diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index b40db73..3a7cb51 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -35,6 +35,6 @@ jobs:
       - name: Upload development artifact
         uses: actions/upload-artifact@v3
         with:
-          name: spigot-base-${{ github.sha }}
+          name: purpur-base-${{ github.sha }}
           path: build/libs/*.jar
           if-no-files-found: error
diff --git a/.gitea/workflows/release.yml b/.gitea/workflows/release.yml
index 5620f56..48763f9 100644
--- a/.gitea/workflows/release.yml
+++ b/.gitea/workflows/release.yml
@@ -86,8 +86,8 @@ jobs:
         if: steps.release.outputs.created == 'true'
         uses: actions/upload-artifact@v3
         with:
-          name: spigot-base-${{ steps.release.outputs.version }}
-          path: build/libs/spigot-base-${{ steps.release.outputs.version }}.jar
+          name: purpur-base-${{ steps.release.outputs.version }}
+          path: build/libs/purpur-base-${{ steps.release.outputs.version }}.jar
           if-no-files-found: error
 
       - name: Create Gitea release and upload plugin
@@ -101,7 +101,7 @@ jobs:
           PREVIOUS_TAG: ${{ steps.previous_tag.outputs.value }}
         run: |
           api_url="${GITEA_SERVER_URL}/api/v1"
-          jar="build/libs/spigot-base-${VERSION}.jar"
+          jar="build/libs/purpur-base-${VERSION}.jar"
           export RELEASE_BODY
           if [ -n "$PREVIOUS_TAG" ]; then
             RELEASE_BODY=$(git log --pretty='format:- %s (%h)' "${PREVIOUS_TAG}..HEAD")
@@ -138,4 +138,4 @@ jobs:
             -H "Authorization: token ${GITEA_TOKEN}" \
             -H "Content-Type: application/octet-stream" \
             --data-binary "@${jar}" \
-            "${api_url}/repos/${REPOSITORY}/releases/${release_id}/assets?name=spigot-base-${VERSION}.jar"
+            "${api_url}/repos/${REPOSITORY}/releases/${release_id}/assets?name=purpur-base-${VERSION}.jar"
diff --git a/AGENTS.md b/AGENTS.md
index 5591000..b1b93ba 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -1,9 +1,9 @@
-# spigot-base agent entrypoint
+# purpur-base agent entrypoint
 
 The canonical stories, engineering guidance, and **all process documents** are in the private [SoMC OKF wiki](https://git.garvis.dev/dmg/somc-okf/src/branch/main/index.md).
 
-Before work, read the sibling `../somc-okf/index.md`, `../somc-okf/processes/index.md`, `../somc-okf/projects/spigot-base/index.md`, `engineering.md` in that project section, and relevant `../somc-okf/user-stories/spigot-base/` stories. Also follow the parent workspace `AGENTS.md` when present.
+Before work, read the sibling `../somc-okf/index.md`, `../somc-okf/processes/index.md`, `../somc-okf/projects/purpur-base/index.md`, `engineering.md` in that project section, and relevant `../somc-okf/user-stories/purpur-base/` stories. Also follow the parent workspace `AGENTS.md` when present.
 
-For standalone checkouts, start at the [project page](https://git.garvis.dev/dmg/somc-okf/src/branch/main/projects/spigot-base/index.md) and [shared process](https://git.garvis.dev/dmg/somc-okf/src/branch/main/processes/development.md). Obtain wiki access before feature work; do not recreate a local knowledge bundle. Source builds do not require private wiki access.
+For standalone checkouts, start at the [project page](https://git.garvis.dev/dmg/somc-okf/src/branch/main/projects/purpur-base/index.md) and [shared process](https://git.garvis.dev/dmg/somc-okf/src/branch/main/processes/development.md). Obtain wiki access before feature work; do not recreate a local knowledge bundle. Source builds do not require private wiki access.
 
 Development follows [Development cycle](https://git.garvis.dev/dmg/somc-okf/src/branch/main/runbooks/development-cycle.md): approved stories, failing tests, passing implementation, verification, then source/wiki commit and push. GitOps updates are committed locally **without pushing**; only [Do release](https://git.garvis.dev/dmg/somc-okf/src/branch/main/runbooks/do-release.md) authorizes a reviewed GitOps push.
diff --git a/README.md b/README.md
index 9b9a66a..41e95f8 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,12 @@
-# Spigot Base
+# Purpur Base
 
 A Purpur 26.2 plugin providing progression-gated player bases and quality-of-life unlocks.
 
 Players begin by breaking Survival-mode grass blocks or dirt. The progression paths provide a persistent base, navigation particles, expanding base bounds, controlled flight, personal teleportation, and visitor teleportation.
 
-The approved behavior is specified in the [SoMC OKF wiki](https://git.garvis.dev/dmg/somc-okf/src/branch/main/projects/spigot-base/index.md).
+The approved behavior is specified in the [SoMC OKF wiki](https://git.garvis.dev/dmg/somc-okf/src/branch/main/projects/purpur-base/index.md).
+
+The repository and new artifacts are named `purpur-base`. Runtime identity remains `SpigotBase`: existing `plugins/SpigotBase/` data, commands, `spigotbase.*` permissions, item keys and Java entrypoints remain compatible. Replace the old JAR when installing a new release; never load both distributions together. Historical `spigot-base-*` release assets are retained.
 
 ## Requirements
 
diff --git a/build.gradle.kts b/build.gradle.kts
index fe9f779..082c73a 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -38,6 +38,9 @@ dependencies {
 
 tasks.test {
     useJUnitPlatform()
+    dependsOn(tasks.jar)
+    systemProperty("distribution.jar", tasks.jar.get().archiveFile.get().asFile.absolutePath)
+    systemProperty("distribution.version", project.version.toString())
 }
 
 // Verify client-only label packets against the declared runtime, without starting a server.
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 2ed15d9..f5d282f 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -2,4 +2,4 @@ plugins {
     id("org.gradle.toolchains.foojay-resolver-convention") version "1.0.0"
 }
 
-rootProject.name = "spigot-base"
+rootProject.name = "purpur-base"
diff --git a/src/test/java/games/dmg/spigotbase/PurpurDistributionTest.java b/src/test/java/games/dmg/spigotbase/PurpurDistributionTest.java
new file mode 100644
index 0000000..26ec3b7
--- /dev/null
+++ b/src/test/java/games/dmg/spigotbase/PurpurDistributionTest.java
@@ -0,0 +1,49 @@
+package games.dmg.spigotbase;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import java.io.DataInputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Map;
+import java.util.jar.JarFile;
+import org.junit.jupiter.api.Test;
+import org.yaml.snakeyaml.Yaml;
+
+/** Distribution branding is deliberately independent of persistent/runtime plugin identity. */
+class PurpurDistributionTest {
+    @Test
+    void packagesJava25UnderNewNameWithoutChangingRuntimeIdentityOrBundlingTheApi() throws Exception {
+        Path artifact = Path.of(System.getProperty("distribution.jar"));
+        String version = System.getProperty("distribution.version");
+        assertEquals("purpur-base-" + version + ".jar", artifact.getFileName().toString());
+        try (var jar = new JarFile(artifact.toFile())) {
+            Map<?, ?> metadata = new Yaml().load(jar.getInputStream(jar.getJarEntry("plugin.yml")));
+            assertEquals(version, metadata.get("version"));
+            assertEquals("SpigotBase", metadata.get("name"), "Do not orphan the existing plugin data folder or default namespace");
+            assertEquals("games.dmg.spigotbase.SpigotBasePlugin", metadata.get("main"));
+            assertTrue(((Map<?, ?>) metadata.get("permissions")).containsKey("spigotbase.admin"));
+            try (var bytecode = new DataInputStream(jar.getInputStream(
+                jar.getJarEntry("games/dmg/spigotbase/SpigotBasePlugin.class")))) {
+                assertEquals(0xCAFEBABE, bytecode.readInt());
+                bytecode.readUnsignedShort();
+                assertEquals(69, bytecode.readUnsignedShort(), "Plugin bytecode must target Java 25");
+            }
+            assertFalse(jar.stream().anyMatch(entry -> entry.getName().startsWith("org/bukkit/")
+                || entry.getName().startsWith("org/purpurmc/") || entry.getName().endsWith("Test.class")));
+        }
+    }
+
+    @Test
+    void releaseAndCiAgreeWithThePurpurDistributionNameAndToolchain() throws Exception {
+        String build = Files.readString(Path.of("build.gradle.kts"));
+        assertTrue(build.contains("purpur-api:26.2.build.2618-stable"));
+        assertFalse(build.contains("org.spigotmc:spigot-api"));
+        for (String workflow : new String[] {"ci.yml", "release.yml"}) {
+            String content = Files.readString(Path.of(".gitea/workflows", workflow));
+            assertTrue(content.contains("java-version: 25"));
+            assertTrue(content.contains("purpur-base-"), workflow + " must publish the renamed distribution");
+            assertFalse(content.contains("spigot-base-"), workflow + " must not look for the old JAR filename");
+        }
+    }
+}