feat(admission): add scheduled group access

apps/web/src/app/admin/(console)/groups/[groupId]/page.tsx

@@ -1,4 +1,4 @@
-import { groups, minecraftAccounts, userGroupMemberships, users } from "@minecraft-account-manager/database";
+import { groupAccessWindows, groups, minecraftAccounts, userGroupMemberships, users } from "@minecraft-account-manager/database";
 import { and, asc, desc, eq, isNull, sql } from "drizzle-orm";
 import type { ReactNode } from "react";
 import Link from "next/link";
@@ -6,16 +6,18 @@ import { notFound } from "next/navigation";
 import { AdminModalForm } from "@/components/admin-modal-form";
 import { AdminUserTable } from "@/components/admin-user-table";
 import { GroupPolicyControl } from "@/components/group-policy-control";
+import { GroupScheduleEditor, GroupScheduleSummary } from "@/components/group-schedule-editor";
 import { db } from "@/lib/database";
 import { isEffectiveGroupMember } from "@/lib/group-management";
 import { assignUserGroupFromRegistry } from "../../users/actions";
-import { deleteGroup, setGroupAccess, setGroupAnonymizedNetworkAccess, updateGroupDetails } from "../actions";
+import { deleteGroup, replaceGroupSchedule, setGroupAccess, setGroupAnonymizedNetworkAccess, updateGroupDetails } from "../actions";
 
 const savedMessages: Record<string, string> = {
   created: "Group created.",
   details: "Group details updated.",
   access: "Minecraft access policy updated.",
   "network-access": "VPN, proxy, and Tor policy updated.",
+  schedule: "Weekly access schedule updated.",
   group: "Member group updated.",
 };
 
@@ -23,6 +25,7 @@ const errorMessages: Record<string, string> = {
   "invalid-group": "Enter a valid name and a description of no more than 500 characters.",
   "duplicate-group": "A group with that name already exists.",
   "invalid-group-assignment": "The user or destination group no longer exists. No membership change was applied.",
+  "invalid-schedule": "Use valid, non-overlapping weekly access windows. Start and end cannot be identical.",
 };
 
 export const dynamic = "force-dynamic";
@@ -39,7 +42,7 @@ export default async function GroupPage({
   const [group] = await db.select().from(groups).where(eq(groups.id, groupId)).limit(1);
   if (!group) notFound();
 
-  const [allUsers, allGroups, memberships] = await Promise.all([
+  const [allUsers, allGroups, memberships, accessWindows] = await Promise.all([
     db.select({
       id: users.id,
       firstName: users.firstName,
@@ -65,6 +68,11 @@ export default async function GroupPage({
       .from(groups).orderBy(desc(groups.isDefault), asc(groups.name)),
     db.select({ userId: userGroupMemberships.userId, groupId: userGroupMemberships.groupId })
       .from(userGroupMemberships),
+    db.select({
+      startMinuteOfWeek: groupAccessWindows.startMinuteOfWeek,
+      endMinuteOfWeek: groupAccessWindows.endMinuteOfWeek,
+    }).from(groupAccessWindows).where(eq(groupAccessWindows.groupId, group.id))
+      .orderBy(groupAccessWindows.startMinuteOfWeek),
   ]);
   const assignmentByUser = Object.fromEntries(memberships.map((membership) => [membership.userId, membership.groupId]));
   const memberUsers = allUsers.filter((user) => isEffectiveGroupMember(user.id, assignmentByUser, group));
@@ -101,8 +109,17 @@ export default async function GroupPage({
       <section aria-labelledby="group-policy-heading" className="mt-10 border border-line bg-panel p-6 shadow-[6px_6px_0_var(--color-shadow)]">
         <div className="border-b border-line pb-4"><p className="font-mono text-[9px] font-bold uppercase tracking-widest text-muted">Admission controls</p><h2 className="mt-2 font-display text-3xl font-black uppercase" id="group-policy-heading">Group policies</h2></div>
         <div className="mt-6 grid gap-6 sm:grid-cols-2">
-          <PolicyDetail description="Controls whether members can connect to Minecraft." label="Minecraft access"><GroupPolicyControl action={setGroupAccess} enabled={group.accessEnabled} groupId={group.id} groupName={group.name} memberCount={memberUsers.length} policy="Minecraft access" returnLocation="detail" /></PolicyDetail>
-          <PolicyDetail description="Allows confirmed VPN, proxy, and Tor connections." label="VPN / proxy / Tor"><GroupPolicyControl action={setGroupAnonymizedNetworkAccess} enabled={group.anonymizedNetworksAllowed} groupId={group.id} groupName={group.name} memberCount={memberUsers.length} policy="VPN / proxy / Tor" returnLocation="detail" /></PolicyDetail>
+          <PolicyDetail description="Controls whether members can connect to Minecraft. Disabled access always overrides the schedule." label="Minecraft access"><GroupPolicyControl action={setGroupAccess} enabled={group.accessEnabled} groupId={group.id} groupName={group.name} memberCount={memberUsers.length} policy="Minecraft access" returnLocation="detail" /></PolicyDetail>
+          <PolicyDetail description="Allows confirmed VPN, proxy, and Tor connections after access and schedule checks pass." label="VPN / proxy / Tor"><GroupPolicyControl action={setGroupAnonymizedNetworkAccess} enabled={group.anonymizedNetworksAllowed} groupId={group.id} groupName={group.name} memberCount={memberUsers.length} policy="VPN / proxy / Tor" returnLocation="detail" /></PolicyDetail>
+        </div>
+        <div className="mt-7 border-t border-line pt-6">
+          <div className="flex flex-col gap-5 sm:flex-row sm:items-start sm:justify-between">
+            <div className="max-w-2xl"><h3 className="font-mono text-xs font-bold uppercase">Weekly access schedule</h3><p className="mt-2 text-xs leading-5 text-muted">When Minecraft access is enabled, members may log in only during these recurring UTC windows. Existing sessions are not disconnected when a window ends.</p><div className="mt-4"><GroupScheduleSummary windows={accessWindows} /></div></div>
+            <AdminModalForm action={replaceGroupSchedule} description={`Replace the complete weekly access schedule for ${group.name}. Minecraft access must still be enabled.`} submitLabel="Save schedule" title={`Schedule ${group.name}`} triggerClassName="shrink-0 border border-ink px-4 py-3 font-mono text-[10px] font-bold uppercase tracking-wider" triggerLabel="Edit schedule">
+              <input name="groupId" type="hidden" value={group.id} />
+              <GroupScheduleEditor windows={accessWindows} />
+            </AdminModalForm>
+          </div>
         </div>
       </section>
 

apps/web/src/app/admin/(console)/groups/actions.schedule.test.ts

@@ -0,0 +1,98 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+const actionState = vi.hoisted(() => ({
+  selected: [] as unknown[][],
+  inserted: [] as unknown[],
+  deleted: 0,
+  authorized: 0,
+  failAudit: false,
+}));
+
+vi.mock("@/lib/auth/require-admin", () => ({
+  requireAdminSession: async () => {
+    actionState.authorized += 1;
+    return { email: "admin@example.test", name: "Admin" };
+  },
+}));
+
+vi.mock("next/headers", () => ({ headers: async () => new Headers() }));
+vi.mock("next/navigation", () => ({
+  redirect: (path: string) => {
+    throw new Error(`REDIRECT:${path}`);
+  },
+}));
+
+vi.mock("@/lib/database", () => {
+  function selection(response: unknown[]) {
+    const chain: Record<string, unknown> = {};
+    for (const method of ["from", "where", "orderBy"]) chain[method] = () => chain;
+    chain.limit = () => Promise.resolve(response);
+    chain.then = (resolve: (value: unknown[]) => unknown, reject: (reason: unknown) => unknown) =>
+      Promise.resolve(response).then(resolve, reject);
+    return chain;
+  }
+  const tx = {
+    execute: async () => undefined,
+    select: () => selection(actionState.selected.shift() ?? []),
+    delete: () => ({ where: async () => { actionState.deleted += 1; } }),
+    insert: () => ({
+      values: async (value: unknown) => {
+        if (actionState.failAudit && !Array.isArray(value)) throw new Error("audit unavailable");
+        actionState.inserted.push(value);
+      },
+    }),
+  };
+  return { db: { transaction: async (callback: (transaction: typeof tx) => Promise<unknown>) => callback(tx) } };
+});
+
+import { replaceGroupSchedule } from "./actions";
+
+function scheduleForm() {
+  const formData = new FormData();
+  formData.set("groupId", "11111111-1111-4111-8111-111111111111");
+  formData.append("startMinuteOfWeek", "6960");
+  formData.append("endMinuteOfWeek", "7200");
+  return formData;
+}
+
+describe("replaceGroupSchedule", () => {
+  beforeEach(() => {
+    actionState.selected = [
+      [{ id: "11111111-1111-4111-8111-111111111111", name: "Friday friends" }],
+      [{ startMinuteOfWeek: 480, endMinuteOfWeek: 540 }],
+    ];
+    actionState.inserted = [];
+    actionState.deleted = 0;
+    actionState.authorized = 0;
+    actionState.failAudit = false;
+  });
+
+  it("reauthorizes and replaces all windows with an audit in one transaction", async () => {
+    await expect(replaceGroupSchedule(scheduleForm())).rejects.toThrow("REDIRECT:/admin/groups/11111111-1111-4111-8111-111111111111?saved=schedule");
+    expect(actionState.authorized).toBe(1);
+    expect(actionState.deleted).toBe(1);
+    expect(actionState.inserted[0]).toEqual([{
+      groupId: "11111111-1111-4111-8111-111111111111",
+      startMinuteOfWeek: 6960,
+      endMinuteOfWeek: 7200,
+    }]);
+    expect(actionState.inserted[1]).toEqual(expect.objectContaining({
+      type: "games.minecraft.account-manager.group.schedule-updated",
+      data: expect.objectContaining({
+        previousWindows: [{ startMinuteOfWeek: 480, endMinuteOfWeek: 540 }],
+        windows: [{ startMinuteOfWeek: 6960, endMinuteOfWeek: 7200 }],
+        adminEmail: "admin@example.test",
+      }),
+    }));
+  });
+
+  it("does not report success when the atomic audit write fails", async () => {
+    actionState.failAudit = true;
+    await expect(replaceGroupSchedule(scheduleForm())).rejects.toThrow("audit unavailable");
+    expect(actionState.inserted).toEqual([[{
+      groupId: "11111111-1111-4111-8111-111111111111",
+      startMinuteOfWeek: 6960,
+      endMinuteOfWeek: 7200,
+    }]]);
+  });
+});

apps/web/src/app/admin/(console)/groups/actions.ts

@@ -1,7 +1,7 @@
 "use server";
 
 import { randomUUID } from "node:crypto";
-import { events, groups, userGroupMemberships } from "@minecraft-account-manager/database";
+import { events, groupAccessWindows, groups, userGroupMemberships } from "@minecraft-account-manager/database";
 import { getClientIp } from "@minecraft-account-manager/network";
 import { and, eq, ne, sql } from "drizzle-orm";
 import { headers } from "next/headers";
@@ -9,6 +9,7 @@ import { redirect } from "next/navigation";
 import { requireAdminSession } from "@/lib/auth/require-admin";
 import { db } from "@/lib/database";
 import { editableGroupName, groupSlug, validateGroupDetails } from "@/lib/group-management";
+import { parseScheduleWindows } from "@/lib/group-schedule";
 
 const UUID_PATTERN = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
 
@@ -175,6 +176,41 @@ export async function setGroupAnonymizedNetworkAccess(formData: FormData) {
   return updateGroupPolicy(formData, "anonymized-networks");
 }
 
+export async function replaceGroupSchedule(formData: FormData) {
+  const admin = await requireAdminSession();
+  const groupId = String(formData.get("groupId") ?? "");
+  const windows = parseScheduleWindows(formData);
+  if (!UUID_PATTERN.test(groupId) || !windows) redirect(groupPath(groupId, "error=invalid-schedule"));
+  const ipAddress = await auditContext();
+
+  const updated = await db.transaction(async (tx) => {
+    await tx.execute(sql`select ${groups.id} from ${groups} where ${groups.id} = ${groupId} for update`);
+    const [group] = await tx.select({ id: groups.id, name: groups.name }).from(groups)
+      .where(eq(groups.id, groupId)).limit(1);
+    if (!group) return null;
+    const previous = await tx.select({
+      startMinuteOfWeek: groupAccessWindows.startMinuteOfWeek,
+      endMinuteOfWeek: groupAccessWindows.endMinuteOfWeek,
+    }).from(groupAccessWindows).where(eq(groupAccessWindows.groupId, group.id));
+    await tx.delete(groupAccessWindows).where(eq(groupAccessWindows.groupId, group.id));
+    if (windows.length) {
+      await tx.insert(groupAccessWindows).values(windows.map((window) => ({ ...window, groupId: group.id })));
+    }
+    await tx.insert(events).values({
+      id: randomUUID(),
+      source: "/web/admin",
+      type: "games.minecraft.account-manager.group.schedule-updated",
+      subject: `group/${group.id}`,
+      time: new Date(),
+      data: auditData(admin, { name: group.name, previousWindows: previous, windows }),
+      ipAddress: ipAddress ?? null,
+    });
+    return group;
+  });
+  if (!updated) redirect("/admin/groups?error=unknown-group");
+  redirect(groupPath(updated.id, "saved=schedule"));
+}
+
 export async function deleteGroup(formData: FormData) {
   const admin = await requireAdminSession();
   const groupId = String(formData.get("groupId") ?? "");

apps/web/src/app/admin/(console)/settings/page.tsx

@@ -17,6 +17,7 @@ export default async function SettingsPage({
     registrationMessage: settings?.registrationMessage ?? DEFAULT_ADMISSION_MESSAGES.registrationMessage,
     groupAccessDeniedMessage: settings?.groupAccessDeniedMessage ?? DEFAULT_ADMISSION_MESSAGES.groupAccessDeniedMessage,
     vpnDeniedMessage: settings?.vpnDeniedMessage ?? DEFAULT_ADMISSION_MESSAGES.vpnDeniedMessage,
+    scheduledAccessDeniedMessage: settings?.scheduledAccessDeniedMessage ?? DEFAULT_ADMISSION_MESSAGES.scheduledAccessDeniedMessage,
   };
   const guildId = process.env.DISCORD_GUILD_ID?.trim();
   const inviteUrl = process.env.DISCORD_INVITE_URL?.trim();
@@ -40,9 +41,10 @@ export default async function SettingsPage({
 
           <fieldset className="space-y-7">
             <legend className="font-display text-2xl font-black uppercase">Minecraft denial messages</legend>
-            <p className="text-sm leading-6 text-muted">Each plain-text message is returned for one admission outcome. Messages must be between 10 and 500 characters.</p>
-            <AdmissionMessageField description="Shown when the Minecraft identity is not registered." label="Registration required" name="registrationMessage" value={messages.registrationMessage} />
+            <p className="text-sm leading-6 text-muted">Each plain-text template is returned for one admission outcome. Messages must be between 10 and 500 characters. Registration, group, and network templates support <code>{"{player}"}</code> and <code>{"{group}"}</code>.</p>
+            <AdmissionMessageField description="Shown when the Minecraft identity is not registered. The unresolved group is everyone." label="Registration required" name="registrationMessage" value={messages.registrationMessage} />
             <AdmissionMessageField description="Shown when the effective group has Minecraft access disabled." label="Group access disabled" name="groupAccessDeniedMessage" value={messages.groupAccessDeniedMessage} />
+            <AdmissionMessageField description="Shown outside a scheduled access window. Also supports {next_start} and {next_end}; generated times explicitly use UTC." label="Scheduled access denied" name="scheduledAccessDeniedMessage" value={messages.scheduledAccessDeniedMessage} />
             <AdmissionMessageField description="Shown for VPN, proxy, or Tor connections when the effective group has no exception." label="VPN, proxy, or Tor denied" name="vpnDeniedMessage" value={messages.vpnDeniedMessage} />
           </fieldset>
           <button className="mt-8 border border-ink bg-ink px-6 py-3 font-mono text-xs font-bold uppercase tracking-[0.16em] text-canvas hover:bg-accent" type="submit">Save configuration</button>
@@ -60,7 +62,7 @@ function AdmissionMessageField({
 }: {
   description: string;
   label: string;
-  name: "registrationMessage" | "groupAccessDeniedMessage" | "vpnDeniedMessage";
+  name: "registrationMessage" | "groupAccessDeniedMessage" | "scheduledAccessDeniedMessage" | "vpnDeniedMessage";
   value: string;
 }) {
   const descriptionId = `${name}-description`;

apps/web/src/app/api/velocity/access/route.schedule.test.ts

@@ -0,0 +1,136 @@
+import { hashToken } from "@minecraft-account-manager/auth";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+const databaseState = vi.hoisted(() => ({
+  responses: [] as unknown[][],
+  inserted: [] as Array<Record<string, unknown>>,
+  isolationLevel: "",
+}));
+
+vi.mock("@/lib/database", () => {
+  function selection(response: unknown[]) {
+    const chain: Record<string, unknown> = {};
+    for (const method of ["from", "where", "innerJoin", "leftJoin", "orderBy"]) {
+      chain[method] = () => chain;
+    }
+    chain.limit = () => Promise.resolve(response);
+    chain.then = (resolve: (value: unknown[]) => unknown, reject: (reason: unknown) => unknown) =>
+      Promise.resolve(response).then(resolve, reject);
+    return chain;
+  }
+  const tx = {
+    select: () => selection(databaseState.responses.shift() ?? []),
+    insert: () => ({
+      values: (value: Record<string, unknown>) => {
+        databaseState.inserted.push(value);
+        return Promise.resolve();
+      },
+    }),
+    delete: () => ({ where: () => Promise.resolve() }),
+    update: () => ({ set: () => ({ where: () => Promise.resolve() }) }),
+  };
+  return {
+    db: {
+      select: () => selection(databaseState.responses.shift() ?? []),
+      transaction: async (callback: (transaction: typeof tx) => Promise<unknown>, options: { isolationLevel?: string }) => {
+        databaseState.isolationLevel = options?.isolationLevel ?? "";
+        return callback(tx);
+      },
+    },
+  };
+});
+
+vi.mock("@/lib/ip-intelligence", () => ({
+  getIpIntelligence: async () => ({ classification: "clear" }),
+  toAuditIpData: () => ({ classification: "clear" }),
+}));
+
+vi.mock("@/lib/logger", () => ({ logger: { error: vi.fn() } }));
+
+import { POST } from "./route";
+
+const messages = {
+  registrationMessage: "Register {player} in {group}.",
+  groupAccessDeniedMessage: "Disabled {player} in {group}.",
+  vpnDeniedMessage: "Network denied for {player} in {group}.",
+  scheduledAccessDeniedMessage: "Scheduled {player} in {group}: {next_start} / {next_end}.",
+};
+
+function utcMinuteOfWeek(value: Date) {
+  return ((value.getUTCDay() + 6) % 7) * 1440 + value.getUTCHours() * 60 + value.getUTCMinutes();
+}
+
+function normalized(value: number) {
+  return (value + 10080) % 10080;
+}
+
+function request() {
+  return new Request("http://localhost/api/velocity/access", {
+    method: "POST",
+    headers: { authorization: "Bearer route-secret", "content-type": "application/json" },
+    body: JSON.stringify({
+      requestId: "11111111-1111-4111-8111-111111111111",
+      serverId: "velocity-main",
+      minecraftUuid: "0123456789abcdef0123456789abcdef",
+      username: "AlexMC",
+      ipAddress: "203.0.113.10",
+      occurredAt: new Date().toISOString(),
+    }),
+  });
+}
+
+function arrange(group: { accessEnabled: boolean; anonymizedNetworksAllowed: boolean }, windows: Array<{ startMinuteOfWeek: number; endMinuteOfWeek: number }>) {
+  databaseState.responses = [
+    [{ secretHash: hashToken("route-secret") }],
+    [messages],
+    [{ id: "account-id", userId: "user-id", minecraftUuid: "0123456789abcdef0123456789abcdef", username: "AlexMC" }],
+    [{ id: "group-id", name: "Friday friends", ...group }],
+    [{ id: "everyone-id", name: "everyone", accessEnabled: false, anonymizedNetworksAllowed: false }],
+    windows,
+  ];
+}
+
+describe("Velocity scheduled admission integration", () => {
+  beforeEach(() => {
+    databaseState.responses = [];
+    databaseState.inserted = [];
+    databaseState.isolationLevel = "";
+  });
+
+  it("loads effective-group windows and returns a rendered schedule denial", async () => {
+    const minute = utcMinuteOfWeek(new Date());
+    arrange(
+      { accessEnabled: true, anonymizedNetworksAllowed: false },
+      [{ startMinuteOfWeek: normalized(minute + 60), endMinuteOfWeek: normalized(minute + 120) }],
+    );
+
+    const response = await POST(request());
+    const body = await response.json();
+    expect(body.allowed).toBe(false);
+    expect(body.message).toMatch(/^Scheduled AlexMC in Friday friends: .* UTC \/ .* UTC\.$/);
+    expect(databaseState.isolationLevel).toBe("repeatable read");
+    expect(databaseState.inserted).toContainEqual(expect.objectContaining({
+      type: "games.minecraft.account-manager.game.login.denied",
+      data: expect.objectContaining({ reason: "schedule_disallowed", accessGroup: "Friday friends" }),
+    }));
+  });
+
+  it("fails closed for malformed persisted windows while disabled access retains precedence", async () => {
+    const malformed = [
+      { startMinuteOfWeek: 100, endMinuteOfWeek: 200 },
+      { startMinuteOfWeek: 150, endMinuteOfWeek: 250 },
+    ];
+    arrange({ accessEnabled: true, anonymizedNetworksAllowed: true }, malformed);
+    expect(await (await POST(request())).json()).toMatchObject({ allowed: false, message: expect.stringContaining("unavailable") });
+    expect(databaseState.inserted).toContainEqual(expect.objectContaining({
+      data: expect.objectContaining({ reason: "schedule_disallowed" }),
+    }));
+
+    databaseState.inserted = [];
+    arrange({ accessEnabled: false, anonymizedNetworksAllowed: true }, malformed);
+    expect(await (await POST(request())).json()).toEqual({ allowed: false, message: "Disabled AlexMC in Friday friends." });
+    expect(databaseState.inserted).toContainEqual(expect.objectContaining({
+      data: expect.objectContaining({ reason: "group_access_disabled" }),
+    }));
+  });
+});

apps/web/src/app/api/velocity/access/route.ts

@@ -1,9 +1,10 @@
 import { randomUUID } from "node:crypto";
-import { gameAdmissionDenialReason, isRequestTimestampFresh, resolveEffectiveGroup, verifyHashedToken } from "@minecraft-account-manager/auth";
+import { isRequestTimestampFresh, resolveEffectiveGroup, verifyHashedToken } from "@minecraft-account-manager/auth";
 import { problemDetails, velocityAccessRequestSchema } from "@minecraft-account-manager/contracts";
 import {
   appSettings,
   events,
+  groupAccessWindows,
   groups,
   ipObservations,
   minecraftAccounts,
@@ -13,9 +14,10 @@ import {
 } from "@minecraft-account-manager/database";
 import { and, eq, isNull, lt, sql } from "drizzle-orm";
 import { NextResponse } from "next/server";
-import { admissionDenialMessage, DEFAULT_ADMISSION_MESSAGES } from "@/lib/admission-settings";
+import { admissionDenialMessage, DEFAULT_ADMISSION_MESSAGES, renderAdmissionMessage } from "@/lib/admission-settings";
 import { db } from "@/lib/database";
 import { isUniqueConstraintViolation } from "@/lib/database-errors";
+import { evaluateRegisteredPlayerAdmission } from "@/lib/game-admission-policy";
 import { getIpIntelligence, toAuditIpData } from "@/lib/ip-intelligence";
 import { logger } from "@/lib/logger";
 import { problemInstance, problemResponse } from "@/lib/problem-response";
@@ -115,10 +117,12 @@ async function handleVelocityAccess(request: Request) {
     registrationMessage: settings?.registrationMessage ?? DEFAULT_ADMISSION_MESSAGES.registrationMessage,
     groupAccessDeniedMessage: settings?.groupAccessDeniedMessage ?? DEFAULT_ADMISSION_MESSAGES.groupAccessDeniedMessage,
     vpnDeniedMessage: settings?.vpnDeniedMessage ?? DEFAULT_ADMISSION_MESSAGES.vpnDeniedMessage,
+    scheduledAccessDeniedMessage: settings?.scheduledAccessDeniedMessage ?? DEFAULT_ADMISSION_MESSAGES.scheduledAccessDeniedMessage,
   };
 
   const intelligence = await getIpIntelligence(input.ipAddress);
   const auditIpData = toAuditIpData(intelligence);
+  const decisionAt = new Date();
 
   const decision = await db.transaction(async (tx) => {
       await tx.delete(pluginRequests).where(lt(pluginRequests.expiresAt, new Date()));
@@ -187,7 +191,13 @@ async function handleVelocityAccess(request: Request) {
           classification: intelligence.classification,
           observedAt: occurredAt,
         });
-        return { allowed: false as const, message: admissionDenialMessage("not_registered", admissionMessages) };
+        return {
+          allowed: false as const,
+          message: renderAdmissionMessage(admissionDenialMessage("not_registered", admissionMessages), {
+            player: input.username,
+            group: "everyone",
+          }),
+        };
       }
 
       const [explicitGroup] = await tx
@@ -202,9 +212,22 @@ async function handleVelocityAccess(request: Request) {
         .where(eq(groups.isDefault, true))
         .limit(1);
       const effectiveGroup = resolveEffectiveGroup(explicitGroup ?? null, defaultGroup ?? null);
-
-      const denialReason = gameAdmissionDenialReason(effectiveGroup ?? null, intelligence.classification);
-      if (denialReason) {
+      const accessWindows = effectiveGroup
+        ? await tx.select({
+            startMinuteOfWeek: groupAccessWindows.startMinuteOfWeek,
+            endMinuteOfWeek: groupAccessWindows.endMinuteOfWeek,
+          }).from(groupAccessWindows).where(eq(groupAccessWindows.groupId, effectiveGroup.id))
+        : [];
+      const policyDecision = evaluateRegisteredPlayerAdmission({
+        group: effectiveGroup ?? null,
+        windows: accessWindows,
+        classification: intelligence.classification,
+        now: decisionAt,
+        player: input.username,
+        messages: admissionMessages,
+      });
+      if (!policyDecision.allowed) {
+        const denialReason = policyDecision.reason;
         await tx.insert(events).values({
           id: randomUUID(),
           source: `/velocity/${input.serverId}`,
@@ -217,6 +240,10 @@ async function handleVelocityAccess(request: Request) {
             reason: denialReason,
             accessGroup: effectiveGroup?.name ?? null,
             accessGroupId: effectiveGroup?.id ?? null,
+            nextScheduleWindow: policyDecision.nextWindow ? {
+              start: policyDecision.nextWindow.start.toISOString(),
+              end: policyDecision.nextWindow.end.toISOString(),
+            } : null,
             ipIntelligence: auditIpData,
           },
           ipAddress: input.ipAddress,
@@ -234,7 +261,7 @@ async function handleVelocityAccess(request: Request) {
         });
         return {
           allowed: false as const,
-          message: admissionDenialMessage(denialReason, admissionMessages),
+          message: policyDecision.message,
         };
       }
 
@@ -297,7 +324,7 @@ async function handleVelocityAccess(request: Request) {
       });
 
       return { allowed: true as const, message: "Account approved." };
-    });
+    }, { isolationLevel: "repeatable read" });
 
   return NextResponse.json(decision);
 }