageError cleanup) { failure.addSuppressed(cleanup); }
+            try { restoreNutrition(player, ordinary); }
+            catch (RuntimeException | LinkageError cleanup) { failure.addSuppressed(cleanup); }
             try { restoreScale(player, maximum, ordinary); }
             catch (RuntimeException | LinkageError cleanup) { failure.addSuppressed(cleanup); }
             // Leave APPLYING proof and the acknowledged receipt: an uncertain health setter
@@ -69,6 +74,30 @@ public final class SessionVitals implements AutoCloseable {
         }
     }
 
+    /** Apply an acknowledged stat revision to the live native health pool exactly once. */
+    public void updateProgress(Player player, UUID session, CharacterRecord previous, CharacterRecord saved) {
+        Objects.requireNonNull(previous);
+        Objects.requireNonNull(saved);
+        var mark = read(player);
+        var lease = leases.get(player.getUniqueId());
+        if (closed || mark == null || mark.phase() != Phase.APPLIED || !mark.session().equals(session)
+                || lease == null || !lease.session().equals(session) || !previous.id().equals(saved.id())
+                || !previous.revision().add(java.math.BigInteger.ONE).equals(saved.revision())) {
+            throw new IllegalStateException("No matching active fantasy vitals revision");
+        }
+        double nextMaximum = saved.maximumHealth().min(NativeHealthLimit.read()).doubleValue();
+        double gain = Math.max(0, nextMaximum - mark.maximum());
+        if (gain == 0 && nextMaximum == mark.maximum()) return;
+        var nativeAttribute = Objects.requireNonNull(((CraftPlayer) player).getHandle()
+            .getAttribute(net.minecraft.world.entity.ai.attributes.Attributes.MAX_HEALTH));
+        lease.maximum().close();
+        var replacement = new NativeMaximumHealth(nativeAttribute, nextMaximum);
+        leases.put(player.getUniqueId(), new Lease(session, replacement));
+        player.setHealth(Math.min(nextMaximum, player.getHealth() + gain));
+        player.setHealthScale(nextMaximum);
+        write(player, new Mark(session, Phase.APPLIED, nextMaximum, mark.ordinary()));
+    }
+
     public BigDecimal remaining(Player player, UUID session, OrdinaryVitals ordinary) {
         var mark = read(player);
         if (mark == null || !mark.session().equals(session) || !mark.ordinary().equals(ordinary) || mark.phase() != Phase.APPLIED) {
@@ -97,7 +126,7 @@ public final class SessionVitals implements AutoCloseable {
         // completion). Restore positive health first: a zero-health packet opens a client death
         // screen even when Paper cancels the death and the server-side player survives.
         player.setHealth(Math.min(ordinary.health(), Objects.requireNonNull(player.getAttribute(Attribute.MAX_HEALTH)).getValue()));
-        player.setFoodLevel(ordinary.food()); player.setSaturation(ordinary.saturation()); player.setExhaustion(ordinary.exhaustion());
+        restoreNutrition(player, ordinary);
         restoreScale(player, mark.maximum(), ordinary);
         write(player, new Mark(session, Phase.RELEASED, mark.maximum(), ordinary));
         return true;
@@ -111,6 +140,12 @@ public final class SessionVitals implements AutoCloseable {
         }
     }
 
+    private static void restoreNutrition(Player player, OrdinaryVitals ordinary) {
+        player.setFoodLevel(ordinary.food());
+        player.setSaturation(ordinary.saturation());
+        player.setExhaustion(ordinary.exhaustion());
+    }
+
     private static void restoreScale(Player player, double maximum, OrdinaryVitals ordinary) {
         if (player.isHealthScaled() && player.getHealthScale() == maximum) {
             player.setHealthScale(ordinary.scale());

src/main/resources/config.yml

@@ -1,3 +1,163 @@
 # Captured when a new fantasy session starts; changing this does not alter active sessions.
 # Admin command: /fantasystick config adventure-mode [true|false]
 adventure-mode: true
+admin-revive-selection-timeout-seconds: 60
+
+# Real-time delay before this player may enter a different character after exit.
+character-swap-cooldown-seconds: 900
+roleplay-disabled: false
+party-max-size: 6
+sheet-resource-pack-url: ''
+sheet-resource-pack-sha1: ''
+
+# New-character and transferable fantasy progression defaults.
+starting-points: 40
+xp-per-level: 100
+maximum-level: 30
+
+# Character-bound combat rewards. Restricted hostile/neutral/boss history uses mob death positions.
+passive-xp: 1
+ordinary-xp: 10
+boss-xp: 100
+restricted-kill-spacing-blocks: 3
+
+# Fireball defaults from the reviewed starter catalogue.
+fireball-base-damage: 6
+fireball-cooldown-seconds: 4
+fireball-range-blocks: 32
+fireball-lifetime-seconds: 5
+
+# Great Sword defaults from the reviewed starter catalogue.
+great-sword-base-damage: 7
+great-sword-recovery-seconds: 1.2
+
+# Frost Shard defaults from the reviewed remaining-development packet.
+# Admin command: /fantasystick config <key> [value]
+frost-shard-base-damage: 4
+frost-shard-cooldown-seconds: 5
+frost-shard-range-blocks: 32
+frost-shard-lifetime-seconds: 5
+frost-shard-projectile-speed-blocks-per-tick: 1
+frost-shard-slowness-amplifier: 0
+frost-shard-slowness-duration-seconds: 2
+
+# Longbow defaults from the reviewed remaining-development packet.
+# Admin command: /fantasystick config <key> [value]
+longbow-base-damage: 5
+longbow-recovery-seconds: 1
+longbow-minimum-draw-ticks: 3
+longbow-full-draw-ticks: 20
+longbow-range-blocks: 64
+longbow-lifetime-seconds: 10
+longbow-full-projectile-speed-blocks-per-tick: 3
+
+# Quickstep defaults from the reviewed remaining-development packet.
+# Admin command: /fantasystick config <key> [value]
+quickstep-cooldown-seconds: 5
+quickstep-distance-blocks: 4
+quickstep-speed-blocks-per-tick: 1
+
+# Second Wind defaults from the reviewed remaining-development packet.
+# Admin command: /fantasystick config <key> [value]
+second-wind-base-healing: 6
+second-wind-cooldown-seconds: 15
+
+# Stone Skin defaults from the reviewed remaining-development packet.
+# Admin command: /fantasystick config <key> [value]
+stone-skin-cooldown-seconds: 14
+stone-skin-duration-seconds: 4
+stone-skin-damage-reduction-percent: 25
+
+# Shield Bash defaults from the reviewed remaining-development packet.
+# Admin command: /fantasystick config <key> [value]
+shield-bash-base-damage: 4
+shield-bash-cooldown-seconds: 6
+shield-bash-range-blocks: 3
+shield-bash-horizontal-knockback: 0.8
+shield-bash-minimum-vertical-knockback: 0.35
+
+# Hex defaults from the reviewed remaining-development packet.
+# Admin command: /fantasystick config <key> [value]
+hex-cooldown-seconds: 10
+hex-range-blocks: 12
+hex-duration-seconds: 4
+hex-damage-reduction-percent: 20
+
+# Inspire defaults from the reviewed remaining-development packet.
+# Admin command: /fantasystick config <key> [value]
+inspire-base-temporary-health: 4
+inspire-cooldown-seconds: 15
+inspire-range-blocks: 12
+inspire-duration-seconds: 6
+
+# Mending Light defaults from the reviewed remaining-development packet.
+# Admin command: /fantasystick config <key> [value]
+mending-light-base-healing: 6
+mending-light-cooldown-seconds: 8
+mending-light-range-blocks: 12
+
+# Purify defaults from the reviewed remaining-development packet.
+# Admin command: /fantasystick config <key> [value]
+purify-cooldown-seconds: 15
+purify-range-blocks: 12
+
+# Guardian Bond defaults from the reviewed remaining-development packet.
+# Admin command: /fantasystick config <key> [value]
+guardian-bond-cooldown-seconds: 20
+guardian-bond-range-blocks: 10
+guardian-bond-duration-seconds: 6
+guardian-bond-redirect-percent: 30
+
+# Rallying Cry defaults from the reviewed remaining-development packet.
+# Admin command: /fantasystick config <key> [value]
+rallying-cry-cooldown-seconds: 25
+rallying-cry-radius-blocks: 8
+rallying-cry-duration-seconds: 6
+rallying-cry-speed-amplifier: 0
+rallying-cry-damage-bonus-percent: 20
+
+# Frost Nova defaults from the reviewed remaining-development packet.
+# Admin command: /fantasystick config <key> [value]
+frost-nova-base-damage: 5
+frost-nova-cooldown-seconds: 12
+frost-nova-radius-blocks: 5
+frost-nova-slowness-amplifier: 1
+frost-nova-slowness-duration-seconds: 3
+
+# Chain Lightning defaults from the reviewed remaining-development packet.
+# Admin command: /fantasystick config <key> [value]
+chain-lightning-base-damage: 8
+chain-lightning-cooldown-seconds: 18
+chain-lightning-initial-range-blocks: 16
+chain-lightning-jump-range-blocks: 6
+chain-lightning-additional-targets: 3
+chain-lightning-jump-multiplier: 0.75
+
+# Sanctuary defaults from the reviewed remaining-development packet.
+# Admin command: /fantasystick config <key> [value]
+sanctuary-cooldown-seconds: 45
+sanctuary-radius-blocks: 6
+sanctuary-vertical-range-blocks: 3
+sanctuary-duration-seconds: 6
+sanctuary-pulse-interval-seconds: 1
+sanctuary-healing-per-pulse: 2
+sanctuary-damage-reduction-percent: 20
+
+# War Banner defaults from the reviewed remaining-development packet.
+# Admin command: /fantasystick config <key> [value]
+war-banner-cooldown-seconds: 45
+war-banner-placement-range-blocks: 12
+war-banner-radius-blocks: 8
+war-banner-vertical-range-blocks: 4
+war-banner-duration-seconds: 10
+war-banner-damage-bonus-percent: 25
+war-banner-knockback-resistance-percent: 50
+
+# Meteor defaults from the reviewed remaining-development packet.
+# Admin command: /fantasystick config <key> [value]
+meteor-base-damage: 14
+meteor-cooldown-seconds: 45
+meteor-target-range-blocks: 24
+meteor-warning-seconds: 2
+meteor-radius-blocks: 5
+meteor-vertical-range-blocks: 4

src/main/resources/plugin.yml

@@ -7,10 +7,10 @@ description: Transferable characters, native fantasy health, recoverable equipme
 author: dmg.games
 commands:
   fantasystick:
-    description: Inspect/recover equipment sessions or configure fantasy mode.
-    usage: /fantasystick <inspect|recover> <player-uuid> | config adventure-mode [true|false]
+    description: Issue or revive sheets, grant fantasy experience, recover sessions or configure Fantasy Stick.
+    usage: /fantasystick <give|revive> <online-player> | experience give <active-character-name...> <amount> | <inspect|recover> <player-uuid> | config <setting> [value]
     permission: fantasystick.admin
 permissions:
   fantasystick.admin:
-    description: Inspect/recover equipment sessions and configure fantasy mode.
+    description: Issue/revive sheets, grant fantasy experience, recover sessions and configure fantasy mode.
     default: op

src/nativeTest/java/games/dmg/fantasystick/AbilityEngineNativeTest.java

@@ -0,0 +1,229 @@
+package games.dmg.fantasystick;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import games.dmg.fantasystick.ability.AbilityDefinition;
+import games.dmg.fantasystick.ability.AbilityRegistry;
+import games.dmg.fantasystick.persistence.CharacterStorage;
+import games.dmg.fantasystick.session.ControlInput;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.nio.file.Path;
+import java.time.Duration;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicInteger;
+import org.bukkit.Material;
+import org.bukkit.event.block.Action;
+import org.bukkit.inventory.EquipmentSlot;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+class AbilityEngineNativeTest {
+    @TempDir Path data;
+    @BeforeAll static void bootstrap() throws Exception { NativeRuntime.bootstrap(); }
+
+    @Test void executionContractsRevalidateTargetsBoundAreasReportOnlyEffectsAndCleanOwnedWork() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var registry = new AbilityRegistry();
+            var reports = new java.util.ArrayList<games.dmg.fantasystick.ability.AbilityReport>();
+            var delayed = new java.util.ArrayList<Runnable>();
+            var closedResources = new AtomicInteger();
+            var delayedEffects = new AtomicInteger();
+            var selectionEffects = new AtomicInteger();
+            var allyEffects = new AtomicInteger();
+            var exceptionalEffects = new AtomicInteger();
+            var areaRecipients = new java.util.ArrayList<org.bukkit.entity.Entity>();
+            var areaCandidates = new java.util.concurrent.atomic.AtomicReference<List<? extends org.bukkit.entity.Entity>>(List.of());
+            registry.register(definition("report_test", AbilityDefinition.Activation.IMMEDIATE,
+                AbilityDefinition.TargetPolicy.HOSTILE, execution -> {
+                    for (var type : games.dmg.fantasystick.ability.AbilityReport.Type.values()) {
+                        execution.report(type, execution.input().target(), BigDecimal.valueOf(2));
+                    }
+                }));
+            registry.register(definition("area_test", AbilityDefinition.Activation.IMMEDIATE,
+                AbilityDefinition.TargetPolicy.AREA, execution -> areaRecipients.addAll(execution.eligible(areaCandidates.get(), 2))));
+            registry.register(definition("delayed_test", AbilityDefinition.Activation.DELAYED,
+                AbilityDefinition.TargetPolicy.PARTY, execution -> execution.later(Duration.ofSeconds(1), () -> {
+                    delayedEffects.incrementAndGet(); execution.finish();
+                })));
+            registry.register(definition("selection_test", AbilityDefinition.Activation.SELECTION,
+                AbilityDefinition.TargetPolicy.SELECTION, execution -> execution.later(Duration.ofSeconds(1), () -> {
+                    selectionEffects.incrementAndGet(); execution.finish();
+                })));
+            registry.register(definition("projectile_test", AbilityDefinition.Activation.PROJECTILE,
+                AbilityDefinition.TargetPolicy.HOSTILE, execution -> execution.own(closedResources::incrementAndGet)));
+            registry.register(definition("ally_test", AbilityDefinition.Activation.IMMEDIATE,
+                AbilityDefinition.TargetPolicy.ALLY, execution -> allyEffects.incrementAndGet()));
+            registry.register(definition("exception_test", AbilityDefinition.Activation.IMMEDIATE,
+                AbilityDefinition.TargetPolicy.EXCEPTIONAL_NONCOMBAT, execution -> exceptionalEffects.incrementAndGet()));
+
+            var a = new FantasyStickLifecycleNativeTest.Actor(data);
+            var b = new FantasyStickLifecycleNativeTest.Actor(data);
+            f.players.put(a.core.id, a.player); f.players.put(b.core.id, b.player);
+            prepare(data, a, List.of("report_test", "area_test", "delayed_test", "selection_test", "projectile_test", "ally_test", "exception_test"));
+            f.activate(a); f.activate(b);
+            var sessions = (games.dmg.fantasystick.session.EquipmentSessions)
+                FantasyStickLifecycleNativeTest.Fixture.field(f.plugin, "sessions");
+            var parties = PartyLifecycleNativeTest.parties(f);
+            var party = parties.create(a.core.id).orElseThrow();
+            assertTrue(parties.accept(b.core.id, parties.invite(a.core.id, party.id(), b.core.id).orElseThrow().id()));
+            games.dmg.fantasystick.ability.AbilityScheduler scheduler = (delay, action) -> {
+                delayed.add(action); return closedResources::incrementAndGet;
+            };
+            var engine = new games.dmg.fantasystick.ability.AbilityEngine(registry,
+                (CharacterStorage) FantasyStickLifecycleNativeTest.Fixture.field(f.plugin, "characters"), sessions, parties,
+                java.time.Clock.fixed(java.time.Instant.parse("2026-09-19T20:00:00Z"), java.time.ZoneOffset.UTC),
+                f.tasks::add, scheduler, reports::add, failure -> fail(failure.toString()));
+            var active = sessions.active(a.core.id).orElseThrow();
+            var hostile = org.mockito.Mockito.mock(org.bukkit.entity.LivingEntity.class);
+            org.mockito.Mockito.when(hostile.getUniqueId()).thenReturn(java.util.UUID.randomUUID());
+            cast(engine, f, a, active, 2, "report_test", hostile);
+            assertEquals(java.util.Set.copyOf(java.util.Arrays.asList(games.dmg.fantasystick.ability.AbilityReport.Type.values())),
+                reports.stream().map(games.dmg.fantasystick.ability.AbilityReport::type).collect(java.util.stream.Collectors.toSet()));
+            assertEquals(5, reports.size());
+            assertEquals(a.core.record.id(), reports.getFirst().sourceCharacter());
+
+            var ordinary = org.mockito.Mockito.mock(org.bukkit.entity.Player.class);
+            org.mockito.Mockito.when(ordinary.getUniqueId()).thenReturn(java.util.UUID.randomUUID());
+            areaCandidates.set(List.of(hostile, ordinary, b.player));
+            active = sessions.active(a.core.id).orElseThrow();
+            cast(engine, f, a, active, 3, "area_test", null);
+            assertEquals(List.of(hostile, b.player), areaRecipients);
+            assertEquals(5, reports.size(), "Casting and no-op/recipient discovery do not manufacture reports");
+
+            active = sessions.active(a.core.id).orElseThrow();
+            cast(engine, f, a, active, 7, "ally_test", b.player);
+            assertEquals(1, allyEffects.get());
+            active = sessions.active(a.core.id).orElseThrow();
+            cast(engine, f, a, active, 8, "exception_test", ordinary);
+            assertEquals(1, exceptionalEffects.get(), "Explicit non-combat policy may select an ordinary player");
+
+            active = sessions.active(a.core.id).orElseThrow();
+            cast(engine, f, a, active, 4, "delayed_test", b.player);
+            assertEquals(1, delayed.size());
+            assertTrue(parties.leave(a.core.id, party.id()));
+            delayed.removeFirst().run();
+            assertEquals(0, delayedEffects.get(), "Party eligibility is rechecked at delayed application");
+
+            active = sessions.active(a.core.id).orElseThrow();
+            cast(engine, f, a, active, 5, "selection_test", b.player);
+            assertEquals(1, delayed.size());
+            engine.remove(a.core.record.id(), "selection_test");
+            delayed.removeFirst().run();
+            assertEquals(0, selectionEffects.get(), "Removal invalidates pending selection callbacks without clearing cooldowns");
+            var stored = ((CharacterStorage) FantasyStickLifecycleNativeTest.Fixture.field(f.plugin, "characters"))
+                .find(a.core.record.id()).get().orElseThrow();
+            assertTrue(stored.cooldowns().containsKey("selection_test"));
+
+            active = sessions.active(a.core.id).orElseThrow();
+            cast(engine, f, a, active, 6, "projectile_test", hostile);
+            int beforeExit = closedResources.get();
+            PartyCombatNativeTest.exit(f, a);
+            engine.sweep();
+            assertEquals(beforeExit + 1, closedResources.get(), "Session end cleans the projectile definition's owned resource");
+            engine.close();
+            assertEquals(beforeExit + 1, closedResources.get(), "Repeated engine cleanup cannot close owned state twice");
+        }
+    }
+
+    @Test void registeredTestDefinitionUsesRealBookPersistenceControlAndCastRoutes() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var registry = (AbilityRegistry) FantasyStickLifecycleNativeTest.Fixture.field(f.plugin, "abilityRegistry");
+            var effects = new AtomicInteger();
+            registry.register(new AbilityDefinition("test_focus", "Test Focus", Material.AMETHYST_SHARD,
+                List.of("A registered test effect"), "Use the equipped shard", Map.of(), BigInteger.ONE,
+                AbilityDefinition.Activation.IMMEDIATE, ControlInput.Gesture.USE, Duration.ofSeconds(4),
+                Map.of("range", BigDecimal.valueOf(12)), AbilityDefinition.TargetPolicy.SELF,
+                execution -> { assertTrue(execution.stillCurrent()); effects.incrementAndGet(); }));
+            var a = new FantasyStickLifecycleNativeTest.Actor(data); f.players.put(a.core.id, a.player); f.activate(a);
+            a.core.inventory.getInventory().setSelectedSlot(0);
+
+            PartyBookNativeTest.open(f, a);
+            String available = PartyBookNativeTest.text(a);
+            String compactAvailable = available.replaceAll("\\s+", "");
+            assertTrue(compactAvailable.contains("TestFocus"), available);
+            assertFalse(compactAvailable.contains("Icon:"), available);
+            assertFalse(compactAvailable.contains("Cost:"), available);
+            assertTrue(compactAvailable.contains("Cooldown:4s"), available);
+            var learn = PartyBookNativeTest.button(a, "[Learn]");
+            PartyBookNativeTest.click(f, a, learn); PartyBookNativeTest.click(f, a, learn);
+            PartyBookNativeTest.drain(f); PartyBookNativeTest.drain(f);
+            var storage = (CharacterStorage) FantasyStickLifecycleNativeTest.Fixture.field(f.plugin, "characters");
+            var learned = storage.find(a.core.record.id()).get().orElseThrow();
+            assertEquals(java.util.Set.of("test_focus"), learned.learned());
+            assertEquals(BigInteger.valueOf(39), learned.unspentPoints(), "Repeated stale book action cannot spend twice");
+
+            assertEquals("test_focus", learned.loadout().getFirst());
+            var control = a.core.inventory.getItem(2);
+            assertEquals(Material.AMETHYST_SHARD, control.getType());
+            assertEquals("test_focus", new games.dmg.fantasystick.items.SessionControls(registry).ability(control).orElseThrow());
+
+            a.core.inventory.getInventory().setSelectedSlot(2);
+            var cast = new org.bukkit.event.player.PlayerInteractEvent(a.player, Action.RIGHT_CLICK_AIR, control,
+                null, org.bukkit.block.BlockFace.SELF, EquipmentSlot.HAND);
+            f.dispatcher.accept(cast); PartyBookNativeTest.drain(f); PartyBookNativeTest.drain(f);
+            assertEquals(org.bukkit.event.Event.Result.DENY, cast.useItemInHand());
+            assertEquals(1, effects.get());
+            var cooled = storage.find(a.core.record.id()).get().orElseThrow();
+            assertTrue(cooled.cooldowns().get("test_focus").isAfter(java.time.Instant.now()));
+            var cooling = a.core.inventory.getItem(2);
+            assertEquals(Material.GRAY_STAINED_GLASS_PANE, cooling.getType());
+            assertEquals(net.kyori.adventure.text.Component.text("Test Focus — Cooling Down"), cooling.getItemMeta().displayName());
+            assertEquals("test_focus", new games.dmg.fantasystick.items.SessionControls(registry).ability(cooling).orElseThrow());
+
+            var repeated = new org.bukkit.event.player.PlayerInteractEvent(a.player, Action.RIGHT_CLICK_AIR,
+                cooling, null, org.bukkit.block.BlockFace.SELF, EquipmentSlot.HAND);
+            f.dispatcher.accept(repeated);
+            assertEquals(org.bukkit.event.Event.Result.DENY, repeated.useItemInHand(), "The pane remains a contained control");
+            PartyBookNativeTest.drain(f);
+            assertEquals(1, effects.get(), "The persisted character deadline refuses an immediate repeated cast");
+            assertTrue(a.messages.stream().anyMatch(message -> message.contains("ready in")));
+
+            var sheet = a.core.inventory.getItemInOffHand().clone();
+            a.core.inventory.setItemInOffHand(null); f.changed(a);
+            PartyBookNativeTest.drain(f); f.awaitCharacterAndReceipt(a);
+            a.core.inventory.setItemInOffHand(sheet); f.activate(a);
+            a.core.inventory.getInventory().setSelectedSlot(2);
+            assertEquals(Material.GRAY_STAINED_GLASS_PANE, a.core.inventory.getItem(2).getType());
+            assertEquals("test_focus", new games.dmg.fantasystick.items.SessionControls(registry)
+                .ability(a.core.inventory.getItem(2)).orElseThrow());
+            f.dispatcher.accept(new org.bukkit.event.player.PlayerInteractEvent(a.player, Action.RIGHT_CLICK_AIR,
+                a.core.inventory.getItem(2), null, org.bukkit.block.BlockFace.SELF, EquipmentSlot.HAND));
+            PartyBookNativeTest.drain(f);
+            assertEquals(1, effects.get(), "Exit/resume cannot reset the persisted character cooldown");
+            assertEquals(cooled.cooldowns(), storage.find(a.core.record.id()).get().orElseThrow().cooldowns());
+        }
+    }
+
+    private static AbilityDefinition definition(String id, AbilityDefinition.Activation activation,
+            AbilityDefinition.TargetPolicy targetPolicy, games.dmg.fantasystick.ability.AbilityEffect effect) {
+        return new AbilityDefinition(id, id, Material.AMETHYST_SHARD, List.of("Test definition"), "Use test input",
+            Map.of(), BigInteger.ONE, activation, ControlInput.Gesture.USE, Duration.ZERO,
+            Map.of(), targetPolicy, effect);
+    }
+
+    private static void prepare(Path data, FantasyStickLifecycleNativeTest.Actor actor, List<String> loadout) throws Exception {
+        var repository = new games.dmg.fantasystick.persistence.YamlCharacterRepository(data);
+        var old = repository.load(actor.core.record.id()).orElseThrow();
+        var learned = loadout.stream().filter(id -> !id.isEmpty()).collect(java.util.stream.Collectors.toSet());
+        var saved = new games.dmg.fantasystick.persistence.CharacterRecord(old.id(), old.name(), old.revision().add(BigInteger.ONE),
+            old.stats(), old.level(), old.experience(), old.unspentPoints(), old.health(), learned, loadout,
+            old.cooldowns(), old.restrictedKills(), false, null, null);
+        repository.replace(saved, old.revision());
+    }
+
+    private static void cast(games.dmg.fantasystick.ability.AbilityEngine engine,
+            FantasyStickLifecycleNativeTest.Fixture fixture, FantasyStickLifecycleNativeTest.Actor actor,
+            games.dmg.fantasystick.session.EquipmentSessions.Active active, int slot, String id,
+            org.bukkit.entity.Entity target) throws Exception {
+        var sessions = (games.dmg.fantasystick.session.EquipmentSessions)
+            FantasyStickLifecycleNativeTest.Fixture.field(fixture.plugin, "sessions");
+        engine.accept(new ControlInput(actor.player, active, slot, id, ControlInput.Kind.ABILITY,
+            ControlInput.Gesture.USE, target, 0, 0, () -> sessions.current(active)));
+        PartyBookNativeTest.drain(fixture);
+    }
+}

src/nativeTest/java/games/dmg/fantasystick/AbilityRegistryNativeTest.java

@@ -0,0 +1,90 @@
+package games.dmg.fantasystick;
+
+import games.dmg.fantasystick.ability.AbilityDefinition;
+import games.dmg.fantasystick.ability.AbilityRegistry;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.util.List;
+import java.util.Map;
+import org.bukkit.Material;
+import org.junit.jupiter.api.Test;
+
+class AbilityRegistryNativeTest {
+    @org.junit.jupiter.api.BeforeAll static void bootstrap() throws Exception {
+        games.dmg.fantasystick.NativeRuntime.bootstrap();
+    }
+    @Test void registersCompleteStableDefinitionsAndRejectsDuplicateIds() {
+        var registry = new AbilityRegistry();
+        var definition = definition("test_bolt");
+        registry.register(definition);
+        assertSame(definition, registry.find("test_bolt").orElseThrow());
+        assertEquals(List.of(definition), registry.definitions());
+        assertThrows(IllegalArgumentException.class, () -> registry.register(definition("test_bolt")));
+        assertTrue(registry.find("unknown_saved_id").isEmpty());
+        assertTrue(registry.find("basic_attack").isEmpty(), "The built-in stick is not a learned/refundable definition");
+    }
+
+    @Test void rejectsMalformedMetadataRequirementsAndNumericParametersBeforeRegistration() {
+        var valid = definition("valid");
+        assertAll(
+            () -> assertThrows(IllegalArgumentException.class, () -> copy(valid, "UPPER", valid.requirements(), valid.parameters(), valid.cooldown())),
+            () -> assertThrows(IllegalArgumentException.class, () -> copy(valid, "", valid.requirements(), valid.parameters(), valid.cooldown())),
+            () -> assertThrows(IllegalArgumentException.class, () -> new AbilityDefinition("x", " ", Material.STONE,
+                List.of("Lore"), "Use", Map.of(Stat.INT, BigInteger.TEN), BigInteger.ONE,
+                AbilityDefinition.Activation.IMMEDIATE, ControlInput.Gesture.USE, Duration.ZERO,
+                Map.of(), AbilityDefinition.TargetPolicy.HOSTILE, ignored -> {})),
+            () -> assertThrows(IllegalArgumentException.class, () -> copy(valid, "low", Map.of(Stat.INT, BigInteger.valueOf(9)), Map.of(), Duration.ZERO)),
+            () -> assertThrows(IllegalArgumentException.class, () -> copy(valid, "negative", valid.requirements(), Map.of("range", BigDecimal.valueOf(-1)), Duration.ZERO)),
+            () -> assertThrows(IllegalArgumentException.class, () -> copy(valid, "infinite", valid.requirements(), Map.of("range", new BigDecimal("1E1000000")), Duration.ZERO)),
+            () -> assertThrows(IllegalArgumentException.class, () -> copy(valid, "cooldown", valid.requirements(), Map.of(), Duration.ofSeconds(-1))),
+            () -> assertThrows(IllegalArgumentException.class, () -> copy(valid, "long_cooldown", valid.requirements(), Map.of(), Duration.ofDays(366))),
+            () -> assertThrows(IllegalArgumentException.class, () -> new AbilityDefinition("air", "Air", Material.AIR,
+                List.of("Lore"), "Use", Map.of(), BigInteger.ONE, AbilityDefinition.Activation.IMMEDIATE,
+                ControlInput.Gesture.USE, Duration.ZERO, Map.of(), AbilityDefinition.TargetPolicy.SELF, ignored -> {}))
+        );
+    }
+
+    @Test void effectReportsRequireActualPositiveFiniteEvidence() {
+        var character = java.util.UUID.randomUUID(); var session = java.util.UUID.randomUUID(); var target = java.util.UUID.randomUUID();
+        var now = java.time.Instant.parse("2026-09-19T20:00:00Z");
+        for (var type : games.dmg.fantasystick.ability.AbilityReport.Type.values()) {
+            assertDoesNotThrow(() -> new games.dmg.fantasystick.ability.AbilityReport(type, character, session, target,
+                BigDecimal.ONE, now));
+            assertThrows(IllegalArgumentException.class, () -> new games.dmg.fantasystick.ability.AbilityReport(type,
+                character, session, target, BigDecimal.ZERO, now));
+            assertThrows(IllegalArgumentException.class, () -> new games.dmg.fantasystick.ability.AbilityReport(type,
+                character, session, target, new BigDecimal("1E1000000"), now));
+        }
+    }
+
+    @Test void definitionsSupportEveryBoundedExecutionStyleAndTargetBoundary() {
+        for (var activation : AbilityDefinition.Activation.values()) {
+            for (var policy : AbilityDefinition.TargetPolicy.values()) {
+                var base = definition("x");
+                assertDoesNotThrow(() -> new AbilityDefinition("a_" + activation.name().toLowerCase() + "_" + policy.name().toLowerCase(),
+                    base.name(), base.icon(), base.lore(), base.instructions(), base.requirements(), base.pointCost(), activation,
+                    base.gesture(), base.cooldown(), base.parameters(), policy, base.effect()));
+            }
+        }
+    }
+
+    static AbilityDefinition definition(String id) {
+        return new AbilityDefinition(id, "Test Bolt", Material.AMETHYST_SHARD, List.of("A focused test effect"),
+            "Use the equipped control", Map.of(Stat.INT, BigInteger.valueOf(12)), BigInteger.ONE,
+            AbilityDefinition.Activation.PROJECTILE, ControlInput.Gesture.USE, Duration.ofSeconds(4),
+            Map.of("range", BigDecimal.valueOf(12), "duration", BigDecimal.valueOf(5)),
+            AbilityDefinition.TargetPolicy.HOSTILE, ignored -> {});
+    }
+
+    private static AbilityDefinition copy(AbilityDefinition value, String id, Map<Stat, BigInteger> requirements,
+                                          Map<String, BigDecimal> parameters, Duration cooldown) {
+        return new AbilityDefinition(id, value.name(), value.icon(), value.lore(), value.instructions(), requirements,
+            value.pointCost(), value.activation(), value.gesture(), cooldown, parameters, value.targetPolicy(), value.effect());
+    }
+}

src/nativeTest/java/games/dmg/fantasystick/AdminExperienceGrantNativeTest.java

@@ -0,0 +1,73 @@
+package games.dmg.fantasystick;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+import games.dmg.fantasystick.crafting.CharacterFactory;
+import games.dmg.fantasystick.persistence.CharacterRecord;
+import games.dmg.fantasystick.persistence.CharacterStorage;
+import games.dmg.fantasystick.progression.ProgressionRules;
+import games.dmg.fantasystick.session.AdminExperienceGrant;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.atomic.AtomicBoolean;
+import org.junit.jupiter.api.Test;
+
+class AdminExperienceGrantNativeTest {
+    @Test void acceptedPersistenceCannotRedirectFeedbackAfterCharacterSwitch() {
+        var storage = mock(CharacterStorage.class); var sessions = mock(EquipmentSessions.class);
+        var rules = ProgressionRules.defaults(); CharacterRecord captured = new CharacterFactory().create(rules);
+        var active = new EquipmentSessions.Active(UUID.randomUUID(), UUID.randomUUID(), captured.id());
+        var current = new AtomicBoolean(true);
+        when(sessions.current(active)).thenAnswer(call -> current.get());
+        when(sessions.currentRecord(active)).thenReturn(Optional.of(captured));
+        var future = new CompletableFuture<CharacterStorage.ExperienceAward>();
+        when(storage.awardExperience(captured.id(), captured.revision(), BigInteger.TEN, rules)).thenReturn(future);
+        var tasks = new ArrayList<Runnable>(); var results = new ArrayList<AdminExperienceGrant.Result>();
+        var playerLookups = new java.util.concurrent.atomic.AtomicInteger();
+        var grant = new AdminExperienceGrant(storage, rules, sessions, tasks::add,
+            ignored -> { playerLookups.incrementAndGet(); return null; }, failure -> fail(failure.cause()));
+
+        assertTrue(grant.grant(active, captured, BigInteger.TEN, results::add));
+        current.set(false);
+        var saved = new CharacterRecord(captured.id(), captured.name(), BigInteger.ONE, captured.stats(), 1,
+            BigInteger.TEN, captured.unspentPoints(), captured.health(), captured.learned(), captured.loadout(),
+            captured.cooldowns(), captured.restrictedKills(), false, captured.deathId(), captured.diedAt());
+        future.complete(new CharacterStorage.ExperienceAward(CharacterStorage.ExperienceAwardStatus.APPLIED,
+            Optional.of(saved), 0));
+        assertEquals(1, tasks.size()); tasks.getFirst().run();
+
+        assertEquals(AdminExperienceGrant.Status.APPLIED, results.getFirst().status());
+        assertEquals(BigInteger.TEN, results.getFirst().applied());
+        verify(sessions, never()).acknowledgeProgress(any(), any(), any());
+        assertEquals(0, playerLookups.get(), "A replacement holder/session cannot receive captured feedback");
+    }
+
+    @Test void persistenceFailureReportsOnceAndClosedLifetimePublishesNoStaleCallback() {
+        var storage = mock(CharacterStorage.class); var sessions = mock(EquipmentSessions.class);
+        var rules = ProgressionRules.defaults(); CharacterRecord captured = new CharacterFactory().create(rules);
+        var active = new EquipmentSessions.Active(UUID.randomUUID(), UUID.randomUUID(), captured.id());
+        when(sessions.current(active)).thenReturn(true); when(sessions.currentRecord(active)).thenReturn(Optional.of(captured));
+        var failed = new CompletableFuture<CharacterStorage.ExperienceAward>();
+        when(storage.awardExperience(captured.id(), captured.revision(), BigInteger.ONE, rules)).thenReturn(failed);
+        var tasks = new ArrayList<Runnable>(); var results = new ArrayList<AdminExperienceGrant.Result>();
+        var failures = new ArrayList<AdminExperienceGrant.Failure>();
+        var grant = new AdminExperienceGrant(storage, rules, sessions, tasks::add, ignored -> null, failures::add);
+        assertTrue(grant.grant(active, captured, BigInteger.ONE, results::add));
+        failed.completeExceptionally(new java.io.IOException("save failed"));
+        assertEquals(1, failures.size()); assertEquals(1, tasks.size()); tasks.removeFirst().run();
+        assertEquals(List.of(AdminExperienceGrant.Status.FAILED), results.stream().map(AdminExperienceGrant.Result::status).toList());
+
+        var pending = new CompletableFuture<CharacterStorage.ExperienceAward>();
+        when(storage.awardExperience(captured.id(), captured.revision(), BigInteger.TWO, rules)).thenReturn(pending);
+        assertTrue(grant.grant(active, captured, BigInteger.TWO, results::add)); grant.close();
+        pending.complete(new CharacterStorage.ExperienceAward(CharacterStorage.ExperienceAwardStatus.AT_CAP,
+            Optional.of(captured), 0));
+        assertTrue(tasks.isEmpty()); assertEquals(1, results.size());
+    }
+}

src/nativeTest/java/games/dmg/fantasystick/AdminExperienceNativeTest.java

@@ -0,0 +1,212 @@
+package games.dmg.fantasystick;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import games.dmg.fantasystick.items.CharacterSheets;
+import games.dmg.fantasystick.persistence.CharacterRecord;
+import games.dmg.fantasystick.persistence.CharacterStorage;
+import java.math.BigInteger;
+import java.nio.file.Path;
+import java.util.List;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+class AdminExperienceNativeTest {
+    @TempDir Path data;
+    @BeforeAll static void bootstrap() throws Exception { NativeRuntime.bootstrap(); }
+
+    @Test void registeredCommandResolvesExactActiveCharacterPersistsThenSynchronizesFeedbackAndBook() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var target = new FantasyStickLifecycleNativeTest.Actor(data);
+            var storage = storage(f);
+            storage.renameCharacter(target.core.record.id(), "Mira 雪").get();
+            f.players.put(target.core.id, target.player); f.activate(target);
+            var sender = new EquipmentAdminCommandNativeTest.Sender();
+            var before = storage.find(target.core.record.id()).get().orElseThrow();
+
+            assertEquals(List.of("experience"), f.command.tabComplete(sender.port, "fantasystick", new String[]{"exp"}));
+            assertEquals(List.of("give"), f.command.tabComplete(sender.port, "fantasystick", new String[]{"experience", "g"}));
+            assertEquals(List.of("Mira"), f.command.tabComplete(sender.port, "fantasystick", new String[]{"experience", "give", "Mi"}));
+            assertEquals(List.of("雪"), f.command.tabComplete(sender.port, "fantasystick", new String[]{"experience", "give", "Mira", ""}));
+            assertTrue(f.command.tabComplete(sender.port, "fantasystick", new String[]{"experience", "give", "Mira", "雪", ""}).isEmpty());
+            assertTrue(f.command.execute(sender.port, "fantasystick", new String[]{"experience", "give", "Mira", "雪", "250"}));
+            storage.find(target.core.record.id()).get(); f.tick();
+
+            var saved = storage.find(target.core.record.id()).get().orElseThrow();
+            assertEquals(BigInteger.valueOf(250), saved.experience());
+            assertEquals(3, saved.level());
+            assertEquals(before.unspentPoints().add(BigInteger.TWO), saved.unspentPoints());
+            assertEquals(before.stats(), saved.stats()); assertEquals(before.health(), saved.health());
+            assertEquals(before.learned(), saved.learned()); assertEquals(before.loadout(), saved.loadout());
+            assertEquals(before.cooldowns(), saved.cooldowns()); assertEquals(before.restrictedKills(), saved.restrictedKills());
+            assertTrue(sender.messages.getLast().contains("Mira 雪"));
+            assertTrue(sender.messages.getLast().contains("250")); assertTrue(sender.messages.getLast().contains("level 3"));
+            assertTrue(target.messages.stream().anyMatch(message -> message.contains("250 fantasy XP")));
+            assertTrue(target.messages.stream().anyMatch(message -> message.contains("Level 2")));
+            assertTrue(target.messages.stream().anyMatch(message -> message.contains("Level 3")));
+            assertEquals(2, target.sounds.size());
+            assertEquals(2, org.mockito.Mockito.mockingDetails(target.world).getInvocations().stream()
+                .filter(invocation -> invocation.getMethod().getName().equals("spawnParticle")).count());
+            PartyBookNativeTest.open(f, target);
+            String text = bookText(target.books.getLast());
+            assertTrue(text.contains("Level: 3"), text); assertTrue(text.contains("XP: 50/100"), text);
+
+            f.plugin.setEnabled(false); f.plugin.setEnabled(true);
+            assertEquals(BigInteger.valueOf(250), storage(f).find(target.core.record.id()).get().orElseThrow().experience());
+        }
+    }
+
+    @Test void commandValidationAmbiguityExactCaseAndAutocompleteFailClosedWithoutMutation() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var first = active(f, data, "Twin Hero"); var second = active(f, data, "Twin Hero");
+            var unicode = active(f, data, "Árvíztűrő Tükörfúrógép");
+            var inactive = new FantasyStickLifecycleNativeTest.Actor(data);
+            storage(f).renameCharacter(inactive.core.record.id(), "Hidden Hero").get();
+            var sender = new EquipmentAdminCommandNativeTest.Sender();
+            var firstBefore = storage(f).find(first.core.record.id()).get().orElseThrow();
+            var secondBefore = storage(f).find(second.core.record.id()).get().orElseThrow();
+
+            assertEquals(List.of("Twin"), f.command.tabComplete(sender.port, "fantasystick", new String[]{"experience", "give", "Tw"}));
+            assertEquals(List.of("Hero"), f.command.tabComplete(sender.port, "fantasystick", new String[]{"experience", "give", "Twin", "H"}));
+            assertEquals(List.of("Árvíztűrő"), f.command.tabComplete(sender.port, "fantasystick", new String[]{"experience", "give", "Á"}));
+            assertEquals(List.of("Tükörfúrógép"), f.command.tabComplete(sender.port, "fantasystick", new String[]{"experience", "give", "Árvíztűrő", "T"}));
+            assertTrue(f.command.tabComplete(sender.port, "fantasystick", new String[]{"experience", "give", "Hidden", ""}).isEmpty());
+            int queued = f.tasks.size();
+            for (var args : List.of(
+                    new String[]{"experience", "give", "Twin", "Hero", "5"},
+                    new String[]{"experience", "give", "twin", "Hero", "5"},
+                    new String[]{"experience", "give", "Missing", "5"},
+                    new String[]{"experience", "give", "Hidden", "Hero", "5"},
+                    new String[]{"experience", "give", "Account", "5"},
+                    new String[]{"experience", "give", "Árvíztűrő", "Tükörfúrógép", "0"},
+                    new String[]{"experience", "give", "Árvíztűrő", "Tükörfúrógép", "-1"},
+                    new String[]{"experience", "give", "Árvíztűrő", "Tükörfúrógép", "1.5"},
+                    new String[]{"experience", "give", "Árvíztűrő", "Tükörfúrógép", "5", "extra"},
+                    new String[]{"experience", "give", "Árvíztűrő", "Tükörfúrógép"},
+                    new String[]{"experience", "extra", "Árvíztűrő", "Tükörfúrógép", "5"})) {
+                f.command.execute(sender.port, "fantasystick", args);
+            }
+            assertEquals(queued, f.tasks.size());
+            assertEquals(firstBefore, storage(f).find(first.core.record.id()).get().orElseThrow());
+            assertEquals(secondBefore, storage(f).find(second.core.record.id()).get().orElseThrow());
+            assertTrue(sender.messages.stream().anyMatch(message -> message.contains("ambiguous") && message.contains("Twin Hero")));
+            assertTrue(sender.messages.stream().anyMatch(message -> message.contains("not active") && message.contains("Missing")));
+            sender.allowed = false;
+            assertTrue(f.command.tabComplete(sender.port, "fantasystick", new String[]{"exp"}).isEmpty());
+            f.command.execute(sender.port, "fantasystick", new String[]{"experience", "give", "Árvíztűrő", "Tükörfúrógép", "5"});
+            assertTrue(sender.messages.getLast().contains("Permission denied"));
+            assertEquals(BigInteger.ZERO, storage(f).find(unicode.core.record.id()).get().orElseThrow().experience());
+        }
+    }
+
+    @Test void arbitraryPrecisionGrantClampsAtCapPreservesCombatHistoryAndNeverTouchesNativeXp() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var target = new FantasyStickLifecycleNativeTest.Actor(data); var storage = storage(f);
+            var position = new games.dmg.fantasystick.progression.CombatRewardRules.KillPosition(java.util.UUID.randomUUID(),
+                java.math.BigDecimal.ONE, java.math.BigDecimal.TWO, java.math.BigDecimal.TEN);
+            var progressed = storage.awardCombatExperience(target.core.record.id(), target.core.record.revision(), BigInteger.TEN,
+                new games.dmg.fantasystick.progression.ProgressionRules(BigInteger.valueOf(40), BigInteger.valueOf(100), 30),
+                games.dmg.fantasystick.progression.CombatRewardRules.defaults(), position).get().record().orElseThrow();
+            storage.renameCharacter(target.core.record.id(), "Cap Hero").get();
+            f.players.put(target.core.id, target.player); f.activate(target);
+            var sender = new EquipmentAdminCommandNativeTest.Sender(); String huge = "9".repeat(1000);
+
+            f.command.execute(sender.port, "fantasystick", new String[]{"experience", "give", "Cap", "Hero", huge});
+            storage.find(target.core.record.id()).get(); f.tick();
+            var capped = storage.find(target.core.record.id()).get().orElseThrow();
+            assertEquals(30, capped.level()); assertEquals(BigInteger.valueOf(2900), capped.experience());
+            assertEquals(progressed.restrictedKills(), capped.restrictedKills());
+            assertTrue(sender.messages.getLast().contains("applied 2890"));
+            int feedback = target.messages.size(); int sounds = target.sounds.size();
+            f.command.execute(sender.port, "fantasystick", new String[]{"experience", "give", "Cap", "Hero", "1"});
+            storage.find(target.core.record.id()).get(); f.tick();
+            assertTrue(sender.messages.getLast().contains("Granted 0"));
+            assertEquals(feedback, target.messages.size()); assertEquals(sounds, target.sounds.size());
+            assertEquals(capped, storage.find(target.core.record.id()).get().orElseThrow());
+        }
+    }
+
+    @Test void revisionLogoutFailureAndRepeatedGrantRacesNeverRedirectDuplicateOrClaimFalseSuccess() throws Exception {
+        var staleDir = data.resolve("stale");
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(staleDir)) {
+            f.plugin.setEnabled(true); var target = active(f, staleDir, "Before Rename"); var storage = storage(f);
+            var worker = (java.util.concurrent.ExecutorService) FantasyStickLifecycleNativeTest.Fixture.field(storage, "worker");
+            var entered = new java.util.concurrent.CountDownLatch(1); var release = new java.util.concurrent.CountDownLatch(1);
+            var gate = worker.submit(() -> { entered.countDown(); try { assertTrue(release.await(5, java.util.concurrent.TimeUnit.SECONDS)); }
+                catch (InterruptedException interrupted) { throw new AssertionError(interrupted); } });
+            var sender = new EquipmentAdminCommandNativeTest.Sender(); assertTrue(entered.await(5, java.util.concurrent.TimeUnit.SECONDS));
+            f.command.execute(sender.port, "fantasystick", new String[]{"experience", "give", "Before", "Rename", "75"});
+            var old = new games.dmg.fantasystick.persistence.YamlCharacterRepository(staleDir).load(target.core.record.id()).orElseThrow();
+            var renamed = copy(old, "After Rename", old.revision().add(BigInteger.ONE));
+            new games.dmg.fantasystick.persistence.YamlCharacterRepository(staleDir).replace(renamed, old.revision());
+            release.countDown(); gate.get(); storage.find(old.id()).get(); f.tick();
+            assertTrue(sender.messages.getLast().contains("changed concurrently"));
+            assertEquals(BigInteger.ZERO, storage.find(old.id()).get().orElseThrow().experience());
+            assertTrue(target.messages.stream().noneMatch(message -> message.contains("administrator")));
+        }
+        var logoutDir = data.resolve("logout");
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(logoutDir)) {
+            f.plugin.setEnabled(true); var target = active(f, logoutDir, "Departing Hero"); var storage = storage(f);
+            var sender = new EquipmentAdminCommandNativeTest.Sender();
+            f.command.execute(sender.port, "fantasystick", new String[]{"experience", "give", "Departing", "Hero", "75"});
+            target.core.online = false;
+            storage.find(target.core.record.id()).get(); f.tick();
+            assertEquals(BigInteger.valueOf(75), storage.find(target.core.record.id()).get().orElseThrow().experience());
+            assertTrue(sender.messages.getLast().contains("applied 75"));
+            assertTrue(target.messages.stream().noneMatch(message -> message.contains("administrator")));
+        }
+        var repeatDir = data.resolve("repeat");
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(repeatDir)) {
+            f.plugin.setEnabled(true); var target = active(f, repeatDir, "One Award"); var storage = storage(f);
+            var first = new EquipmentAdminCommandNativeTest.Sender(); var second = new EquipmentAdminCommandNativeTest.Sender();
+            f.command.execute(first.port, "fantasystick", new String[]{"experience", "give", "One", "Award", "25"});
+            f.command.execute(second.port, "fantasystick", new String[]{"experience", "give", "One", "Award", "25"});
+            storage.find(target.core.record.id()).get(); f.tick(); f.tick();
+            assertEquals(BigInteger.valueOf(25), storage.find(target.core.record.id()).get().orElseThrow().experience());
+            assertEquals(1, List.of(first.messages.getLast(), second.messages.getLast()).stream()
+                .filter(message -> message.contains("applied 25")).count());
+            assertEquals(1, List.of(first.messages.getLast(), second.messages.getLast()).stream()
+                .filter(message -> message.contains("changed concurrently")).count());
+        }
+    }
+
+    @Test void realFilesystemSaveFailureReportsNoSuccessOrPlayerFeedback() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true); var target = active(f, data, "Broken Save");
+            var sender = new EquipmentAdminCommandNativeTest.Sender();
+            var path = data.resolve("characters").resolve(target.core.record.id() + ".yml");
+            java.nio.file.Files.delete(path); java.nio.file.Files.createDirectory(path);
+            int feedback = target.messages.size();
+            f.command.execute(sender.port, "fantasystick", new String[]{"experience", "give", "Broken", "Save", "20"});
+            f.tick();
+            assertTrue(sender.messages.getLast().contains("failed before acknowledgment"));
+            assertEquals(feedback, target.messages.size());
+            assertTrue(sender.messages.stream().noneMatch(message -> message.startsWith("Granted 20")));
+        }
+    }
+
+    private static CharacterRecord copy(CharacterRecord old, String name, BigInteger revision) {
+        return new CharacterRecord(old.id(), name, revision, old.stats(), old.level(), old.experience(), old.unspentPoints(),
+            old.health(), old.learned(), old.loadout(), old.cooldowns(), old.restrictedKills(), old.dead(), old.deathId(), old.diedAt());
+    }
+
+    private static FantasyStickLifecycleNativeTest.Actor active(FantasyStickLifecycleNativeTest.Fixture f,
+            Path data, String name) throws Exception {
+        var actor = new FantasyStickLifecycleNativeTest.Actor(data);
+        storage(f).renameCharacter(actor.core.record.id(), name).get();
+        f.players.put(actor.core.id, actor.player); f.activate(actor); return actor;
+    }
+    private static CharacterStorage storage(FantasyStickLifecycleNativeTest.Fixture f) {
+        return (CharacterStorage) FantasyStickLifecycleNativeTest.Fixture.field(f.plugin, "characters");
+    }
+    private static String bookText(org.bukkit.inventory.ItemStack book) {
+        var content = org.bukkit.craftbukkit.inventory.CraftItemStack.asNMSCopy(book)
+            .get(net.minecraft.core.component.DataComponents.WRITTEN_BOOK_CONTENT);
+        assertNotNull(content);
+        return content.pages().stream().map(page -> page.raw().getString()).collect(java.util.stream.Collectors.joining("\n"));
+    }
+}

src/nativeTest/java/games/dmg/fantasystick/AdminRevivalNativeTest.java

@@ -0,0 +1,28 @@
+package games.dmg.fantasystick;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+import java.math.BigInteger;
+import java.nio.file.Path;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+class AdminRevivalNativeTest {
+ @TempDir Path data;
+ @BeforeAll static void bootstrap()throws Exception{NativeRuntime.bootstrap();}
+ @Test void commandCompletionConfigurationAndValidationArePermissionAwareAndDurable()throws Exception{try(var f=new FantasyStickLifecycleNativeTest.Fixture(data)){f.plugin.setEnabled(true);var admin=new FantasyStickLifecycleNativeTest.Actor(data);var target=new FantasyStickLifecycleNativeTest.Actor(data);doReturn("Admin").when(admin.player).getName();doReturn("Target").when(target.player).getName();doReturn(true).when(admin.player).hasPermission("fantasystick.admin");f.players.put(admin.core.id,admin.player);f.players.put(target.core.id,target.player);assertEquals(java.util.List.of("revive"),f.command.tabComplete(admin.player,"fantasystick",new String[]{"rev"}));assertEquals(java.util.List.of("Target"),f.command.tabComplete(admin.player,"fantasystick",new String[]{"revive","Tar"}));assertTrue(f.command.tabComplete(admin.player,"fantasystick",new String[]{"revive","Target",""}).isEmpty());doReturn(false).when(admin.player).hasPermission("fantasystick.admin");assertTrue(f.command.tabComplete(admin.player,"fantasystick",new String[]{"revive",""}).isEmpty());doReturn(true).when(admin.player).hasPermission("fantasystick.admin");f.command.execute(admin.player,"fantasystick",new String[]{"revive"});assertTrue(admin.messages.getLast().contains("Usage"));f.command.execute(admin.player,"fantasystick",new String[]{"revive","Missing"});assertTrue(admin.messages.getLast().contains("target must name"));var sender=new EquipmentAdminCommandNativeTest.Sender();sender.allowed=false;assertTrue(f.command.tabComplete(sender.port,"fantasystick",new String[]{"config","admin-rev"}).isEmpty());f.command.execute(sender.port,"fantasystick",new String[]{"config","admin-revive-selection-timeout-seconds","90"});assertTrue(sender.messages.getLast().contains("Permission denied"));sender.allowed=true;f.command.execute(sender.port,"fantasystick",new String[]{"config","admin-revive-selection-timeout-seconds","90","extra"});assertTrue(sender.messages.getLast().contains("Usage"));assertEquals(java.util.List.of("admin-revive-selection-timeout-seconds"),f.command.tabComplete(sender.port,"fantasystick",new String[]{"config","admin-rev"}));assertEquals(java.util.List.of("60"),f.command.tabComplete(sender.port,"fantasystick",new String[]{"config","admin-revive-selection-timeout-seconds",""}));f.command.execute(sender.port,"fantasystick",new String[]{"config","admin-revive-selection-timeout-seconds"});assertTrue(sender.messages.getLast().contains("=60"));for(String invalid:java.util.List.of("0","-1","1.5","bad")){f.command.execute(sender.port,"fantasystick",new String[]{"config","admin-revive-selection-timeout-seconds",invalid});assertTrue(sender.messages.getLast().contains("invalid"));}var pendingDead=dead(data,Instant.now().minusSeconds(60).truncatedTo(ChronoUnit.SECONDS));target.core.inventory.setItem(10,new games.dmg.fantasystick.items.TailBooks().create(pendingDead));f.command.execute(admin.player,"fantasystick",new String[]{"revive","Target"});((games.dmg.fantasystick.persistence.CharacterStorage)FantasyStickLifecycleNativeTest.Fixture.field(f.plugin,"characters")).find(pendingDead.id()).get();f.tick();assertEquals(1200L,f.delayedTicks.getLast());int before=sender.messages.size();f.command.execute(sender.port,"fantasystick",new String[]{"config","admin-revive-selection-timeout-seconds","90"});assertEquals(before,sender.messages.size());var response=f.tasks.poll(5,java.util.concurrent.TimeUnit.SECONDS);assertNotNull(response);response.run();assertTrue(sender.messages.getLast().contains("=90"));f.command.execute(admin.player,"fantasystick",new String[]{"revive","Target"});((games.dmg.fantasystick.persistence.CharacterStorage)FantasyStickLifecycleNativeTest.Fixture.field(f.plugin,"characters")).find(pendingDead.id()).get();f.tick();assertEquals(1800L,f.delayedTicks.getLast());assertTrue(f.delayedTicks.contains(1200L));f.plugin.setEnabled(false);f.plugin.setEnabled(true);f.command.execute(sender.port,"fantasystick",new String[]{"config","admin-revive-selection-timeout-seconds"});assertTrue(sender.messages.getLast().contains("=90"));}
+  var failed=data.resolve("failed-write");java.nio.file.Files.createDirectories(failed);try(var f=new FantasyStickLifecycleNativeTest.Fixture(failed)){f.plugin.setEnabled(true);java.nio.file.Files.createDirectory(failed.resolve("config.yml"));var sender=new EquipmentAdminCommandNativeTest.Sender();f.command.execute(sender.port,"fantasystick",new String[]{"config","admin-revive-selection-timeout-seconds","90"});var response=f.tasks.poll(5,java.util.concurrent.TimeUnit.SECONDS);assertNotNull(response);response.run();assertTrue(sender.messages.getLast().contains("save failed"));f.command.execute(sender.port,"fantasystick",new String[]{"config","admin-revive-selection-timeout-seconds"});assertTrue(sender.messages.getLast().contains("=60"));}
+  for(String invalid:java.util.List.of("0","-1","1.5","bad")){var dir=data.resolve(invalid.replace('.','_'));java.nio.file.Files.createDirectories(dir);java.nio.file.Files.writeString(dir.resolve("config.yml"),"admin-revive-selection-timeout-seconds: '"+invalid+"'\n");try(var f=new FantasyStickLifecycleNativeTest.Fixture(dir)){assertThrows(IllegalArgumentException.class,()->f.plugin.setEnabled(true));assertTrue(f.order.isEmpty());}}}
+ @Test void registeredAdminSelectsAnExpiredDirectTailAndRestoresSameCharacterWithoutChangingTargetState()throws Exception{try(var f=new FantasyStickLifecycleNativeTest.Fixture(data)){f.plugin.setEnabled(true);var admin=new FantasyStickLifecycleNativeTest.Actor(data);var target=new FantasyStickLifecycleNativeTest.Actor(data);doReturn("Admin").when(admin.player).getName();doReturn("Target").when(target.player).getName();doReturn(true).when(admin.player).hasPermission("fantasystick.admin");f.players.put(admin.core.id,admin.player);f.players.put(target.core.id,target.player);f.activate(target);var dead=dead(data,Instant.now().minusSeconds(172800).truncatedTo(ChronoUnit.SECONDS));var tail=new games.dmg.fantasystick.items.TailBooks().create(dead);tail.setAmount(2);target.core.inventory.setItem(10,tail);var beforeHealth=target.core.health;var beforeMode=target.core.gameMode;var beforeLocation=target.core.location.clone();
+  assertTrue(f.command.execute(admin.player,"fantasystick",new String[]{"revive","Target"}));var storage=(games.dmg.fantasystick.persistence.CharacterStorage)FantasyStickLifecycleNativeTest.Fixture.field(f.plugin,"characters");storage.find(dead.id()).get();f.tick();assertEquals(1,admin.inventories.size());assertTrue(target.inventories.isEmpty());var popup=admin.inventories.getFirst();assertEquals(1,java.util.stream.IntStream.range(0,popup.getSize()).filter(i->popup.getItem(i)!=null).count());var view=mock(org.bukkit.inventory.InventoryView.class);when(view.getTopInventory()).thenReturn(popup);when(view.getBottomInventory()).thenReturn(admin.core.inventory);when(view.getPlayer()).thenReturn(admin.player);var click=new org.bukkit.event.inventory.InventoryClickEvent(view,org.bukkit.event.inventory.InventoryType.SlotType.CONTAINER,0,org.bukkit.event.inventory.ClickType.LEFT,org.bukkit.event.inventory.InventoryAction.PICKUP_ALL);f.dispatcher.accept(click);assertTrue(click.isCancelled());PartyBookNativeTest.drain(f);((games.dmg.fantasystick.persistence.RevivalStore)FantasyStickLifecycleNativeTest.Fixture.field(f.plugin,"revivals")).find(dead.id()).join();for(int i=0;i<4;i++)PartyBookNativeTest.drain(f);var restored=storage.find(dead.id()).get().orElseThrow();assertFalse(restored.dead());var sheets=new games.dmg.fantasystick.items.CharacterSheets();assertEquals(1,java.util.stream.IntStream.range(0,41).filter(slot->(slot<=35||slot==40)&&sheets.identify(target.core.inventory.getItem(slot)).filter(dead.id()::equals).isPresent()).count());assertEquals(1,target.core.inventory.getItem(10).getAmount());assertEquals(dead.deathId(),new games.dmg.fantasystick.items.TailBooks().identify(target.core.inventory.getItem(10)).orElseThrow().deathId());assertEquals(restored.maximumHealth(),restored.health());assertEquals(dead.stats(),restored.stats());assertEquals(dead.level(),restored.level());assertEquals(dead.experience(),restored.experience());assertEquals(dead.unspentPoints(),restored.unspentPoints());assertEquals(dead.learned(),restored.learned());assertEquals(dead.loadout(),restored.loadout());assertEquals(dead.cooldowns(),restored.cooldowns());f.dispatcher.accept(click);assertEquals(1,java.util.stream.IntStream.range(0,41).filter(slot->(slot<=35||slot==40)&&sheets.identify(target.core.inventory.getItem(slot)).filter(dead.id()::equals).isPresent()).count());assertEquals(1,target.core.inventory.getItem(10).getAmount());assertEquals(beforeHealth,target.core.health);assertEquals(beforeMode,target.core.gameMode);assertEquals(beforeLocation,target.core.location);assertEquals(target.core.record.id(),((games.dmg.fantasystick.session.EquipmentSessions)FantasyStickLifecycleNativeTest.Fixture.field(f.plugin,"sessions")).active(target.core.id).orElseThrow().character());}}
+ @Test void failedCharacterRestoreRetainsOneSheetAndReservationWithoutFalseSuccess()throws Exception{try(var f=new FantasyStickLifecycleNativeTest.Fixture(data)){f.plugin.setEnabled(true);var admin=new FantasyStickLifecycleNativeTest.Actor(data);var target=new FantasyStickLifecycleNativeTest.Actor(data);doReturn("Admin").when(admin.player).getName();doReturn("Target").when(target.player).getName();doReturn(true).when(admin.player).hasPermission("fantasystick.admin");f.players.put(admin.core.id,admin.player);f.players.put(target.core.id,target.player);var dead=dead(data,Instant.now().minusSeconds(172800).truncatedTo(ChronoUnit.SECONDS));target.core.inventory.setItem(10,new games.dmg.fantasystick.items.TailBooks().create(dead));f.command.execute(admin.player,"fantasystick",new String[]{"revive","Target"});PartyBookNativeTest.drain(f);var popup=admin.inventories.getFirst();var corrupted=new java.util.concurrent.atomic.AtomicBoolean();target.core.mutation=()->{if(!corrupted.compareAndSet(false,true))return;try{var path=data.resolve("characters").resolve(dead.id()+".yml");java.nio.file.Files.delete(path);java.nio.file.Files.createDirectory(path);}catch(Exception e){throw new RuntimeException(e);}};var view=mock(org.bukkit.inventory.InventoryView.class);when(view.getTopInventory()).thenReturn(popup);when(view.getBottomInventory()).thenReturn(admin.core.inventory);when(view.getPlayer()).thenReturn(admin.player);f.dispatcher.accept(new org.bukkit.event.inventory.InventoryClickEvent(view,org.bukkit.event.inventory.InventoryType.SlotType.CONTAINER,0,org.bukkit.event.inventory.ClickType.LEFT,org.bukkit.event.inventory.InventoryAction.PICKUP_ALL));PartyBookNativeTest.drain(f);var revival=(games.dmg.fantasystick.persistence.RevivalStore)FantasyStickLifecycleNativeTest.Fixture.field(f.plugin,"revivals");revival.find(dead.id()).join();for(int i=0;i<3;i++)PartyBookNativeTest.drain(f);assertEquals(dead.id(),new games.dmg.fantasystick.items.CharacterSheets().identify(target.core.inventory.getItem(10)).orElseThrow());assertTrue(revival.find(dead.id()).join().isPresent());assertFalse(admin.messages.stream().anyMatch(message->message.startsWith("Administratively restored")));target.core.mutation=()->{};}}
+ @Test void competingAdministratorsCanConsumeOneDeathOnlyOnce()throws Exception{try(var f=new FantasyStickLifecycleNativeTest.Fixture(data)){f.plugin.setEnabled(true);var a=new FantasyStickLifecycleNativeTest.Actor(data);var b=new FantasyStickLifecycleNativeTest.Actor(data);var target=new FantasyStickLifecycleNativeTest.Actor(data);doReturn("AdminA").when(a.player).getName();doReturn("AdminB").when(b.player).getName();doReturn("Target").when(target.player).getName();doReturn(true).when(a.player).hasPermission("fantasystick.admin");doReturn(true).when(b.player).hasPermission("fantasystick.admin");f.players.put(a.core.id,a.player);f.players.put(b.core.id,b.player);f.players.put(target.core.id,target.player);var dead=dead(data,Instant.now().minusSeconds(172800).truncatedTo(ChronoUnit.SECONDS));target.core.inventory.setItem(10,new games.dmg.fantasystick.items.TailBooks().create(dead));f.command.execute(a.player,"fantasystick",new String[]{"revive","Target"});f.command.execute(b.player,"fantasystick",new String[]{"revive","Target"});PartyBookNativeTest.drain(f);assertEquals(1,a.inventories.size());assertEquals(1,b.inventories.size());for(var admin:java.util.List.of(a,b)){var popup=admin.inventories.getFirst();var view=mock(org.bukkit.inventory.InventoryView.class);when(view.getTopInventory()).thenReturn(popup);when(view.getBottomInventory()).thenReturn(admin.core.inventory);when(view.getPlayer()).thenReturn(admin.player);f.dispatcher.accept(new org.bukkit.event.inventory.InventoryClickEvent(view,org.bukkit.event.inventory.InventoryType.SlotType.CONTAINER,0,org.bukkit.event.inventory.ClickType.LEFT,org.bukkit.event.inventory.InventoryAction.PICKUP_ALL));}PartyBookNativeTest.drain(f);var revival=(games.dmg.fantasystick.persistence.RevivalStore)FantasyStickLifecycleNativeTest.Fixture.field(f.plugin,"revivals");revival.find(dead.id()).join();for(int i=0;i<4;i++)PartyBookNativeTest.drain(f);var storage=(games.dmg.fantasystick.persistence.CharacterStorage)FantasyStickLifecycleNativeTest.Fixture.field(f.plugin,"characters");assertFalse(storage.find(dead.id()).get().orElseThrow().dead());var sheets=new games.dmg.fantasystick.items.CharacterSheets();assertEquals(1,java.util.stream.IntStream.range(0,41).filter(slot->(slot<=35||slot==40)&&sheets.identify(target.core.inventory.getItem(slot)).filter(dead.id()::equals).isPresent()).count());}}
+ @Test void counterfeitLivingAndLifecycleCancelledSelectionsNeverChangeItems()throws Exception{try(var f=new FantasyStickLifecycleNativeTest.Fixture(data)){f.plugin.setEnabled(true);var admin=new FantasyStickLifecycleNativeTest.Actor(data);var target=new FantasyStickLifecycleNativeTest.Actor(data);doReturn("Admin").when(admin.player).getName();doReturn("Target").when(target.player).getName();doReturn(true).when(admin.player).hasPermission("fantasystick.admin");f.players.put(admin.core.id,admin.player);f.players.put(target.core.id,target.player);target.core.inventory.setItem(10,new org.bukkit.inventory.ItemStack(org.bukkit.Material.WRITTEN_BOOK));f.command.execute(admin.player,"fantasystick",new String[]{"revive","Target"});assertTrue(admin.messages.getLast().contains("no authentic"));var livingTailRecord=dead(data,Instant.now().minusSeconds(60).truncatedTo(ChronoUnit.SECONDS));var livingTail=new games.dmg.fantasystick.items.TailBooks().create(livingTailRecord);var storage=(games.dmg.fantasystick.persistence.CharacterStorage)FantasyStickLifecycleNativeTest.Fixture.field(f.plugin,"characters");storage.restoreDeathRecordAdministratively(livingTailRecord.id(),livingTailRecord.deathId(),new java.math.BigDecimal("1024")).get();target.core.inventory.setItem(10,livingTail);f.command.execute(admin.player,"fantasystick",new String[]{"revive","Target"});storage.find(livingTailRecord.id()).get();f.tick();assertTrue(admin.messages.getLast().contains("no current"));var dead=dead(data,Instant.now().minusSeconds(60).truncatedTo(ChronoUnit.SECONDS));var tail=new games.dmg.fantasystick.items.TailBooks().create(dead);target.core.inventory.setItem(10,tail);f.command.execute(admin.player,"fantasystick",new String[]{"revive","Target"});storage.find(dead.id()).get();f.tick();var popup=admin.inventories.getFirst();f.plugin.setEnabled(false);assertNull(popup.getItem(0));assertEquals(tail,target.core.inventory.getItem(10));}}
+ @Test void administrativeReservationResumesAfterRestartWithoutWeakeningDeathIdentity()throws Exception{var target=new FantasyStickLifecycleNativeTest.Actor(data);doReturn("Target").when(target.player).getName();var dead=dead(data,Instant.now().minusSeconds(172800).truncatedTo(ChronoUnit.SECONDS));var provisional=new games.dmg.fantasystick.persistence.CharacterRecord(dead.id(),dead.name(),dead.revision(),dead.stats(),dead.level(),dead.experience(),dead.unspentPoints(),dead.maximumHealth(),dead.learned(),dead.loadout(),dead.cooldowns(),dead.restrictedKills(),false,dead.deathId(),dead.diedAt());target.core.inventory.setItem(10,new games.dmg.fantasystick.items.CharacterSheets().create(provisional));var reservation=new games.dmg.fantasystick.persistence.RevivalStore.Reservation(java.util.UUID.randomUUID(),java.util.UUID.randomUUID(),target.core.id,dead.id(),dead.deathId(),Instant.now().truncatedTo(ChronoUnit.SECONDS),10,1,-1,true);try(var store=new games.dmg.fantasystick.persistence.RevivalStore(data)){assertTrue(store.reserve(reservation).join().isPresent());}try(var f=new FantasyStickLifecycleNativeTest.Fixture(data)){f.players.put(target.core.id,target.player);f.plugin.setEnabled(true);var revivals=(games.dmg.fantasystick.persistence.RevivalStore)FantasyStickLifecycleNativeTest.Fixture.field(f.plugin,"revivals");revivals.target(target.core.id).join();for(int i=0;i<4;i++)PartyBookNativeTest.drain(f);var storage=(games.dmg.fantasystick.persistence.CharacterStorage)FantasyStickLifecycleNativeTest.Fixture.field(f.plugin,"characters");assertFalse(storage.find(dead.id()).get().orElseThrow().dead());assertTrue(revivals.find(dead.id()).join().isEmpty());assertEquals(dead.id(),new games.dmg.fantasystick.items.CharacterSheets().identify(target.core.inventory.getItem(10)).orElseThrow());}}
+ @Test void multipleChoicesSelectExactItemWhilePermissionLossMovementAndTimeoutCancelWithoutMutation()throws Exception{for(String route:java.util.List.of("select-recent","select-second","permission","movement","timeout")){var dir=data.resolve(route);try(var f=new FantasyStickLifecycleNativeTest.Fixture(dir)){f.plugin.setEnabled(true);var admin=new FantasyStickLifecycleNativeTest.Actor(dir);var target=new FantasyStickLifecycleNativeTest.Actor(dir);doReturn("Admin").when(admin.player).getName();doReturn("Target").when(target.player).getName();doReturn(true).when(admin.player).hasPermission("fantasystick.admin");f.players.put(admin.core.id,admin.player);f.players.put(target.core.id,target.player);var first=dead(dir,Instant.now().minusSeconds(60).truncatedTo(ChronoUnit.SECONDS));var second=dead(dir,Instant.now().minusSeconds(86400).truncatedTo(ChronoUnit.SECONDS));var firstTail=new games.dmg.fantasystick.items.TailBooks().create(first);var secondTail=new games.dmg.fantasystick.items.TailBooks().create(second);target.core.inventory.setItem(10,firstTail);target.core.inventory.setItem(11,secondTail);var storage=(games.dmg.fantasystick.persistence.CharacterStorage)FantasyStickLifecycleNativeTest.Fixture.field(f.plugin,"characters");f.command.execute(admin.player,"fantasystick",new String[]{"revive","Target"});storage.find(first.id()).get();f.tick();var popup=admin.inventories.getFirst();assertEquals(2,java.util.stream.IntStream.range(0,popup.getSize()).filter(i->popup.getItem(i)!=null).count());assertTrue(f.delayedTicks.contains(1200L));if(route.equals("timeout")){f.delayed.getLast().run();assertEquals(firstTail,target.core.inventory.getItem(10));assertEquals(secondTail,target.core.inventory.getItem(11));continue;}var view=mock(org.bukkit.inventory.InventoryView.class);when(view.getTopInventory()).thenReturn(popup);when(view.getBottomInventory()).thenReturn(admin.core.inventory);when(view.getPlayer()).thenReturn(admin.player);if(route.equals("permission"))doReturn(false).when(admin.player).hasPermission("fantasystick.admin");if(route.equals("movement"))target.core.inventory.setItem(11,new org.bukkit.inventory.ItemStack(org.bukkit.Material.DIAMOND));int selected=route.equals("select-recent")?0:1;f.dispatcher.accept(new org.bukkit.event.inventory.InventoryClickEvent(view,org.bukkit.event.inventory.InventoryType.SlotType.CONTAINER,selected,org.bukkit.event.inventory.ClickType.LEFT,org.bukkit.event.inventory.InventoryAction.PICKUP_ALL));PartyBookNativeTest.drain(f);if(route.startsWith("select-")){var selectedRecord=route.equals("select-recent")?first:second;var revival=(games.dmg.fantasystick.persistence.RevivalStore)FantasyStickLifecycleNativeTest.Fixture.field(f.plugin,"revivals");revival.find(selectedRecord.id()).join();for(int i=0;i<3;i++)PartyBookNativeTest.drain(f);assertEquals(!route.equals("select-recent"),storage.find(first.id()).get().orElseThrow().dead());assertEquals(route.equals("select-recent"),storage.find(second.id()).get().orElseThrow().dead());if(route.equals("select-recent")){assertEquals(first.id(),new games.dmg.fantasystick.items.CharacterSheets().identify(target.core.inventory.getItem(10)).orElseThrow());assertEquals(secondTail,target.core.inventory.getItem(11));}else{assertEquals(firstTail,target.core.inventory.getItem(10));assertEquals(second.id(),new games.dmg.fantasystick.items.CharacterSheets().identify(target.core.inventory.getItem(11)).orElseThrow());}}else{assertTrue(storage.find(first.id()).get().orElseThrow().dead());assertTrue(storage.find(second.id()).get().orElseThrow().dead());assertEquals(firstTail,target.core.inventory.getItem(10));assertEquals(route.equals("movement")?org.bukkit.Material.DIAMOND:org.bukkit.Material.WRITTEN_BOOK,target.core.inventory.getItem(11).getType());}}}}
+ static games.dmg.fantasystick.persistence.CharacterRecord dead(Path data,Instant died)throws Exception{var base=new games.dmg.fantasystick.crafting.CharacterFactory().create(games.dmg.fantasystick.progression.ProgressionRules.defaults());var record=new games.dmg.fantasystick.persistence.CharacterRecord(base.id(),"Ancient Mira",base.revision(),base.stats(),7,BigInteger.valueOf(642),BigInteger.valueOf(11),java.math.BigDecimal.ZERO,java.util.Set.of("fireball"),java.util.List.of("fireball","","","","","",""),java.util.Map.of("fireball",Instant.now().plusSeconds(30)),base.restrictedKills(),true,java.util.UUID.randomUUID(),died);new games.dmg.fantasystick.persistence.YamlCharacterRepository(data).create(record);return record;}
+}

src/nativeTest/java/games/dmg/fantasystick/BasicAttackNativeTest.java

@@ -0,0 +1,114 @@
+package games.dmg.fantasystick;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+import java.nio.file.Path;
+import java.time.Clock;
+import java.time.Instant;
+import java.time.ZoneId;
+import java.time.ZoneOffset;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+class BasicAttackNativeTest {
+    @TempDir Path data;
+    @BeforeAll static void bootstrap() throws Exception { NativeRuntime.bootstrap(); }
+
+    @Test void successfulHitsStartAnExactOneSecondCadenceButCancelledDamageDoesNot() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var a = new FantasyStickLifecycleNativeTest.Actor(data);
+            f.players.put(a.core.id, a.player); f.activate(a);
+            var sessions = (games.dmg.fantasystick.session.EquipmentSessions)
+                FantasyStickLifecycleNativeTest.Fixture.field(f.plugin, "sessions");
+            var active = sessions.active(a.core.id).orElseThrow();
+            var clock = new MutableClock(Instant.parse("2026-09-19T00:00:00Z"));
+            var basic = new games.dmg.fantasystick.combat.BasicAttack(sessions, clock);
+            var target = mock(org.bukkit.entity.LivingEntity.class);
+            var cancelled = new java.util.concurrent.atomic.AtomicBoolean(true);
+            doAnswer(call -> {
+                var source = mock(org.bukkit.damage.DamageSource.class);
+                when(source.getCausingEntity()).thenReturn(a.player);
+                when(source.getDirectEntity()).thenReturn(a.player);
+                var event = new org.bukkit.event.entity.EntityDamageByEntityEvent(a.player, target,
+                    org.bukkit.event.entity.EntityDamageEvent.DamageCause.ENTITY_ATTACK, source, (Double) call.getArgument(0));
+                event.setCancelled(cancelled.get());
+                basic.acceptedDamage(event);
+                return null;
+            }).when(target).damage(anyDouble(), same(a.player));
+            var input = new games.dmg.fantasystick.session.ControlInput(a.player, active, 1, "",
+                games.dmg.fantasystick.session.ControlInput.Kind.BASIC_ATTACK,
+                games.dmg.fantasystick.session.ControlInput.Gesture.ATTACK, target, 0, 1,
+                () -> sessions.current(active));
+            basic.accept(input); // Cancelled: no cadence spent.
+            cancelled.set(false);
+            basic.accept(input); // Accepted at t=0.
+            clock.advance(java.time.Duration.ofMillis(999)); basic.accept(input);
+            verify(target, times(2)).damage(1.0, a.player);
+            clock.advance(java.time.Duration.ofMillis(1)); basic.accept(input);
+            verify(target, times(3)).damage(1.0, a.player);
+            a.core.inventory.setItemInOffHand(null); f.changed(a);
+            clock.advance(java.time.Duration.ofSeconds(1)); basic.accept(input);
+            verifyNoMoreInteractions(target);
+        }
+    }
+
+    @Test void partyCancellationPreventsDamageAndDoesNotSpendThePackagedAttackCadence() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var a = new FantasyStickLifecycleNativeTest.Actor(data);
+            var b = new FantasyStickLifecycleNativeTest.Actor(data);
+            f.players.put(a.core.id, a.player); f.players.put(b.core.id, b.player);
+            f.activate(a); f.activate(b);
+            var parties = PartyLifecycleNativeTest.parties(f);
+            var party = parties.create(a.core.id).orElseThrow();
+            assertTrue(parties.accept(b.core.id, parties.invite(a.core.id, party.id(), b.core.id).orElseThrow().id()));
+            var events = new java.util.ArrayList<org.bukkit.event.entity.EntityDamageByEntityEvent>();
+            doAnswer(call -> {
+                var source = mock(org.bukkit.damage.DamageSource.class);
+                when(source.getCausingEntity()).thenReturn(a.player);
+                when(source.getDirectEntity()).thenReturn(a.player);
+                var event = new org.bukkit.event.entity.EntityDamageByEntityEvent(a.player, b.player,
+                    org.bukkit.event.entity.EntityDamageEvent.DamageCause.ENTITY_ATTACK, source, (Double) call.getArgument(0));
+                events.add(event); f.dispatcher.accept(event); return null;
+            }).when(b.player).damage(anyDouble(), same(a.player));
+            a.core.inventory.getInventory().setSelectedSlot(1);
+            f.dispatcher.accept(new io.papermc.paper.event.player.PrePlayerAttackEntityEvent(a.player, b.player, true));
+            assertEquals(1, events.size()); assertTrue(events.getFirst().isCancelled());
+            assertTrue(parties.leave(a.core.id, party.id()));
+            f.dispatcher.accept(new io.papermc.paper.event.player.PrePlayerAttackEntityEvent(a.player, b.player, true));
+            assertEquals(2, events.size()); assertFalse(events.getLast().isCancelled());
+            f.dispatcher.accept(new io.papermc.paper.event.player.PrePlayerAttackEntityEvent(a.player, b.player, true));
+            assertEquals(2, events.size(), "The accepted second hit starts cadence; the cancelled first hit did not");
+        }
+    }
+
+    @Test void packagedBasicStickInputDealsOneLowStrengthHitWithoutVanillaContinuation() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var a = new FantasyStickLifecycleNativeTest.Actor(data);
+            f.players.put(a.core.id, a.player); f.activate(a);
+            a.core.inventory.getInventory().setSelectedSlot(1);
+            var target = mock(org.bukkit.entity.LivingEntity.class);
+            var attack = new io.papermc.paper.event.player.PrePlayerAttackEntityEvent(a.player, target, true);
+            f.dispatcher.accept(attack);
+            assertTrue(attack.isCancelled(), "The icon stick must never continue into vanilla damage");
+            verify(target).damage(1.0, a.player);
+            a.core.inventory.setItemInOffHand(null); f.changed(a); f.awaitCharacterAndReceipt(a);
+            assertEquals(org.bukkit.Material.DIAMOND_SWORD, a.core.inventory.getItem(0).getType());
+            assertTrue(a.core.inventory.getItem(1) == null || a.core.inventory.getItem(1).isEmpty(),
+                "Exit restores the ordinary item that occupied the basic-stick slot");
+        }
+    }
+
+    private static final class MutableClock extends Clock {
+        private Instant now;
+        MutableClock(Instant now) { this.now = now; }
+        void advance(java.time.Duration duration) { now = now.plus(duration); }
+        @Override public ZoneId getZone() { return ZoneOffset.UTC; }
+        @Override public Clock withZone(ZoneId zone) { return this; }
+        @Override public Instant instant() { return now; }
+    }
+}

src/nativeTest/java/games/dmg/fantasystick/ChainLightningNativeTest.java

@@ -0,0 +1,239 @@
+package games.dmg.fantasystick;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.ArgumentMatchers.*;
+import static org.mockito.Mockito.*;
+
+import games.dmg.fantasystick.ability.*;
+import games.dmg.fantasystick.party.PartyRoster;
+import games.dmg.fantasystick.persistence.CharacterRecord;
+import games.dmg.fantasystick.persistence.YamlCharacterRepository;
+import games.dmg.fantasystick.progression.Stat;
+import games.dmg.fantasystick.session.ControlInput;
+import games.dmg.fantasystick.session.EquipmentSessions;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.nio.file.Path;
+import java.util.*;
+import java.util.concurrent.TimeUnit;
+import org.bukkit.Location;
+import org.bukkit.damage.DamageSource;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Player;
+import org.bukkit.event.entity.EntityDamageEvent;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+class ChainLightningNativeTest {
+    @TempDir Path data;
+    @BeforeAll static void nativeRuntime() throws Exception { NativeRuntime.bootstrap(); }
+
+    @Test void characterBookPurchaseAssignmentAndEquippedControlExecuteNativeChain() throws Exception {
+        java.nio.file.Files.writeString(data.resolve("config.yml"), "chain-lightning-cooldown-seconds: 0\n");
+        try (var fixture = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            fixture.plugin.setEnabled(true); var caster = new FantasyStickLifecycleNativeTest.Actor(data); prepareCaster(data, caster, false);
+            fixture.players.put(caster.core.id, caster.player); fixture.activate(caster);
+            caster.core.inventory.getInventory().setSelectedSlot(0); PartyBookNativeTest.open(fixture, caster);
+            String text = PartyBookNativeTest.text(caster).replaceAll("\\s+", "");
+            assertTrue(text.contains("ChainLightning")); assertTrue(text.contains("INT20")); assertTrue(text.contains("DEX12"));
+            PartyBookNativeTest.click(fixture, caster, button(caster, "[Learn]", "chain_lightning")); drain(fixture, 2);
+            var first = mock(LivingEntity.class); var second = mock(LivingEntity.class);
+            locate(first, caster.world, UUID.randomUUID(), 10); locate(second, caster.world, UUID.randomUUID(), 14);
+            doReturn(new Location(caster.world, 0, 64, 0)).when(caster.player).getLocation();
+            doReturn(new Location(caster.world, 0, 65, 0)).when(caster.player).getEyeLocation();
+            doReturn(true).when(caster.player).hasLineOfSight(first);
+            doReturn(new org.bukkit.util.RayTraceResult(new org.bukkit.util.Vector(10, 64, 0), first))
+                .when(caster.world).rayTraceEntities(any(Location.class), any(org.bukkit.util.Vector.class), eq(16.0),
+                    org.mockito.ArgumentMatchers.<java.util.function.Predicate<org.bukkit.entity.Entity>>any());
+            doReturn(List.of(second)).when(first).getNearbyEntities(anyDouble(), anyDouble(), anyDouble()); doReturn(true).when(first).hasLineOfSight(second);
+            var damage = new LinkedHashMap<UUID, Double>(); nativeDamage(fixture, first, damage); nativeDamage(fixture, second, damage);
+            use(fixture, caster); drain(fixture, 2);
+            assertFalse(damage.isEmpty(), caster.messages.toString());
+            assertEquals(13, damage.get(first.getUniqueId()), 1.0e-10); assertEquals(9.75, damage.get(second.getUniqueId()), 1.0e-10);
+            var stored = ((games.dmg.fantasystick.persistence.CharacterStorage) FantasyStickLifecycleNativeTest.Fixture.field(fixture.plugin, "characters"))
+                .find(caster.core.record.id()).get().orElseThrow();
+            assertEquals(BigInteger.valueOf(39), stored.unspentPoints()); assertTrue(stored.learned().contains("chain_lightning"));
+            assertEquals("chain_lightning", stored.loadout().getFirst()); assertNotNull(stored.cooldowns().get("chain_lightning"));
+        }
+    }
+
+    @Test void exactChainUsesNearestUuidTiesFourTargetLimitDecayAndCancellationContinuation() {
+        var sessions = mock(EquipmentSessions.class); var parties = mock(PartyRoster.class); var caster = mock(Player.class);
+        var world = mock(org.bukkit.World.class); UUID casterId = UUID.randomUUID(); when(caster.getUniqueId()).thenReturn(casterId);
+        when(caster.getLocation()).thenReturn(new Location(world, 0, 64, 0)); when(caster.getEyeLocation()).thenReturn(new Location(world, 0, 65, 0));
+        var targets = new ArrayList<LivingEntity>();
+        for (int i = 0; i < 5; i++) { var target = mock(LivingEntity.class); when(target.getUniqueId()).thenReturn(new UUID(0, i + 1));
+            when(target.getLocation()).thenReturn(new Location(world, 4 + i * 2, 64, 0)); when(target.hasLineOfSight(any(org.bukkit.entity.Entity.class))).thenReturn(true); targets.add(target); }
+        when(caster.hasLineOfSight(targets.getFirst())).thenReturn(true);
+        when(targets.get(0).getNearbyEntities(6, 6, 6)).thenReturn(List.of(targets.get(2), targets.get(1), targets.get(1)));
+        when(targets.get(1).getNearbyEntities(6, 6, 6)).thenReturn(List.of(targets.get(3), targets.get(2)));
+        when(targets.get(2).getNearbyEntities(6, 6, 6)).thenReturn(List.of(targets.get(4), targets.get(3)));
+        when(targets.get(3).getNearbyEntities(6, 6, 6)).thenReturn(List.of(targets.get(4)));
+        var active = new EquipmentSessions.Active(casterId, UUID.randomUUID(), UUID.randomUUID());
+        var execution = execution(caster, active, targets.getFirst()); var chain = new ChainLightning(ChainLightning.Settings.defaults(), sessions, parties);
+        when(execution.definition()).thenReturn(chain.definition());
+        var attempted = new LinkedHashMap<UUID, Double>();
+        for (int i = 0; i < targets.size(); i++) { final int index = i; var target = targets.get(i);
+            doAnswer(call -> { double amount = call.getArgument(0); attempted.put(target.getUniqueId(), amount);
+                if (index != 1) chain.acceptedDamage(new EntityDamageEvent(target, EntityDamageEvent.DamageCause.LIGHTNING,
+                    (DamageSource) call.getArgument(1), amount)); return null;
+            }).when(target).damage(anyDouble(), any(DamageSource.class)); }
+        chain.activate(execution);
+        assertEquals(List.of(targets.get(0).getUniqueId(), targets.get(1).getUniqueId(), targets.get(2).getUniqueId(), targets.get(3).getUniqueId()),
+            List.copyOf(attempted.keySet()));
+        assertArrayEquals(new double[]{13, 9.75, 7.3125, 5.484375}, attempted.values().stream().mapToDouble(Double::doubleValue).toArray(), 1.0e-10);
+        verify(targets.get(4), never()).damage(anyDouble(), any(DamageSource.class));
+        verify(execution, times(3)).report(eq(AbilityReport.Type.DAMAGE), any(), any());
+    }
+
+    @Test void boundsVisibilityExclusionsAndEligibilityRaceStopInvalidStrikes() {
+        var sessions = mock(EquipmentSessions.class); var parties = mock(PartyRoster.class); var caster = mock(Player.class);
+        var world = mock(org.bukkit.World.class); when(caster.getUniqueId()).thenReturn(UUID.randomUUID());
+        when(caster.getLocation()).thenReturn(new Location(world, 0, 64, 0)); when(caster.getEyeLocation()).thenReturn(new Location(world, 0, 65, 0));
+        var initial = mock(LivingEntity.class); locate(initial, world, UUID.randomUUID(), 16); when(caster.hasLineOfSight(initial)).thenReturn(true);
+        var blocked = mock(LivingEntity.class); locate(blocked, world, UUID.randomUUID(), 18); when(initial.hasLineOfSight(blocked)).thenReturn(false);
+        var outside = mock(LivingEntity.class); locate(outside, world, UUID.randomUUID(), 22.01); when(initial.hasLineOfSight(outside)).thenReturn(true);
+        var ordinary = mock(Player.class); locate(ordinary, world, UUID.randomUUID(), 18); when(initial.hasLineOfSight(ordinary)).thenReturn(true);
+        when(initial.getNearbyEntities(6, 6, 6)).thenReturn(List.of(blocked, outside, ordinary));
+        var active = new EquipmentSessions.Active(caster.getUniqueId(), UUID.randomUUID(), UUID.randomUUID());
+        var execution = execution(caster, active, initial); var chain = new ChainLightning(ChainLightning.Settings.defaults(), sessions, parties);
+        when(execution.definition()).thenReturn(chain.definition()); chain.activate(execution);
+        verify(initial).damage(anyDouble(), any(DamageSource.class)); verify(blocked, never()).damage(anyDouble(), any(DamageSource.class));
+        verify(outside, never()).damage(anyDouble(), any(DamageSource.class)); verify(ordinary, never()).damage(anyDouble(), any(DamageSource.class));
+        when(execution.stillCurrent()).thenReturn(false); chain.activate(execution); verify(initial, times(1)).damage(anyDouble(), any(DamageSource.class));
+    }
+
+    @Test void jumpInspectionStopsAtSharedCandidateCeiling() {
+        var sessions = mock(EquipmentSessions.class); var parties = mock(PartyRoster.class); var caster = mock(Player.class);
+        var world = mock(org.bukkit.World.class); when(caster.getUniqueId()).thenReturn(UUID.randomUUID());
+        when(caster.getLocation()).thenReturn(new Location(world, 0, 64, 0)); when(caster.getEyeLocation()).thenReturn(new Location(world, 0, 65, 0));
+        var initial = mock(LivingEntity.class); locate(initial, world, UUID.randomUUID(), 10); when(caster.hasLineOfSight(initial)).thenReturn(true);
+        when(initial.hasLineOfSight(any(org.bukkit.entity.Entity.class))).thenReturn(true);
+        var candidates = new ArrayList<org.bukkit.entity.Entity>(); LivingEntity beyond = null;
+        for (int index = 0; index < 257; index++) {
+            var target = mock(LivingEntity.class); locate(target, world, new UUID(1, index + 1), index == 256 ? 10.1 : 15);
+            candidates.add(target); if (index == 256) beyond = target;
+        }
+        when(initial.getNearbyEntities(6, 6, 6)).thenReturn(candidates);
+        var active = new EquipmentSessions.Active(caster.getUniqueId(), UUID.randomUUID(), UUID.randomUUID());
+        var execution = execution(caster, active, initial); var chain = new ChainLightning(ChainLightning.Settings.defaults(), sessions, parties);
+        when(execution.definition()).thenReturn(chain.definition()); chain.activate(execution);
+        verify(initial).damage(anyDouble(), any(DamageSource.class)); verify(beyond, never()).damage(anyDouble(), any(DamageSource.class));
+    }
+
+    @Test void definitionFormulaAndArbitraryPrecisionAreExact() {
+        var chain = new ChainLightning(ChainLightning.Settings.defaults(), mock(EquipmentSessions.class), mock(PartyRoster.class));
+        var definition = chain.definition(); assertEquals("chain_lightning", definition.id()); assertEquals(org.bukkit.Material.LIGHTNING_ROD, definition.icon());
+        assertEquals(java.time.Duration.ofSeconds(18), definition.cooldown()); assertEquals(BigInteger.ONE, definition.pointCost());
+        assertEquals(BigInteger.valueOf(20), definition.requirements().get(Stat.INT)); assertEquals(BigInteger.valueOf(12), definition.requirements().get(Stat.DEX));
+        assertEquals(BigInteger.valueOf(13), ChainLightning.initialDamage(BigInteger.valueOf(20)));
+        assertEquals(BigInteger.valueOf(7), ChainLightning.initialDamage(BigInteger.valueOf(9)));
+        var huge = BigInteger.TEN.pow(500); assertEquals(huge.subtract(BigInteger.TEN).divide(BigInteger.TWO).add(BigInteger.valueOf(8)), ChainLightning.initialDamage(huge));
+    }
+
+    @Test void pluginLoadsEverySettingAndAdminPublishesOnlyAfterDurableSave() throws Exception {
+        java.nio.file.Files.writeString(data.resolve("config.yml"), "chain-lightning-base-damage: 9\nchain-lightning-cooldown-seconds: 4\n"
+            + "chain-lightning-initial-range-blocks: 15\nchain-lightning-jump-range-blocks: 5\nchain-lightning-additional-targets: 2\nchain-lightning-jump-multiplier: 0.5\n");
+        try (var fixture = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            fixture.plugin.setEnabled(true); var registry = (AbilityRegistry) FantasyStickLifecycleNativeTest.Fixture.field(fixture.plugin, "abilityRegistry");
+            var definition = registry.find("chain_lightning").orElseThrow(); assertEquals(new BigDecimal("9"), definition.parameters().get("base-damage"));
+            assertEquals(java.time.Duration.ofSeconds(4), definition.cooldown());
+            assertEquals(0, new BigDecimal("15").compareTo(definition.parameters().get("initial-range")));
+            assertEquals(0, new BigDecimal("5").compareTo(definition.parameters().get("jump-range")));
+            assertEquals(new BigDecimal("2"), definition.parameters().get("additional-targets"));
+            assertEquals(new BigDecimal("0.5"), definition.parameters().get("jump-multiplier"));
+            var sender = new EquipmentAdminCommandNativeTest.Sender(); sender.allowed = false;
+            assertTrue(fixture.command.tabComplete(sender.port, "fantasystick", new String[]{"config", "chain-lightning-"}).isEmpty());
+            fixture.command.execute(sender.port, "fantasystick", new String[]{"config", "chain-lightning-jump-range-blocks", "7"});
+            assertTrue(sender.messages.getLast().contains("Permission denied")); sender.allowed = true;
+            assertEquals(List.of("chain-lightning-additional-targets", "chain-lightning-base-damage", "chain-lightning-cooldown-seconds",
+                "chain-lightning-initial-range-blocks", "chain-lightning-jump-multiplier", "chain-lightning-jump-range-blocks"),
+                fixture.command.tabComplete(sender.port, "fantasystick", new String[]{"config", "chain-lightning-"}));
+            assertEquals(List.of("5", "6"), fixture.command.tabComplete(sender.port, "fantasystick",
+                new String[]{"config", "chain-lightning-jump-range-blocks", ""}));
+            fixture.command.execute(sender.port, "fantasystick", new String[]{"config", "chain-lightning-jump-range-blocks"});
+            assertTrue(sender.messages.getLast().contains("=5"));
+            for (String[] update : List.of(new String[]{"chain-lightning-base-damage", "10"},
+                    new String[]{"chain-lightning-cooldown-seconds", "3"}, new String[]{"chain-lightning-initial-range-blocks", "14"},
+                    new String[]{"chain-lightning-jump-range-blocks", "7"}, new String[]{"chain-lightning-additional-targets", "1"},
+                    new String[]{"chain-lightning-jump-multiplier", "0.25"})) {
+                fixture.command.execute(sender.port, "fantasystick", new String[]{"config", update[0], update[1]});
+                var response = fixture.tasks.poll(5, TimeUnit.SECONDS); assertNotNull(response); response.run();
+            }
+            var configured = registry.find("chain_lightning").orElseThrow(); assertEquals(new BigDecimal("10"), configured.parameters().get("base-damage"));
+            assertEquals(java.time.Duration.ofSeconds(3), configured.cooldown());
+            assertEquals(0, new BigDecimal("14").compareTo(configured.parameters().get("initial-range")));
+            assertEquals(0, new BigDecimal("7").compareTo(configured.parameters().get("jump-range")));
+            assertEquals(new BigDecimal("1"), configured.parameters().get("additional-targets"));
+            assertEquals(new BigDecimal("0.25"), configured.parameters().get("jump-multiplier"));
+            fixture.command.execute(sender.port, "fantasystick", new String[]{"config", "chain-lightning-jump-range-blocks", "0"});
+            assertTrue(sender.messages.getLast().contains("invalid"));
+            fixture.command.execute(sender.port, "fantasystick", new String[]{"config", "chain-lightning-jump-range-blocks", "7", "extra"});
+            assertTrue(sender.messages.getLast().contains("Usage"));
+            fixture.plugin.setEnabled(false); fixture.plugin.setEnabled(true);
+            var reloaded = (AbilityRegistry) FantasyStickLifecycleNativeTest.Fixture.field(fixture.plugin, "abilityRegistry");
+            var saved = reloaded.find("chain_lightning").orElseThrow();
+            assertEquals(0, new BigDecimal("7").compareTo(saved.parameters().get("jump-range")));
+            assertEquals(new BigDecimal("0.25"), saved.parameters().get("jump-multiplier"));
+            assertEquals(java.time.Duration.ofSeconds(3), saved.cooldown());
+        }
+    }
+
+    private static void nativeDamage(FantasyStickLifecycleNativeTest.Fixture fixture, LivingEntity target, Map<UUID, Double> damage) {
+        doAnswer(call -> { double amount = call.getArgument(0); DamageSource source = call.getArgument(1);
+            var event = new org.bukkit.event.entity.EntityDamageByEntityEvent(source.getCausingEntity(), target,
+                EntityDamageEvent.DamageCause.LIGHTNING, source, amount);
+            fixture.dispatcher.accept(event); if (!event.isCancelled()) damage.put(target.getUniqueId(), event.getFinalDamage()); return null;
+        }).when(target).damage(anyDouble(), any(DamageSource.class));
+    }
+    private static void use(FantasyStickLifecycleNativeTest.Fixture fixture, FantasyStickLifecycleNativeTest.Actor actor) {
+        actor.core.inventory.getInventory().setSelectedSlot(2);
+        fixture.dispatcher.accept(new org.bukkit.event.player.PlayerInteractEvent(actor.player,
+            org.bukkit.event.block.Action.RIGHT_CLICK_AIR, actor.core.inventory.getItem(2), null,
+            org.bukkit.block.BlockFace.SELF, org.bukkit.inventory.EquipmentSlot.HAND));
+    }
+    private static void drain(FantasyStickLifecycleNativeTest.Fixture fixture, int count) throws Exception {
+        for (int index = 0; index < count; index++) PartyBookNativeTest.drain(fixture);
+    }
+    private static net.minecraft.network.chat.ClickEvent.Custom button(
+            FantasyStickLifecycleNativeTest.Actor actor, String label, String ability) {
+        var book = org.bukkit.craftbukkit.inventory.CraftItemStack.asNMSCopy(actor.books.getLast())
+            .get(net.minecraft.core.component.DataComponents.WRITTEN_BOOK_CONTENT); assertNotNull(book);
+        for (var page : book.pages()) { var found = button(page.raw(), label, ability); if (found != null) return found; }
+        throw new AssertionError("Missing " + label + " for " + ability);
+    }
+    private static net.minecraft.network.chat.ClickEvent.Custom button(
+            net.minecraft.network.chat.Component component, String label, String ability) {
+        if (component.getString().equals(label)
+                && component.getStyle().getClickEvent() instanceof net.minecraft.network.chat.ClickEvent.Custom custom
+                && custom.payload().orElse(null) instanceof net.minecraft.nbt.StringTag payload
+                && payload.value().contains(":" + ability)) return custom;
+        for (var child : component.getSiblings()) { var found = button(child, label, ability); if (found != null) return found; }
+        return null;
+    }
+    private static void prepareCaster(Path directory, FantasyStickLifecycleNativeTest.Actor actor, boolean learned) throws Exception {
+        java.nio.file.Files.createDirectories(directory); var repository = new YamlCharacterRepository(directory);
+        var old = repository.load(actor.core.record.id()).orElseThrow(); var stats = new EnumMap<>(old.stats());
+        stats.put(Stat.INT, BigInteger.valueOf(20)); stats.put(Stat.DEX, BigInteger.valueOf(12));
+        repository.replace(new CharacterRecord(old.id(), old.name(), old.revision().add(BigInteger.ONE), stats,
+            old.level(), old.experience(), BigInteger.valueOf(learned ? 39 : 40), old.health(),
+            learned ? Set.of("chain_lightning") : old.learned(), learned ? List.of("chain_lightning", "", "", "", "", "", "") : old.loadout(),
+            old.cooldowns(), old.restrictedKills(), false, null, null), old.revision());
+    }
+
+    private static AbilityExecution execution(Player source, EquipmentSessions.Active active, LivingEntity target) {
+        var execution = mock(AbilityExecution.class); var input = mock(ControlInput.class);
+        when(input.player()).thenReturn(source); when(input.session()).thenReturn(active); when(input.target()).thenReturn(target);
+        when(execution.input()).thenReturn(input); when(execution.stillCurrent()).thenReturn(true);
+        var record = new games.dmg.fantasystick.crafting.CharacterFactory().create(games.dmg.fantasystick.progression.ProgressionRules.defaults());
+        var stats = new EnumMap<>(record.stats()); stats.put(Stat.INT, BigInteger.valueOf(20));
+        when(execution.character()).thenReturn(new CharacterRecord(active.character(), record.name(), record.revision(), stats,
+            record.level(), record.experience(), record.unspentPoints(), record.health(), Set.of("chain_lightning"),
+            List.of("chain_lightning", "", "", "", "", "", ""), record.cooldowns(), record.restrictedKills(), false, null, null));
+        return execution;
+    }
+    private static void locate(LivingEntity entity, org.bukkit.World world, UUID id, double x) {
+        when(entity.getUniqueId()).thenReturn(id); when(entity.getLocation()).thenReturn(new Location(world, x, 64, 0));
+    }
+}

src/nativeTest/java/games/dmg/fantasystick/CharacterBookNativeTest.java

@@ -72,11 +72,108 @@ class CharacterBookNativeTest {
             assertEquals(1, a.books.size());
             String rendered = text(a.books.getFirst()).replace("\n", "");
             for (String expected : java.util.List.of("Level: 30", "XP: MAX", "Unspent points: 9", "STR: " + strength,
-                    "revive", "unavailable_saved_id")) assertTrue(rendered.contains(expected), expected);
+                    "Revive", "unavailable_saved_id")) assertTrue(rendered.contains(expected), expected);
             assertEquals(saved, characters(f).find(old.id()).get(5, TimeUnit.SECONDS).orElseThrow());
         }
     }
 
+    @Test void bookPurchasePersistsConAndPointsAndAppliesTheAcknowledgedNativeHealthGain() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var a = new FantasyStickLifecycleNativeTest.Actor(data);
+            f.players.put(a.core.id, a.player); f.activate(a);
+            a.player.setHealth(5);
+            PartyBookNativeTest.open(f, a);
+            var purchase = PartyBookNativeTest.button(a, "[+1 CON]");
+            PartyBookNativeTest.click(f, a, purchase);
+            PartyBookNativeTest.drain(f); PartyBookNativeTest.drain(f);
+            var saved = characters(f).find(a.core.record.id()).get(5, TimeUnit.SECONDS).orElseThrow();
+            assertEquals(java.math.BigInteger.ONE, saved.stats().get(games.dmg.fantasystick.progression.Stat.CON));
+            assertEquals(java.math.BigInteger.valueOf(39), saved.unspentPoints());
+            assertEquals(0, saved.health().compareTo(java.math.BigDecimal.valueOf(6)));
+            assertEquals(11, a.maximumHealth.getValue());
+            assertEquals(6, a.player.getHealth());
+            assertTrue(PartyBookNativeTest.text(a).contains("CON: 1"));
+            assertTrue(PartyBookNativeTest.text(a).contains("Unspent points: 39"));
+            PartyBookNativeTest.click(f, a, purchase);
+            PartyBookNativeTest.drain(f);
+            assertEquals(saved, characters(f).find(a.core.record.id()).get(5, TimeUnit.SECONDS).orElseThrow(),
+                "A rendered purchase action is single-use");
+        }
+    }
+
+    @Test void conPurchaseKeepsItsOwnMaximumAndOneTimeGainDespiteExternalModifiers() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var a = new FantasyStickLifecycleNativeTest.Actor(data);
+            f.players.put(a.core.id, a.player);
+            var before = new net.minecraft.world.entity.ai.attributes.AttributeModifier(
+                net.minecraft.resources.Identifier.fromNamespaceAndPath("test", "before_purchase"), 5,
+                net.minecraft.world.entity.ai.attributes.AttributeModifier.Operation.ADD_VALUE);
+            a.maximumHealth.addTransientModifier(before);
+            f.activate(a); assertEquals(10, a.maximumHealth.getValue());
+            var during = new net.minecraft.world.entity.ai.attributes.AttributeModifier(
+                net.minecraft.resources.Identifier.fromNamespaceAndPath("test", "during_purchase"), 100,
+                net.minecraft.world.entity.ai.attributes.AttributeModifier.Operation.ADD_VALUE);
+            a.maximumHealth.addPermanentModifier(during);
+            assertEquals(10, a.maximumHealth.getValue());
+            a.player.setHealth(5);
+            PartyBookNativeTest.open(f, a);
+            PartyBookNativeTest.click(f, a, PartyBookNativeTest.button(a, "[+1 CON]"));
+            PartyBookNativeTest.drain(f); PartyBookNativeTest.drain(f);
+            assertEquals(11, a.maximumHealth.getValue()); assertEquals(6, a.player.getHealth());
+            assertEquals(java.util.Set.of(before, during), a.maximumHealth.getModifiers());
+            a.core.inventory.setItemInOffHand(null); f.changed(a); f.awaitCharacterAndReceipt(a);
+            assertEquals(java.util.Set.of(before, during), a.maximumHealth.getModifiers());
+            var saved = characters(f).find(a.core.record.id()).get(5, TimeUnit.SECONDS).orElseThrow();
+            assertEquals(java.math.BigInteger.ONE, saved.stats().get(games.dmg.fantasystick.progression.Stat.CON));
+            assertEquals(0, saved.health().compareTo(java.math.BigDecimal.valueOf(6)));
+        }
+    }
+
+    @Test void failedPurchaseChangesNothingAndAcknowledgedStatsSurviveReopenTransferAndReload() throws Exception {
+        java.nio.file.Files.writeString(data.resolve("config.yml"), "character-swap-cooldown-seconds: 0\n");
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var a = new FantasyStickLifecycleNativeTest.Actor(data);
+            var b = new FantasyStickLifecycleNativeTest.Actor(data);
+            f.players.put(a.core.id, a.player); f.players.put(b.core.id, b.player); f.activate(a);
+            a.player.setHealth(5);
+            PartyBookNativeTest.open(f, a);
+            var rejected = PartyBookNativeTest.button(a, "[+1 STR]");
+            var before = characters(f).find(a.core.record.id()).get(5, TimeUnit.SECONDS).orElseThrow();
+            try (var channel = java.nio.channels.FileChannel.open(data.resolve("characters/.records.lock"), java.nio.file.StandardOpenOption.WRITE);
+                 var lock = channel.lock()) {
+                assertTrue(lock.isValid());
+                PartyBookNativeTest.click(f, a, rejected);
+                PartyBookNativeTest.drain(f); PartyBookNativeTest.drain(f);
+            }
+            assertEquals(before, characters(f).find(a.core.record.id()).get(5, TimeUnit.SECONDS).orElseThrow());
+            assertEquals(5, a.player.getHealth()); assertEquals(10, a.maximumHealth.getValue());
+            assertTrue(a.messages.stream().anyMatch(message -> message.contains("could not be saved")));
+            PartyBookNativeTest.click(f, a, rejected); PartyBookNativeTest.drain(f);
+            assertEquals(before, characters(f).find(a.core.record.id()).get(5, TimeUnit.SECONDS).orElseThrow());
+
+            PartyBookNativeTest.open(f, a);
+            PartyBookNativeTest.click(f, a, PartyBookNativeTest.button(a, "[+1 STR]"));
+            PartyBookNativeTest.drain(f); PartyBookNativeTest.drain(f);
+            var saved = characters(f).find(a.core.record.id()).get(5, TimeUnit.SECONDS).orElseThrow();
+            assertEquals(java.math.BigInteger.ONE, saved.stats().get(games.dmg.fantasystick.progression.Stat.STR));
+            assertEquals(java.math.BigInteger.valueOf(39), saved.unspentPoints());
+            var sheet = a.core.inventory.getItemInOffHand().clone();
+            a.core.inventory.setItemInOffHand(null); f.changed(a); f.awaitCharacterAndReceipt(a);
+            b.core.inventory.setItemInOffHand(sheet); f.activate(b);
+            PartyBookNativeTest.open(f, b);
+            assertTrue(PartyBookNativeTest.text(b).contains("STR: 1"));
+            assertTrue(PartyBookNativeTest.text(b).contains("Unspent points: 39"));
+            f.plugin.setEnabled(false); f.awaitWorkers();
+            f.players.clear(); f.plugin.setEnabled(true); f.players.put(b.core.id, b.player); f.reenter(b);
+            PartyBookNativeTest.open(f, b);
+            assertTrue(PartyBookNativeTest.text(b).contains("STR: 1"));
+            assertEquals(saved.stats(), characters(f).find(saved.id()).get(5, TimeUnit.SECONDS).orElseThrow().stats());
+        }
+    }
+
     @Test void nativePagesKeepLargeNumbersUnicodeNamesAndUnknownAbilitiesReadableAndComplete() throws Exception {
         try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
             f.plugin.setEnabled(true);
@@ -121,7 +218,7 @@ class CharacterBookNativeTest {
             var stats = new java.util.EnumMap<games.dmg.fantasystick.progression.Stat, java.math.BigInteger>(games.dmg.fantasystick.progression.Stat.class);
             stats.putAll(old.stats()); stats.put(games.dmg.fantasystick.progression.Stat.STR, new java.math.BigInteger(digits));
             var saved = new games.dmg.fantasystick.persistence.CharacterRecord(old.id(), old.name(), old.revision().add(java.math.BigInteger.ONE),
-                stats, old.level(), old.experience(), old.unspentPoints(), old.health(), old.learned(), old.loadout(), old.cooldowns(), false, null, null);
+                stats, old.level(), old.experience(), java.math.BigInteger.ZERO, old.health(), old.learned(), old.loadout(), old.cooldowns(), false, null, null);
             new games.dmg.fantasystick.persistence.YamlCharacterRepository(data).replace(saved, old.revision());
             byte[] bytes = Files.readAllBytes(data.resolve("characters").resolve(saved.id() + ".yml"));
             click(f, a); drainReads(f); runQueued(f);
@@ -166,7 +263,7 @@ class CharacterBookNativeTest {
             f.players.put(a.core.id, a.player); f.players.put(b.core.id, b.player); f.activate(a);
             click(f, a); drainReads(f); // Old holder has a queued result, not a delivered book.
             a.core.inventory.setItemInOffHand(null); f.changed(a);
-            f.receipts().find(a.core.id).toCompletableFuture().get(5, TimeUnit.SECONDS);
+            f.awaitCharacterAndReceipt(a);
             var renamed = characters(f).renameCharacter(a.core.record.id(), "Traded 雪 character").get(5, TimeUnit.SECONDS).orElseThrow();
             runQueued(f); assertTrue(a.books.isEmpty());
             b.core.inventory.setItemInOffHand(new games.dmg.fantasystick.items.CharacterSheets().create(renamed));
@@ -210,6 +307,123 @@ class CharacterBookNativeTest {
         }
     }
 
+    @Test void linkedBookOrdersOverviewActiveIndexAndConciseAbilityDetailsWithAutomaticAssignment() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var a = new FantasyStickLifecycleNativeTest.Actor(data);
+            var repository = new games.dmg.fantasystick.persistence.YamlCharacterRepository(data);
+            var old = repository.load(a.core.record.id()).orElseThrow();
+            var stats = new java.util.EnumMap<>(old.stats());
+            stats.put(games.dmg.fantasystick.progression.Stat.INT, java.math.BigInteger.valueOf(12));
+            var eligible = new games.dmg.fantasystick.persistence.CharacterRecord(old.id(), old.name(), old.revision().add(java.math.BigInteger.ONE),
+                stats, old.level(), old.experience(), old.unspentPoints(), old.health(), old.learned(), old.loadout(),
+                old.cooldowns(), old.restrictedKills(), false, null, null);
+            repository.replace(eligible, old.revision());
+            f.players.put(a.core.id, a.player); f.activate(a);
+            PartyBookNativeTest.open(f, a);
+
+            var pages = nativePages(a);
+            assertTrue(pages.size() <= 100, "Keep each native linked-book view bounded");
+            assertTrue(pages.get(0).getString().contains("STR: 0 [+1 STR]"));
+            assertTrue(pages.get(0).getString().contains("INT: 12 [+1 INT]"));
+            assertTrue(pages.get(1).getString().startsWith("Active abilities"));
+            assertTrue(pages.get(1).getString().contains("3: No Ability"));
+            int index = firstPageStarting(pages, "Ability index");
+            assertTrue(index > 1);
+            var indexedNames = new java.util.ArrayList<String>();
+            int partyPage = firstPageStarting(pages, "Party");
+            for (int page = index; page < pages.size() && pages.get(page).getString().startsWith("Ability index"); page++) {
+                for (String line : pages.get(page).getString().split("\\n")) if (!line.isBlank() && !line.equals("Ability index")) {
+                    indexedNames.add(line);
+                    var jump = changePage(pages.get(page), line);
+                    assertNotNull(jump, line);
+                    assertTrue(jump.page() - 1 < partyPage, "Ability details must precede party controls");
+                }
+            }
+            var sortedNames = indexedNames.stream().sorted().toList();
+            assertEquals(sortedNames, indexedNames);
+            assertEquals(20, indexedNames.size());
+            var fireballJump = changePage(pages.get(index), "Fireball");
+            assertNotNull(fireballJump);
+            var detail = pages.get(fireballJump.page() - 1);
+            assertTrue(detail.getString().startsWith("Fireball\nINT 12\n[Learn]"), detail.getString());
+            assertFalse(text(a.books.getLast()).contains("Cost:"));
+            assertFalse(text(a.books.getLast()).contains("Requires:"));
+            assertTrue(text(a.books.getLast()).contains("Shield Bash\nSTR 12, CON 12"));
+            assertFalse(detail.getString().contains("Icon:"));
+            assertFalse(text(a.books.getLast()).contains("Assign ability"));
+            assertFalse(text(a.books.getLast()).contains("[3]"));
+
+            PartyBookNativeTest.click(f, a, PartyBookNativeTest.button(a, "[Learn]"));
+            PartyBookNativeTest.drain(f); PartyBookNativeTest.drain(f);
+            var saved = characters(f).find(a.core.record.id()).get(5, TimeUnit.SECONDS).orElseThrow();
+            assertEquals("fireball", saved.loadout().get(0));
+            var refreshed = nativePages(a);
+            assertTrue(refreshed.get(1).getString().contains("3: Fireball"));
+            var activeJump = changePage(refreshed.get(1), "Fireball");
+            assertNotNull(activeJump);
+            assertTrue(refreshed.get(activeJump.page() - 1).getString().startsWith("Fireball\nINT 12\n[Unlearn]"));
+        }
+    }
+
+    @Test void unlearnAndRelearnReordersIntoLowestOpenSlotsWhileFullLoadoutsRefuse() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var a = new FantasyStickLifecycleNativeTest.Actor(data);
+            var repository = new games.dmg.fantasystick.persistence.YamlCharacterRepository(data);
+            var old = repository.load(a.core.record.id()).orElseThrow();
+            var stats = new java.util.EnumMap<>(old.stats());
+            for (var stat : games.dmg.fantasystick.progression.Stat.values()) stats.put(stat, java.math.BigInteger.valueOf(100));
+            var prepared = new games.dmg.fantasystick.persistence.CharacterRecord(old.id(), old.name(), old.revision().add(java.math.BigInteger.ONE),
+                stats, old.level(), old.experience(), java.math.BigInteger.TEN, old.health(),
+                java.util.Set.of("unknown_saved", "orphan_unknown"), java.util.List.of("unknown_saved", "", "", "", "", "", ""),
+                old.cooldowns(), old.restrictedKills(), false, null, null);
+            repository.replace(prepared, old.revision());
+            f.players.put(a.core.id, a.player); f.activate(a); PartyBookNativeTest.open(f, a);
+            assertTrue(PartyBookNativeTest.text(a).contains("orphan_unknown"));
+
+            mutate(f, a, "[Learn]", "fireball");
+            mutate(f, a, "[Learn]", "frost_shard");
+            mutate(f, a, "[Unlearn]", "fireball");
+            mutate(f, a, "[Unlearn]", "frost_shard");
+            mutate(f, a, "[Learn]", "frost_shard");
+            mutate(f, a, "[Learn]", "fireball");
+            var reordered = characters(f).find(a.core.record.id()).get(5, TimeUnit.SECONDS).orElseThrow();
+            assertEquals(java.util.List.of("unknown_saved", "frost_shard", "fireball", "", "", "", ""), reordered.loadout());
+            assertTrue(reordered.learned().contains("orphan_unknown"));
+
+            var fullActor = new FantasyStickLifecycleNativeTest.Actor(data);
+            var fullOld = repository.load(fullActor.core.record.id()).orElseThrow();
+            var fullStats = new java.util.EnumMap<>(fullOld.stats());
+            for (var stat : games.dmg.fantasystick.progression.Stat.values()) fullStats.put(stat, java.math.BigInteger.valueOf(100));
+            var ids = java.util.List.of("unknown_0", "unknown_1", "unknown_2", "unknown_3", "unknown_4", "unknown_5", "unknown_6");
+            var full = new games.dmg.fantasystick.persistence.CharacterRecord(fullOld.id(), fullOld.name(), fullOld.revision().add(java.math.BigInteger.ONE),
+                fullStats, fullOld.level(), fullOld.experience(), java.math.BigInteger.TEN, fullOld.health(), java.util.Set.copyOf(ids), ids,
+                fullOld.cooldowns(), fullOld.restrictedKills(), false, null, null);
+            repository.replace(full, fullOld.revision());
+            f.players.put(fullActor.core.id, fullActor.player); f.activate(fullActor); PartyBookNativeTest.open(f, fullActor);
+            assertTrue(PartyBookNativeTest.text(fullActor).contains("Unavailable: slots"));
+            assertNull(abilityButtonOrNull(fullActor, "[Learn]", "fireball"));
+            assertEquals(full, characters(f).find(full.id()).get(5, TimeUnit.SECONDS).orElseThrow());
+        }
+    }
+
+    @Test void overviewHidesEveryStatActionWhenNoPointsRemain() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var a = new FantasyStickLifecycleNativeTest.Actor(data);
+            var repository = new games.dmg.fantasystick.persistence.YamlCharacterRepository(data);
+            var old = repository.load(a.core.record.id()).orElseThrow();
+            var noPoints = new games.dmg.fantasystick.persistence.CharacterRecord(old.id(), old.name(), old.revision().add(java.math.BigInteger.ONE),
+                old.stats(), old.level(), old.experience(), java.math.BigInteger.ZERO, old.health(), old.learned(), old.loadout(),
+                old.cooldowns(), old.restrictedKills(), false, null, null);
+            repository.replace(noPoints, old.revision());
+            f.players.put(a.core.id, a.player); f.activate(a);
+            PartyBookNativeTest.open(f, a);
+            assertFalse(nativePages(a).get(0).getString().contains("[+1"));
+        }
+    }
+
     @Test void bookAdapterIgnoresOtherControlsAndNativeItemVetoes() throws Exception {
         try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
             f.plugin.setEnabled(true);
@@ -224,6 +438,51 @@ class CharacterBookNativeTest {
         }
     }
 
+    private static void mutate(FantasyStickLifecycleNativeTest.Fixture fixture,
+                               FantasyStickLifecycleNativeTest.Actor actor, String label, String ability) throws Exception {
+        PartyBookNativeTest.click(fixture, actor, abilityButtonOrNull(actor, label, ability));
+        PartyBookNativeTest.drain(fixture); PartyBookNativeTest.drain(fixture);
+    }
+    private static net.minecraft.network.chat.ClickEvent.Custom abilityButtonOrNull(
+            FantasyStickLifecycleNativeTest.Actor actor, String label, String ability) {
+        for (var page : nativePages(actor)) {
+            var found = abilityButtonOrNull(page, label, ability);
+            if (found != null) return found;
+        }
+        return null;
+    }
+    private static net.minecraft.network.chat.ClickEvent.Custom abilityButtonOrNull(
+            net.minecraft.network.chat.Component component, String label, String ability) {
+        if (component.getString().equals(label)
+                && component.getStyle().getClickEvent() instanceof net.minecraft.network.chat.ClickEvent.Custom custom
+                && custom.payload().orElse(null) instanceof net.minecraft.nbt.StringTag payload
+                && payload.value().contains(":" + ability)) return custom;
+        for (var child : component.getSiblings()) {
+            var found = abilityButtonOrNull(child, label, ability);
+            if (found != null) return found;
+        }
+        return null;
+    }
+    private static java.util.List<net.minecraft.network.chat.Component> nativePages(FantasyStickLifecycleNativeTest.Actor actor) {
+        var content = org.bukkit.craftbukkit.inventory.CraftItemStack.asNMSCopy(actor.books.getLast())
+            .get(net.minecraft.core.component.DataComponents.WRITTEN_BOOK_CONTENT);
+        assertNotNull(content);
+        return content.pages().stream().map(page -> page.raw()).toList();
+    }
+    private static int firstPageStarting(java.util.List<net.minecraft.network.chat.Component> pages, String prefix) {
+        for (int index = 0; index < pages.size(); index++) if (pages.get(index).getString().startsWith(prefix)) return index;
+        throw new AssertionError("Missing page " + prefix);
+    }
+    private static net.minecraft.network.chat.ClickEvent.ChangePage changePage(net.minecraft.network.chat.Component component,
+                                                                                String label) {
+        if (component.getString().equals(label)
+                && component.getStyle().getClickEvent() instanceof net.minecraft.network.chat.ClickEvent.ChangePage page) return page;
+        for (var child : component.getSiblings()) {
+            var found = changePage(child, label);
+            if (found != null) return found;
+        }
+        return null;
+    }
     private static String text(org.bukkit.inventory.ItemStack book) {
         var content = org.bukkit.craftbukkit.inventory.CraftItemStack.asNMSCopy(book)
             .get(net.minecraft.core.component.DataComponents.WRITTEN_BOOK_CONTENT);

src/nativeTest/java/games/dmg/fantasystick/CharacterSheetRecipeBookNativeTest.java

@@ -0,0 +1,154 @@
+package games.dmg.fantasystick;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.*;
+
+import games.dmg.fantasystick.items.CharacterSheets;
+import java.util.ArrayList;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Optional;
+import java.util.OptionalInt;
+import org.bukkit.Bukkit;
+import org.bukkit.Material;
+import org.bukkit.Server;
+import org.bukkit.craftbukkit.inventory.CraftItemFactory;
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
+import org.bukkit.craftbukkit.inventory.CraftRecipe;
+import org.bukkit.craftbukkit.util.CraftMagicNumbers;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.plugin.PluginManager;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+/** Pinned Purpur recipe-book persistence and placement without starting a listening server/client. */
+class CharacterSheetRecipeBookNativeTest {
+    private static Server previousServer;
+    private static Server server;
+
+    @BeforeAll static void bootstrap() throws Exception {
+        NativeRuntime.bootstrap(); previousServer = Bukkit.getServer(); server = mock(Server.class); setServer(server);
+    }
+    @BeforeEach void configure() {
+        reset(server);
+        when(server.getItemFactory()).thenAnswer(call -> CraftItemFactory.instance());
+        when(server.getUnsafe()).thenReturn(CraftMagicNumbers.INSTANCE);
+        when(server.isPrimaryThread()).thenReturn(true);
+    }
+    @AfterAll static void restore() throws Exception { setServer(previousServer); }
+    private static void setServer(Server value) throws Exception {
+        var field = Bukkit.class.getDeclaredField("server"); field.setAccessible(true); field.set(null, value);
+    }
+
+    @Test void nativeBookAwardsOneMiscHighlightAndPreservesItWithUnrelatedState() {
+        var bukkit = new CharacterSheets().recipe(); var nativeRecipe = nativeRecipe(bukkit); var key = key();
+        var holder = new net.minecraft.world.item.crafting.RecipeHolder<>(key, nativeRecipe);
+        var events = new ArrayList<org.bukkit.event.Event>(); var manager = mock(PluginManager.class);
+        doAnswer(call -> { events.add(call.getArgument(0)); return null; }).when(manager).callEvent(any());
+        when(server.getPluginManager()).thenReturn(manager);
+        var book = new Book((requested, consumer) -> consumer.accept(new net.minecraft.world.item.crafting.display.RecipeDisplayEntry(
+            new net.minecraft.world.item.crafting.display.RecipeDisplayId(7), nativeRecipe.display().getFirst(),
+            OptionalInt.empty(), nativeRecipe.recipeBookCategory(), Optional.of(nativeRecipe.placementInfo().ingredients()))));
+        var player = mock(net.minecraft.server.level.ServerPlayer.class);
+        when(player.getBukkitEntity()).thenReturn(mock(org.bukkit.craftbukkit.entity.CraftPlayer.class));
+        when(player.getAdvancements()).thenReturn(mock(net.minecraft.server.PlayerAdvancements.class));
+
+        assertEquals(1, book.addRecipes(List.of(holder), player));
+        assertEquals(0, book.addRecipes(List.of(holder), player));
+        assertTrue(book.contains(key));
+        assertEquals(List.of(key), book.pack().highlight());
+        assertEquals(net.minecraft.world.item.crafting.CraftingBookCategory.MISC, nativeRecipe.category());
+        assertEquals(1, events.size());
+        var event = assertInstanceOf(org.bukkit.event.player.PlayerRecipeDiscoverEvent.class, events.getFirst());
+        assertTrue(event.shouldShowNotification());
+
+        var unrelated = nativeKey(new org.bukkit.NamespacedKey("minecraft", "stick"));
+        book.add(unrelated); book.highlight(unrelated);
+        book.setBookSetting(net.minecraft.world.inventory.RecipeBookType.CRAFTING, true, true);
+        var tag = net.minecraft.stats.ServerRecipeBook.Packed.CODEC.encodeStart(net.minecraft.nbt.NbtOps.INSTANCE, book.pack()).getOrThrow();
+        var packed = net.minecraft.stats.ServerRecipeBook.Packed.CODEC.parse(net.minecraft.nbt.NbtOps.INSTANCE, tag).getOrThrow();
+        var restored = new Book(); restored.loadUntrusted(packed, ignored -> true);
+        assertTrue(restored.contains(key)); assertTrue(restored.contains(unrelated));
+        assertEquals(new LinkedHashSet<>(packed.highlight()), new LinkedHashSet<>(restored.pack().highlight()));
+        assertTrue(restored.isOpen(net.minecraft.world.inventory.RecipeBookType.CRAFTING));
+        assertTrue(restored.isFiltering(net.minecraft.world.inventory.RecipeBookType.CRAFTING));
+        int known = restored.pack().known().size(); int highlighted = restored.pack().highlight().size();
+        restored.add(key);
+        assertEquals(known, restored.pack().known().size()); assertEquals(highlighted, restored.pack().highlight().size());
+    }
+
+    @Test void nativeAutofillPlacesExactIngredientsAndPreviewCannotMintACharacter() {
+        var sheets = new CharacterSheets(); var bukkit = sheets.recipe(); var nativeRecipe = nativeRecipe(bukkit);
+        var holder = new net.minecraft.world.item.crafting.RecipeHolder<>(key(), nativeRecipe);
+        var player = mock(net.minecraft.world.entity.player.Player.class);
+        when(player.level()).thenReturn(mock(net.minecraft.world.level.Level.class));
+        when(player.getBukkitEntity()).thenReturn(mock(org.bukkit.craftbukkit.entity.CraftPlayer.class));
+        var inventory = new net.minecraft.world.entity.player.Inventory(player, new net.minecraft.world.entity.EntityEquipment());
+        when(player.getInventory()).thenReturn(inventory);
+        var ingredients = List.of(Material.STICK, Material.PAPER, Material.FEATHER, Material.INK_SAC);
+        for (int index = 0; index < ingredients.size(); index++) inventory.setItem(index,
+            CraftItemStack.asNMSCopy(new ItemStack(ingredients.get(index))));
+        var unrelated = new ItemStack(Material.DIAMOND, 7); inventory.setItem(20, CraftItemStack.asNMSCopy(unrelated));
+        var grid = new net.minecraft.world.inventory.TransientCraftingContainer(
+            mock(net.minecraft.world.inventory.AbstractContainerMenu.class), 3, 3, player);
+        grid.setItem(0, CraftItemStack.asNMSCopy(new ItemStack(Material.DIRT, 3)));
+        var slots = java.util.stream.IntStream.range(0, 9)
+            .mapToObj(slot -> new net.minecraft.world.inventory.Slot(grid, slot, 0, 0)).toList();
+        var access = new net.minecraft.recipebook.ServerPlaceRecipe.CraftingMenuAccess<net.minecraft.world.item.crafting.ShapelessRecipe>() {
+            @Override public void fillCraftSlotsStackedContents(net.minecraft.world.entity.player.StackedItemContents contents) {
+                grid.fillStackedContents(contents);
+            }
+            @Override public void clearCraftingContent() { grid.clearContent(); }
+            @Override public boolean recipeMatches(net.minecraft.world.item.crafting.RecipeHolder<net.minecraft.world.item.crafting.ShapelessRecipe> candidate) {
+                return candidate.value().matches(input(grid), mock(net.minecraft.world.level.Level.class));
+            }
+        };
+
+        var action = net.minecraft.recipebook.ServerPlaceRecipe.placeRecipe(
+            access, 3, 3, slots, slots, inventory, holder, false, false);
+
+        assertEquals(net.minecraft.world.inventory.RecipeBookMenu.PostPlaceAction.NOTHING, action);
+        assertTrue(nativeRecipe.matches(input(grid), mock(net.minecraft.world.level.Level.class)));
+        for (var material : ingredients) assertEquals(1, count(grid, material));
+        assertEquals(unrelated, CraftItemStack.asBukkitCopy(inventory.getItem(20)));
+        assertEquals(3, inventory.getNonEquipmentItems().stream().map(CraftItemStack::asBukkitCopy)
+            .filter(item -> item.getType() == Material.DIRT).mapToInt(ItemStack::getAmount).sum());
+        var before = grid.getItems().stream().map(CraftItemStack::asBukkitCopy).toList();
+        var preview = CraftItemStack.asBukkitCopy(nativeRecipe.assemble(input(grid)));
+        assertEquals(Material.PAPER, preview.getType()); assertTrue(sheets.identify(preview).isEmpty());
+        assertTrue(preview.getItemMeta().getPersistentDataContainer().isEmpty());
+        assertEquals(before, grid.getItems().stream().map(CraftItemStack::asBukkitCopy).toList());
+    }
+
+    private static net.minecraft.world.item.crafting.ShapelessRecipe nativeRecipe(org.bukkit.inventory.ShapelessRecipe recipe) {
+        var ingredients = recipe.getChoiceList().stream().map(choice -> CraftRecipe.toIngredient(choice, false)).toList();
+        return new net.minecraft.world.item.crafting.ShapelessRecipe(
+            new net.minecraft.world.item.crafting.Recipe.CommonInfo(true),
+            new net.minecraft.world.item.crafting.CraftingRecipe.CraftingBookInfo(
+                CraftRecipe.getCategory(recipe.getCategory()), recipe.getGroup()),
+            CraftItemStack.asTemplate(recipe.getResult()), ingredients);
+    }
+    private static net.minecraft.resources.ResourceKey<net.minecraft.world.item.crafting.Recipe<?>> key() {
+        return nativeKey(CharacterSheets.RECIPE);
+    }
+    private static net.minecraft.resources.ResourceKey<net.minecraft.world.item.crafting.Recipe<?>> nativeKey(org.bukkit.NamespacedKey key) {
+        return net.minecraft.resources.ResourceKey.create(net.minecraft.core.registries.Registries.RECIPE,
+            net.minecraft.resources.Identifier.fromNamespaceAndPath(key.getNamespace(), key.getKey()));
+    }
+    private static net.minecraft.world.item.crafting.CraftingInput input(net.minecraft.world.Container grid) {
+        return net.minecraft.world.item.crafting.CraftingInput.of(3, 3,
+            java.util.stream.IntStream.range(0, grid.getContainerSize()).mapToObj(grid::getItem).toList());
+    }
+    private static long count(net.minecraft.world.Container grid, Material material) {
+        return java.util.stream.IntStream.range(0, grid.getContainerSize()).mapToObj(grid::getItem)
+            .map(CraftItemStack::asBukkitCopy).filter(item -> item.getType() == material).mapToInt(ItemStack::getAmount).sum();
+    }
+    private static final class Book extends net.minecraft.stats.ServerRecipeBook {
+        Book() { this((key, consumer) -> { }); }
+        Book(DisplayResolver resolver) { super(resolver); }
+        void highlight(net.minecraft.resources.ResourceKey<net.minecraft.world.item.crafting.Recipe<?>> key) { highlight.add(key); }
+    }
+}

src/nativeTest/java/games/dmg/fantasystick/CharacterSheetsNativeTest.java

@@ -46,12 +46,16 @@ class CharacterSheetsNativeTest {
         meta.displayName(Component.text("Different presentation"));
         sheet.setItemMeta(meta);
         assertEquals(record.id(), sheets.identify(sheet).orElseThrow());
+        assertEquals(CharacterSheets.MODEL, sheet.getItemMeta().getItemModel());
+        var legacy = sheet.clone(); var legacyMeta = legacy.getItemMeta(); legacyMeta.setItemModel(null); legacy.setItemMeta(legacyMeta);
+        assertTrue(sheets.applyModel(legacy)); assertEquals(CharacterSheets.MODEL, legacy.getItemMeta().getItemModel());
         var fake = new ItemStack(Material.PAPER);
         var fakeMeta = fake.getItemMeta();
         fakeMeta.displayName(meta.displayName());
         fakeMeta.lore(meta.lore());
         fake.setItemMeta(fakeMeta);
         assertTrue(sheets.identify(fake).isEmpty());
+        assertFalse(sheets.applyModel(fake)); assertFalse(fake.getItemMeta().hasItemModel());
         assertTrue(sheets.identify(new ItemStack(Material.STICK)).isEmpty());
         assertTrue(sheets.identify(null).isEmpty());
         var version = new NamespacedKey("fantasystick", "sheet_version");
@@ -72,6 +76,7 @@ class CharacterSheetsNativeTest {
         var sheets = new CharacterSheets();
         var recipe = sheets.recipe();
         assertEquals(new NamespacedKey("fantasystick", "character_sheet"), recipe.getKey());
+        assertEquals(org.bukkit.inventory.recipe.CraftingBookCategory.MISC, recipe.getCategory());
         assertEquals(4, recipe.getChoiceList().size());
         assertTrue(recipe.getChoiceList().stream().allMatch(choice ->
             choice instanceof RecipeChoice.MaterialChoice materials && materials.getChoices().size() == 1));
@@ -84,6 +89,7 @@ class CharacterSheetsNativeTest {
             assertEquals(1, preview.getAmount());
             assertTrue(sheets.identify(preview).isEmpty());
             assertTrue(preview.getItemMeta().getPersistentDataContainer().isEmpty());
+            assertFalse(preview.getItemMeta().hasItemModel());
             assertEquals(List.of(Component.text("Character sheet:"), Component.text("Place in off hand"),
                 Component.text("to enter fantasy world.")), preview.getItemMeta().lore());
         }

src/nativeTest/java/games/dmg/fantasystick/CombatExperienceNativeTest.java

@@ -0,0 +1,263 @@
+package games.dmg.fantasystick;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.ArgumentMatchers.*;
+import static org.mockito.Mockito.*;
+
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.UUID;
+import org.bukkit.Location;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.EntityType;
+import org.bukkit.event.entity.EntityDamageByEntityEvent;
+import org.bukkit.event.entity.EntityDamageEvent.DamageCause;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+class CombatExperienceNativeTest {
+    @TempDir Path data;
+    @BeforeAll static void bootstrap() throws Exception { NativeRuntime.bootstrap(); }
+
+    @Test void packagedBasicAttackToBossDeathPersistsLevelAndUpdatesBookFeedbackExactlyOnce() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            assertTrue(f.order.contains("CombatExperience"));
+            var a = new FantasyStickLifecycleNativeTest.Actor(data);
+            f.players.put(a.core.id, a.player); f.activate(a);
+            var world = mock(org.bukkit.World.class); var worldId = UUID.randomUUID(); when(world.getUID()).thenReturn(worldId);
+            var target = mob(EntityType.WARDEN, new Location(world, 10, 65, -4));
+            doAnswer(call -> {
+                var source = mock(org.bukkit.damage.DamageSource.class);
+                when(source.getCausingEntity()).thenReturn(a.player);
+                when(source.getDirectEntity()).thenReturn(a.player);
+                var event = new EntityDamageByEntityEvent(a.player, target, DamageCause.ENTITY_ATTACK,
+                    source, (Double) call.getArgument(0));
+                f.dispatcher.accept(event); return null;
+            }).when(target).damage(anyDouble(), same(a.player));
+
+            a.core.inventory.getInventory().setSelectedSlot(1);
+            var attack = new io.papermc.paper.event.player.PrePlayerAttackEntityEvent(a.player, target, true);
+            f.dispatcher.accept(attack);
+            assertTrue(attack.isCancelled());
+            var source = mock(org.bukkit.damage.DamageSource.class);
+            var death = new org.bukkit.event.entity.EntityDeathEvent(target, source, new ArrayList<>(), 17);
+            f.dispatcher.accept(death);
+            PartyBookNativeTest.drain(f);
+
+            var storage = (games.dmg.fantasystick.persistence.CharacterStorage)
+                FantasyStickLifecycleNativeTest.Fixture.field(f.plugin, "characters");
+            var saved = storage.find(a.core.record.id()).get().orElseThrow();
+            PartyBookNativeTest.drain(f); // Deliver the post-commit main-thread acknowledgment and feedback.
+            assertEquals(java.math.BigInteger.valueOf(100), saved.experience());
+            assertEquals(2, saved.level());
+            assertEquals(java.math.BigInteger.valueOf(41), saved.unspentPoints());
+            assertEquals(17, death.getDroppedExp(), "Fantasy rewards never replace native Minecraft XP");
+            assertTrue(a.messages.stream().anyMatch(message -> message.contains("100") && message.contains("XP")));
+            assertTrue(a.messages.stream().anyMatch(message -> message.contains("Level 2")));
+            assertTrue(mockingDetails(a.world).getInvocations().stream().anyMatch(invocation ->
+                invocation.getMethod().getName().equals("spawnParticle")
+                    && java.util.Arrays.asList(invocation.getArguments()).contains(12)));
+            assertFalse(a.sounds.isEmpty());
+
+            a.core.inventory.getInventory().setSelectedSlot(0);
+            PartyBookNativeTest.open(f, a);
+            String book = PartyBookNativeTest.text(a);
+            assertTrue(book.contains("Level: 2")); assertTrue(book.contains("XP: 0/100"));
+
+            f.dispatcher.accept(new org.bukkit.event.entity.EntityDeathEvent(target, source, new ArrayList<>(), 17));
+            PartyBookNativeTest.drain(f);
+            assertEquals(saved, storage.find(a.core.record.id()).get().orElseThrow(), "One defeated target awards only once");
+        }
+    }
+
+    @Test void sharingProjectileExitPassiveExemptionAndPerCharacterRestrictedSpacingUseNativeEvents() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var a = new FantasyStickLifecycleNativeTest.Actor(data);
+            var b = new FantasyStickLifecycleNativeTest.Actor(data);
+            var c = new FantasyStickLifecycleNativeTest.Actor(data);
+            f.players.put(a.core.id, a.player); f.players.put(b.core.id, b.player); f.players.put(c.core.id, c.player);
+            f.activate(a); f.activate(b); f.activate(c);
+            var world = mock(org.bukkit.World.class); when(world.getUID()).thenReturn(UUID.randomUUID());
+
+            var first = mob(EntityType.ZOMBIE, new Location(world, 0, 64, 0));
+            hit(f, a.player, first, false);
+            die(f, first); settle(f);
+            assertEquals(java.math.BigInteger.TEN, record(f, a).experience());
+            assertEquals(java.math.BigInteger.ZERO, record(f, b).experience());
+
+            var near = mob(EntityType.BEE, new Location(world, 2, 64, 0)); // Neutral, regardless of aggression.
+            hit(f, a.player, near, false);
+            var arrow = PartyCombatNativeTest.projectile(f, b.player);
+            hit(f, arrow, near, false);
+            var ordinary = PartyCombatNativeTest.entity(org.bukkit.entity.Arrow.class);
+            hit(f, ordinary, near, false); // Ordinary sources never enter the fantasy denominator.
+            PartyCombatNativeTest.exit(f, b); // The arrow's originating character still owns its accepted contribution.
+            die(f, near); settle(f);
+            assertEquals(java.math.BigInteger.TEN, record(f, a).experience(), "Blocked share is lost rather than redistributed");
+            assertEquals(java.math.BigInteger.valueOf(5), record(f, b).experience(), "First restricted kill is eligible for this character");
+
+            var passive = mob(EntityType.COW, new Location(world, 2, 64, 0));
+            hit(f, a.player, passive, false);
+            hit(f, c.player, passive, false);
+            // b is now ordinary; its direct damage cannot enter the fantasy denominator.
+            hit(f, b.player, passive, false);
+            die(f, passive); settle(f);
+            assertEquals(java.math.BigInteger.valueOf(11), record(f, a).experience());
+            assertEquals(java.math.BigInteger.valueOf(5), record(f, b).experience());
+            assertEquals(java.math.BigInteger.ONE, record(f, c).experience(),
+                "A one-XP passive pool rounds up to one for every fantasy contributor");
+
+            var exact = mob(EntityType.ZOMBIE, new Location(world, 5, 64, 0));
+            hit(f, a.player, exact, false);
+            hit(f, a.player, exact, true); // Cancelled repeats do not create another contributor.
+            die(f, exact); settle(f);
+            assertEquals(java.math.BigInteger.valueOf(21), record(f, a).experience(),
+                "Passive kill did not reset history; exact three-block distance from blocked kill is eligible");
+            assertEquals(new java.math.BigDecimal("5.0"), record(f, a).restrictedKills().values().iterator().next().x());
+
+            var repeatedPassive = mob(EntityType.SHEEP, new Location(world, 2, 64, 0));
+            hit(f, a.player, repeatedPassive, false); die(f, repeatedPassive); settle(f);
+            assertEquals(java.math.BigInteger.valueOf(22), record(f, a).experience(), "Same-location passive kills remain eligible");
+        }
+    }
+
+    @Test void failedRewardSaveRetainsOneRetryableOperationWithoutReplayingTheTarget() {
+        var storage = mock(games.dmg.fantasystick.persistence.CharacterStorage.class);
+        var sessions = mock(games.dmg.fantasystick.session.EquipmentSessions.class);
+        var progression = games.dmg.fantasystick.progression.ProgressionRules.defaults();
+        var original = new games.dmg.fantasystick.crafting.CharacterFactory().create(progression);
+        var active = new games.dmg.fantasystick.session.EquipmentSessions.Active(UUID.randomUUID(), UUID.randomUUID(), original.id());
+        var attacker = mock(org.bukkit.entity.Player.class);
+        when(attacker.getUniqueId()).thenReturn(active.player());
+        when(sessions.active(active.player())).thenReturn(java.util.Optional.of(active));
+        when(sessions.current(active)).thenReturn(true);
+        when(storage.find(original.id())).thenReturn(java.util.concurrent.CompletableFuture.completedFuture(java.util.Optional.of(original)));
+        var failed = new java.util.concurrent.CompletableFuture<games.dmg.fantasystick.persistence.CharacterStorage.CombatAward>();
+        failed.completeExceptionally(new java.io.IOException("simulated write failure"));
+        var saved = new games.dmg.fantasystick.persistence.CharacterRecord(original.id(), original.name(), java.math.BigInteger.ONE,
+            original.stats(), original.level(), java.math.BigInteger.TEN, original.unspentPoints(), original.health(),
+            original.learned(), original.loadout(), original.cooldowns(), original.restrictedKills(), false, null, null);
+        var success = java.util.concurrent.CompletableFuture.completedFuture(
+            new games.dmg.fantasystick.persistence.CharacterStorage.CombatAward(
+                games.dmg.fantasystick.persistence.CharacterStorage.CombatAwardStatus.APPLIED, java.util.Optional.of(saved), 0));
+        var writes = new java.util.concurrent.atomic.AtomicInteger();
+        when(storage.awardCombatExperience(eq(original.id()), any(), eq(java.math.BigInteger.TEN), same(progression), any(), any()))
+            .thenAnswer(ignored -> writes.getAndIncrement() == 0 ? failed : success);
+        var failures = new ArrayList<games.dmg.fantasystick.party.CombatExperience.Failure>();
+        var service = new games.dmg.fantasystick.party.CombatExperience(storage, progression,
+            games.dmg.fantasystick.progression.CombatRewardRules.defaults(), sessions,
+            java.time.Clock.fixed(java.time.Instant.parse("2026-09-19T20:00:00Z"), java.time.ZoneOffset.UTC), Runnable::run,
+            ignored -> null, failures::add);
+        var world = mock(org.bukkit.World.class); when(world.getUID()).thenReturn(UUID.randomUUID());
+        var target = mob(EntityType.ZOMBIE, new Location(world, 0, 64, 0));
+        var damageSource = mock(org.bukkit.damage.DamageSource.class);
+        when(damageSource.getDirectEntity()).thenReturn(attacker); when(damageSource.getCausingEntity()).thenReturn(attacker);
+        service.damage(new EntityDamageByEntityEvent(attacker, target, DamageCause.ENTITY_ATTACK, damageSource, 1));
+        service.mobDeath(new org.bukkit.event.entity.EntityDeathEvent(target, damageSource, new ArrayList<>(), 0));
+        verify(storage, times(1)).awardCombatExperience(eq(original.id()), any(), any(), any(), any(), any());
+        assertEquals(1, failures.size());
+        service.retryPending();
+        verify(storage, times(2)).awardCombatExperience(eq(original.id()), any(), any(), any(), any(), any());
+        service.mobDeath(new org.bukkit.event.entity.EntityDeathEvent(target, damageSource, new ArrayList<>(), 0));
+        service.retryPending();
+        verify(storage, times(2)).awardCombatExperience(eq(original.id()), any(), any(), any(), any(), any());
+        service.close();
+    }
+
+    @Test void validatedConfiguredPoolAndZeroSpacingReachTheRegisteredRewardPath() throws Exception {
+        java.nio.file.Files.writeString(data.resolve("config.yml"),
+            "xp-per-level: 10\nordinary-xp: 25\nrestricted-kill-spacing-blocks: 0\n");
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var a = new FantasyStickLifecycleNativeTest.Actor(data); f.players.put(a.core.id, a.player); f.activate(a);
+            var world = mock(org.bukkit.World.class); when(world.getUID()).thenReturn(UUID.randomUUID());
+            for (int index = 0; index < 2; index++) {
+                var target = mob(EntityType.ZOMBIE, new Location(world, 0, 64, 0));
+                hit(f, a.player, target, false); die(f, target); settle(f);
+            }
+            assertEquals(java.math.BigInteger.valueOf(50), record(f, a).experience());
+            assertEquals(6, record(f, a).level());
+            assertEquals(java.math.BigInteger.valueOf(45), record(f, a).unspentPoints());
+            assertEquals(5, a.sounds.size(), "Every gained level has its own feedback sound");
+            for (int level = 2; level <= 6; level++) {
+                int expected = level;
+                assertTrue(a.messages.stream().anyMatch(message -> message.contains("Level " + expected)));
+            }
+        }
+    }
+
+    @Test void interceptedFantasyDefeatUsesVictimLevelPoolAndCancelledDamageCreatesNoCredit() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var a = new FantasyStickLifecycleNativeTest.Actor(data);
+            var b = new FantasyStickLifecycleNativeTest.Actor(data);
+            f.players.put(a.core.id, a.player); f.players.put(b.core.id, b.player);
+            f.activate(a); f.activate(b);
+            hit(f, a.player, b.player, true);
+            var source = mock(org.bukkit.damage.DamageSource.class);
+            var cancelled = new org.bukkit.event.entity.PlayerDeathEvent(b.player, source, new ArrayList<>(), 0,
+                net.kyori.adventure.text.Component.text("defeat"), true);
+            f.dispatcher.accept(cancelled); settle(f);
+            assertTrue(cancelled.isCancelled());
+            assertEquals(java.math.BigInteger.ZERO, record(f, a).experience(), "Cancelled damage never contributes");
+        }
+
+        var second = data.resolve("accepted"); java.nio.file.Files.createDirectories(second);
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(second)) {
+            f.plugin.setEnabled(true);
+            var a = new FantasyStickLifecycleNativeTest.Actor(second);
+            var b = new FantasyStickLifecycleNativeTest.Actor(second);
+            f.players.put(a.core.id, a.player); f.players.put(b.core.id, b.player);
+            f.activate(a); f.activate(b);
+            hit(f, a.player, b.player, false);
+            var source = mock(org.bukkit.damage.DamageSource.class);
+            var defeat = new org.bukkit.event.entity.PlayerDeathEvent(b.player, source, new ArrayList<>(), 0,
+                net.kyori.adventure.text.Component.text("defeat"), true);
+            f.dispatcher.accept(defeat); settle(f); settle(f);
+            assertTrue(defeat.isCancelled());
+            assertEquals(java.math.BigInteger.TEN, record(f, a).experience(), "Level-one fantasy defeat supplies a ten-XP pool");
+            assertTrue(record(f, b).dead());
+            f.dispatcher.accept(defeat); settle(f);
+            assertEquals(java.math.BigInteger.TEN, record(f, a).experience(), "Repeated intercepted callback cannot award twice");
+        }
+    }
+
+    private static EntityDamageByEntityEvent hit(FantasyStickLifecycleNativeTest.Fixture f, org.bukkit.entity.Entity source,
+                                                   org.bukkit.entity.Entity target, boolean cancelled) {
+        var damage = mock(org.bukkit.damage.DamageSource.class);
+        when(damage.getCausingEntity()).thenReturn(source);
+        when(damage.getDirectEntity()).thenReturn(source);
+        var event = new EntityDamageByEntityEvent(source, target, DamageCause.ENTITY_ATTACK, damage, 4);
+        event.setCancelled(cancelled); f.dispatcher.accept(event); return event;
+    }
+
+    private static void die(FantasyStickLifecycleNativeTest.Fixture f, LivingEntity target) {
+        f.dispatcher.accept(new org.bukkit.event.entity.EntityDeathEvent(target,
+            mock(org.bukkit.damage.DamageSource.class), new ArrayList<>(), 0));
+    }
+
+    private static void settle(FantasyStickLifecycleNativeTest.Fixture f) throws Exception {
+        PartyBookNativeTest.drain(f); PartyBookNativeTest.drain(f);
+    }
+
+    private static games.dmg.fantasystick.persistence.CharacterRecord record(FantasyStickLifecycleNativeTest.Fixture f,
+                                                                              FantasyStickLifecycleNativeTest.Actor actor) throws Exception {
+        var storage = (games.dmg.fantasystick.persistence.CharacterStorage)
+            FantasyStickLifecycleNativeTest.Fixture.field(f.plugin, "characters");
+        return storage.find(actor.core.record.id()).get().orElseThrow();
+    }
+
+    private static LivingEntity mob(EntityType type, Location location) {
+        var entity = mock(LivingEntity.class);
+        when(entity.getUniqueId()).thenReturn(UUID.randomUUID());
+        when(entity.getType()).thenReturn(type);
+        when(entity.getLocation()).thenAnswer(ignored -> location.clone());
+        when(entity.getWorld()).thenReturn(location.getWorld());
+        when(entity.getPersistentDataContainer()).thenReturn(new org.bukkit.craftbukkit.persistence.CraftPersistentDataContainer(
+            new org.bukkit.craftbukkit.persistence.CraftPersistentDataTypeRegistry()));
+        return entity;
+    }
+}

src/nativeTest/java/games/dmg/fantasystick/EquipmentAdminCommandNativeTest.java

@@ -17,6 +17,106 @@ class EquipmentAdminCommandNativeTest {
     @TempDir Path data;
     @BeforeAll static void bootstrap() throws Exception { NativeRuntime.bootstrap(); }
 
+    @Test void registeredGivePersistsOneFreshSheetThenDeliversActivatesAndReloads() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var target = new FantasyStickLifecycleNativeTest.Actor(data); f.players.put(target.core.id, target.player);
+            var before = target.core.snapshot(); var sender = new Sender();
+            assertTrue(f.command.execute(sender.port, "fantasystick", new String[]{"give", "Account"}));
+            assertTrue(sender.messages.isEmpty(), "Queued persistence is not successful delivery");
+            ((games.dmg.fantasystick.persistence.CharacterStorage) FantasyStickLifecycleNativeTest.Fixture.field(f.plugin, "characters"))
+                .find(java.util.UUID.randomUUID()).get(5, java.util.concurrent.TimeUnit.SECONDS);
+            var callback = f.tasks.poll(5, java.util.concurrent.TimeUnit.SECONDS); assertNotNull(callback); callback.run(); callback.run();
+            assertTrue(sender.messages.getLast().contains("Issued one new character sheet"));
+            assertFalse(java.util.Arrays.equals(before, target.core.snapshot()));
+            var sheets = new games.dmg.fantasystick.items.CharacterSheets();
+            var delivered = java.util.stream.IntStream.range(0, 36).mapToObj(target.core.inventory::getItem)
+                .filter(item -> sheets.identify(item).isPresent()).filter(item -> !sheets.identify(item).orElseThrow().equals(target.core.record.id())).toList();
+            assertEquals(1, delivered.size(), "Repeated callback must not duplicate delivery");
+            assertEquals(target.core.record.id(),sheets.identify(target.core.inventory.getItemInOffHand()).orElseThrow());
+            assertTrue(((games.dmg.fantasystick.session.EquipmentSessions) FantasyStickLifecycleNativeTest.Fixture.field(f.plugin,"sessions")).active(target.core.id).isEmpty());
+            var id = sheets.identify(delivered.getFirst()).orElseThrow();
+            var storage = (games.dmg.fantasystick.persistence.CharacterStorage) FantasyStickLifecycleNativeTest.Fixture.field(f.plugin, "characters");
+            var record = storage.find(id).get(5, java.util.concurrent.TimeUnit.SECONDS).orElseThrow();
+            assertEquals(java.math.BigInteger.valueOf(40), record.unspentPoints()); assertEquals(1, record.level());
+            assertEquals(java.math.BigInteger.ZERO, record.experience()); assertFalse(record.dead()); assertTrue(record.learned().isEmpty());
+            assertTrue(record.stats().values().stream().allMatch(java.math.BigInteger.ZERO::equals));assertEquals(new java.math.BigDecimal("10"),record.health());
+            assertEquals(java.util.Collections.nCopies(7,""),record.loadout());assertTrue(record.cooldowns().isEmpty());assertFalse(record.name().isBlank());
+            target.core.inventory.remove(delivered.getFirst()); target.core.inventory.setItemInOffHand(delivered.getFirst());
+            f.activate(target); assertEquals(id, ((games.dmg.fantasystick.session.EquipmentSessions) FantasyStickLifecycleNativeTest.Fixture.field(f.plugin, "sessions")).active(target.core.id).orElseThrow().character());
+            f.plugin.setEnabled(false); f.plugin.setEnabled(true);
+            assertEquals(record, ((games.dmg.fantasystick.persistence.CharacterStorage) FantasyStickLifecycleNativeTest.Fixture.field(f.plugin, "characters")).find(id).get(5, java.util.concurrent.TimeUnit.SECONDS).orElseThrow());
+        }
+    }
+
+    @Test void giveCompletionAndRejectedExecutionArePermissionAwareStrictAndReadOnly() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true); var target = new FantasyStickLifecycleNativeTest.Actor(data); f.players.put(target.core.id,target.player);
+            var sender=new Sender();
+            assertEquals(List.of("config","experience","give","inspect","recover"),f.command.tabComplete(sender.port,"fantasystick",new String[]{""}));
+            assertEquals(List.of("give"),f.command.tabComplete(sender.port,"fantasystick",new String[]{"g"}));
+            assertEquals(List.of("Account"),f.command.tabComplete(sender.port,"fantasystick",new String[]{"give",""}));
+            assertEquals(List.of("Account"),f.command.tabComplete(sender.port,"fantasystick",new String[]{"give","Acc"}));
+            assertTrue(f.command.tabComplete(sender.port,"fantasystick",new String[]{"give","Account",""}).isEmpty());
+            sender.allowed=false;assertTrue(f.command.tabComplete(sender.port,"fantasystick",new String[]{"give",""}).isEmpty());
+            var original=target.core.snapshot();f.command.getExecutor().onCommand(sender.port,f.command,"fantasystick",new String[]{"give","Account"});
+            sender.allowed=true;for(String[] args:List.of(new String[]{"give"},new String[]{"give","Missing"},new String[]{"give","Account","extra"}))f.command.execute(sender.port,"fantasystick",args);
+            assertArrayEquals(original,target.core.snapshot());assertTrue(f.tasks.isEmpty());
+            assertEquals(1,java.nio.file.Files.list(data.resolve("characters")).filter(path->path.toString().endsWith(".yml")).count());
+            for(int slot=0;slot<36;slot++)target.core.inventory.setItem(slot,new org.bukkit.inventory.ItemStack(org.bukkit.Material.STONE));
+            var full=target.core.snapshot();f.command.execute(sender.port,"fantasystick",new String[]{"give","Account"});assertTrue(sender.messages.getLast().contains("no inventory space"));
+            assertArrayEquals(full,target.core.snapshot());assertTrue(f.tasks.isEmpty());assertEquals(1,java.nio.file.Files.list(data.resolve("characters")).filter(path->path.toString().endsWith(".yml")).count());
+        }
+    }
+
+    @Test void giveSaveFailureDisconnectSlotRaceAndLifecycleInterruptionNeverDuplicateOrOverwrite() throws Exception {
+        for(String route:List.of("save","disconnect","slot","close")){var dir=data.resolve(route);java.nio.file.Files.createDirectories(dir);try(var f=new FantasyStickLifecycleNativeTest.Fixture(dir)){
+            f.plugin.setEnabled(true);var target=new FantasyStickLifecycleNativeTest.Actor(dir);f.players.put(target.core.id,target.player);var sender=new Sender();var original=target.core.snapshot();
+            var storage=(games.dmg.fantasystick.persistence.CharacterStorage)FantasyStickLifecycleNativeTest.Fixture.field(f.plugin,"characters");
+            var worker=(java.util.concurrent.ExecutorService)FantasyStickLifecycleNativeTest.Fixture.field(storage,"worker");var entered=new java.util.concurrent.CountDownLatch(1);var release=new java.util.concurrent.CountDownLatch(1);worker.execute(()->{entered.countDown();try{release.await(5,java.util.concurrent.TimeUnit.SECONDS);}catch(InterruptedException e){Thread.currentThread().interrupt();}});assertTrue(entered.await(5,java.util.concurrent.TimeUnit.SECONDS));
+            f.command.execute(sender.port,"fantasystick",new String[]{"give","Account"});
+            if(route.equals("save")){var issuer=FantasyStickLifecycleNativeTest.Fixture.field(f.command.getExecutor(),"characterIssuer");var pending=(java.util.Map<?,?>)FantasyStickLifecycleNativeTest.Fixture.field(issuer,"pending");var attempt=pending.values().iterator().next();var record=(games.dmg.fantasystick.persistence.CharacterRecord)FantasyStickLifecycleNativeTest.Fixture.field(attempt,"record");java.nio.file.Files.createDirectory(dir.resolve("characters").resolve(record.id()+".yml"));}
+            release.countDown();storage.find(java.util.UUID.randomUUID()).get(5,java.util.concurrent.TimeUnit.SECONDS);var callback=f.tasks.poll(5,java.util.concurrent.TimeUnit.SECONDS);assertNotNull(callback);
+            if(route.equals("disconnect"))target.core.online=false;if(route.equals("slot"))target.core.inventory.setItem(1,new org.bukkit.inventory.ItemStack(org.bukkit.Material.DIAMOND));if(route.equals("close"))f.plugin.setEnabled(false);callback.run();
+            if(!route.equals("close"))storage.find(java.util.UUID.randomUUID()).get(5,java.util.concurrent.TimeUnit.SECONDS);
+            assertFalse(sender.messages.stream().anyMatch(message->message.startsWith("Issued one")));assertEquals(route.equals("slot")?org.bukkit.Material.DIAMOND:original[1]==null?null:original[1].getType(),target.core.inventory.getItem(1)==null?null:target.core.inventory.getItem(1).getType());
+            if(!route.equals("save"))assertEquals(1,java.nio.file.Files.list(dir.resolve("characters")).filter(path->path.toString().endsWith(".yml")).count());
+            release.countDown();}}
+    }
+
+    @Test void recoveryCompletionIsPermissionAwarePrefixFilteredUuidOnlyAndReadOnly() throws Exception {
+        try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
+            f.plugin.setEnabled(true);
+            var first = new FantasyStickLifecycleNativeTest.Actor(data);
+            var second = new FantasyStickLifecycleNativeTest.Actor(data);
+            var offline = new FantasyStickLifecycleNativeTest.Actor(data);
+            offline.core.online = false;
+            f.players.put(first.core.id, first.player); f.players.put(second.core.id, second.player); f.players.put(offline.core.id, offline.player);
+            var sender = new Sender();
+            var expected = java.util.stream.Stream.of(first.core.id.toString(), second.core.id.toString()).sorted().toList();
+            assertEquals(List.of("config", "experience", "give", "inspect", "recover"), f.command.tabComplete(sender.port, "fantasystick", new String[]{""}));
+            assertEquals(List.of("inspect"), f.command.tabComplete(sender.port, "fantasystick", new String[]{"in"}));
+            assertEquals(List.of("recover"), f.command.tabComplete(sender.port, "fantasystick", new String[]{"rec"}));
+            assertEquals(expected, f.command.tabComplete(sender.port, "fantasystick", new String[]{"inspect", ""}));
+            String prefix = expected.getFirst().substring(0, 8);
+            assertEquals(expected.stream().filter(id -> id.startsWith(prefix)).toList(),
+                f.command.tabComplete(sender.port, "fantasystick", new String[]{"recover", prefix}));
+            assertFalse(f.command.tabComplete(sender.port, "fantasystick", new String[]{"inspect", ""}).contains("Account"));
+            assertTrue(f.command.tabComplete(sender.port, "fantasystick", new String[]{"inspect", expected.getFirst(), ""}).isEmpty());
+            assertTrue(f.command.tabComplete(sender.port, "fantasystick", new String[]{"unknown", ""}).isEmpty());
+            assertEquals(List.of("adventure-mode"), f.command.tabComplete(sender.port, "fantasystick", new String[]{"config", "adventure-m"}));
+            assertEquals(List.of("false", "true"), f.command.tabComplete(sender.port, "fantasystick", new String[]{"config", "adventure-mode", ""}));
+            assertEquals(List.of("true"), f.command.tabComplete(sender.port, "fantasystick", new String[]{"config", "adventure-mode", "t"}));
+            assertTrue(f.command.tabComplete(sender.port, "fantasystick", new String[]{"config", "adventure-mode", "true", ""}).isEmpty());
+            sender.allowed = false;
+            for (String[] args : List.of(new String[]{""}, new String[]{"inspect", ""}, new String[]{"config", ""},
+                    new String[]{"config", "adventure-mode", ""})) {
+                assertTrue(f.command.tabComplete(sender.port, "fantasystick", args).isEmpty());
+            }
+            assertTrue(f.tasks.isEmpty()); assertFalse(Files.exists(data.resolve("sessions")));
+        }
+    }
+
     @Test void adventureConfigurationCommandReadsValidatesPersistsAndReopensWithoutTouchingPlayers() throws Exception {
         try (var f = new FantasyStickLifecycleNativeTest.Fixture(data)) {
             f.plugin.setEnabled(true);

src/nativeTest/java/games/dmg/fantasystick/EquipmentSessionEventsNativeTest.java

@@ -1285,10 +1285,10 @@ class EquipmentSessionEventsNativeTest {
 
     @Test void selectedAbilityUseReachesItsHandlerWithoutVanillaThrowDrinkEquipBlockOrPlacement() throws Exception {
         try (var f = new Fixture()) {
-            String[] abilities = {"fireball", "purify", "guardian_bond", "shield_bash", "rallying_cry", "war_banner", "revive"};
+            String[] abilities = {"chain_lightning", "purify", "guardian_bond", "shield_bash", "rallying_cry", "frost_nova", "revive"};
             f.loadout(abilities);
             var a = f.actor; f.core.activate(a);
-            var target = port(org.bukkit.entity.Player.class);
+            var target = port(org.bukkit.entity.Player.class); a.targetEntity = target;
             for (int index = 0; index < abilities.length; index++) {
                 int slot = index + 2; a.inventory.getInventory().setSelectedSlot(slot);
                 var item = a.inventory.getItem(slot);