diff --git a/docs/restore-rehearsal.md b/docs/restore-rehearsal.md
index 86a304d..bb14d62 100644
--- a/docs/restore-rehearsal.md
+++ b/docs/restore-rehearsal.md
@@ -136,7 +136,12 @@ allocated loopback ports. Do not use a production callback or provider key.
    `SMOKE_ALLOW_WRITE=1`, and record its output without recording secrets. It
    exercises login/session, staged publication, failed publication preserving
    the previous generation, tenant isolation, JWT audience checks, and local
-   revocation.
+   revocation:
+
+   ```sh
+   SMOKE_ALLOW_WRITE=1 CONVEX_SELF_HOSTED_URL="http://127.0.0.1:$CONVEX_PORT" \
+     bun "$repo/scripts/smoke-convex.ts" | tee "$work/convex-smoke.log"
+   ```
 
    Then write a deterministic marker that can be looked up after restore. Use
    a fresh marker and synthetic character ID for every rehearsal; do not use a
@@ -144,10 +149,12 @@ allocated loopback ports. Do not use a production callback or provider key.
 
    ```sh
    export RESTORE_MARKER="$(date -u +%Y%m%dT%H%M%SZ)-synthetic"
-   export RESTORE_MARKER_CHARACTER_ID=998000001
+   export RESTORE_MARKER_CHARACTER_ID=4000000001 # reserved synthetic range
+   export RESTORE_MARKER_SESSION_EXPIRES_AT=$(( $(date +%s) * 1000 + 7 * 24 * 60 * 60 * 1000 ))
    SMOKE_ALLOW_WRITE=1 RESTORE_MARKER_CONFIRMATION=DISPOSABLE_LOOPBACK_ONLY \
      RESTORE_MARKER_PHASE=write RESTORE_MARKER="$RESTORE_MARKER" \
      RESTORE_MARKER_CHARACTER_ID="$RESTORE_MARKER_CHARACTER_ID" \
+     RESTORE_MARKER_SESSION_EXPIRES_AT="$RESTORE_MARKER_SESSION_EXPIRES_AT" \
      CONVEX_SELF_HOSTED_URL="http://127.0.0.1:$CONVEX_PORT" \
      bun "$repo/scripts/smoke-restore-marker.ts" | tee "$work/marker-write.log"
    ```
@@ -216,8 +223,11 @@ allocated loopback ports. Do not use a production callback or provider key.
    ```sh
    RESTORE_MARKER="$RESTORE_MARKER" \
      RESTORE_MARKER_CHARACTER_ID="$RESTORE_MARKER_CHARACTER_ID" \
+     RESTORE_MARKER_SESSION_EXPIRES_AT="$RESTORE_MARKER_SESSION_EXPIRES_AT" \
      CONVEX_SELF_HOSTED_URL="http://127.0.0.1:$CONVEX_PORT" \
      RESTORE_MARKER_PHASE=verify bun "$repo/scripts/smoke-restore-marker.ts"
+   SMOKE_ALLOW_WRITE=1 CONVEX_SELF_HOSTED_URL="http://127.0.0.1:$CONVEX_PORT" \
+     bun "$repo/scripts/smoke-convex.ts" | tee "$work/convex-restore-smoke.log"
    ```
 
    Verify:
@@ -241,6 +251,16 @@ allocated loopback ports. Do not use a production callback or provider key.
    revokes all sessions and quarantines token records, a deployment-specific
    credential-version fence, or an equivalent bounded mechanism. Record the
    maximum stale-authority window and the decision before reopening traffic.
+   If implemented for the rehearsal, run the marker check before its explicit
+   expiry window:
+
+   ```sh
+   RESTORE_MARKER="$RESTORE_MARKER" RESTORE_MARKER_CHARACTER_ID="$RESTORE_MARKER_CHARACTER_ID" \
+     RESTORE_MARKER_SESSION_EXPIRES_AT="$RESTORE_MARKER_SESSION_EXPIRES_AT" \
+     CONVEX_SELF_HOSTED_URL="http://127.0.0.1:$CONVEX_PORT" \
+     RESTORE_MARKER_PHASE=expect-invalidated bun "$repo/scripts/smoke-restore-marker.ts"
+   ```
+
    Grant rotation/quarantine behavior is unexecuted until that mechanism
    exists; no synthetic provider result can substitute for it.
 
diff --git a/scripts/smoke-restore-marker.ts b/scripts/smoke-restore-marker.ts
index a2dfd8e..bb8392d 100644
--- a/scripts/smoke-restore-marker.ts
+++ b/scripts/smoke-restore-marker.ts
@@ -4,6 +4,7 @@ import { hashSecret } from '../src/lib/server/security';
 import {
   parseRestoreMarkerPhase,
   validateRestoreMarkerTarget,
+  SYNTHETIC_CHARACTER_ID_MIN,
   validateRestoreMarkerWrite,
 } from '../src/lib/server/restore-marker';
 
@@ -15,9 +16,13 @@ validateRestoreMarkerWrite({
   allowWrite: process.env.SMOKE_ALLOW_WRITE,
   confirmation: process.env.RESTORE_MARKER_CONFIRMATION,
 });
-const characterId = Number(process.env.RESTORE_MARKER_CHARACTER_ID ?? '998000001');
+const characterId = Number(process.env.RESTORE_MARKER_CHARACTER_ID ?? String(SYNTHETIC_CHARACTER_ID_MIN + 1));
+const expiryRaw = process.env.RESTORE_MARKER_SESSION_EXPIRES_AT;
+const sessionExpiresAt = expiryRaw === undefined ? Date.now() + 7 * 24 * 60 * 60_000 : Number(expiryRaw);
 if (!marker || !/^[A-Za-z0-9._-]{8,100}$/.test(marker)) throw new Error('RESTORE_MARKER must be a synthetic 8–100 character identifier');
-if (!Number.isSafeInteger(characterId) || characterId < 90_000_000) throw new Error('RESTORE_MARKER_CHARACTER_ID must be a synthetic safe integer');
+if (!Number.isSafeInteger(characterId) || characterId < SYNTHETIC_CHARACTER_ID_MIN) throw new Error(`RESTORE_MARKER_CHARACTER_ID must be a reserved synthetic ID >= ${SYNTHETIC_CHARACTER_ID_MIN}`);
+if (!Number.isSafeInteger(sessionExpiresAt) || sessionExpiresAt <= Date.now()) throw new Error('RESTORE_MARKER_SESSION_EXPIRES_AT must be a future millisecond timestamp');
+if (phase !== 'write' && expiryRaw === undefined) throw new Error('RESTORE_MARKER_SESSION_EXPIRES_AT is required when verifying or invalidating a marker');
 const store = new ConvexStore(target.toString(), process.env.CONVEX_BRIDGE_SECRET!);
 const sessionHash = hashSecret(`restore-marker-session:${marker}`);
 const ownerHash = hashSecret(`restore-marker-owner:${marker}`);
@@ -30,20 +35,20 @@ if (phase === 'write') {
     ownerHash,
     scopes: ['esi-assets.read_assets.v1'],
     encryptedTokens: `restore-marker-placeholder:${marker}`,
-    tokenExpiresAt: now + 60_000,
+    tokenExpiresAt: sessionExpiresAt,
     sessionHash,
-    sessionExpiresAt: now + 60 * 60_000,
+    sessionExpiresAt,
   });
-  console.log(`Restore marker written: character=${characterId}, user=${user.userId}`);
+  console.log(`Restore marker written: character=${characterId}, user=${user.userId}, expiresAt=${sessionExpiresAt}`);
 } else if (phase === 'verify') {
   const session = await store.session(sessionHash);
   assert(session, 'restore marker session is missing');
   const characters = await store.characters(session.userId);
   assert(characters.some((character) => character.id === characterId && character.name === `Restore marker ${marker}`), 'restore marker character is missing or changed');
-  console.log(`Restore marker verified: character=${characterId}, user=${session.userId}`);
+  console.log(`Restore marker verified: character=${characterId}, user=${session.userId}, expiresAt=${sessionExpiresAt}`);
 } else if (phase === 'expect-invalidated') {
   assert.equal(await store.session(sessionHash), null, 'restore marker session remains usable; invalidation is incomplete');
-  console.log(`Restore marker invalidation verified: character=${characterId}`);
+  console.log(`Restore marker invalidation verified: character=${characterId}, beforeExpiresAt=${sessionExpiresAt}`);
 } else {
   throw new Error('RESTORE_MARKER_PHASE must be write, verify, or expect-invalidated');
 }
diff --git a/src/lib/server/restore-marker.ts b/src/lib/server/restore-marker.ts
index 6ff151f..7d423b4 100644
--- a/src/lib/server/restore-marker.ts
+++ b/src/lib/server/restore-marker.ts
@@ -1,4 +1,5 @@
 export const RESTORE_MARKER_CONFIRMATION = 'DISPOSABLE_LOOPBACK_ONLY';
+export const SYNTHETIC_CHARACTER_ID_MIN = 4_000_000_000;
 const LOOPBACK_HOSTS = new Set(['127.0.0.1', 'localhost', '::1', '[::1]']);
 
 export type RestoreMarkerPhase = 'verify' | 'write' | 'expect-invalidated';
diff --git a/src/routes/api/chat/+server.ts b/src/routes/api/chat/+server.ts
index d45fff5..f9d6496 100644
--- a/src/routes/api/chat/+server.ts
+++ b/src/routes/api/chat/+server.ts
@@ -10,8 +10,9 @@ import { capabilityDisabledReason, capabilityEnabled } from '$lib/server/release
 const schema = z.object({ message: z.string().trim().min(1).max(2000), requestId: z.uuid() });
 export const POST: RequestHandler = async (event) => {
   const config = configuration();
-  // Keep disabled routes from touching Convex/session/provider state. The
-  // normal user-keyed limiter is restored after session resolution below.
+  // Bound origin/session work by the existing anonymous IP bucket first. The
+  // normal authenticated user-keyed limiter is restored after resolution.
+  protectMutation(event, `chat:${event.getClientAddress()}`);
   if (!capabilityEnabled('assistant_dispatch', config.capabilityAllowlist)) {
     return json({ error: capabilityDisabledReason('assistant_dispatch') }, { status: 503 });
   }
diff --git a/src/routes/api/sync/+server.ts b/src/routes/api/sync/+server.ts
index 43215bd..4ceb8db 100644
--- a/src/routes/api/sync/+server.ts
+++ b/src/routes/api/sync/+server.ts
@@ -6,6 +6,9 @@ import { capabilityDisabledReason, capabilityEnabled } from '$lib/server/release
 import { configuration } from '$lib/server/config';
 export const POST: RequestHandler = async (event) => {
   const config = configuration();
+  // Bound origin/session work by the existing anonymous IP bucket first. The
+  // normal authenticated user-keyed limiter is restored after resolution.
+  protectMutation(event, `sync:${event.getClientAddress()}`, 6);
   if (!capabilityEnabled('asset_sync', config.capabilityAllowlist)) {
     return json({ error: capabilityDisabledReason('asset_sync') }, { status: 503 });
   }
diff --git a/tests/restore-marker.test.ts b/tests/restore-marker.test.ts
index bd5bac0..d88116c 100644
--- a/tests/restore-marker.test.ts
+++ b/tests/restore-marker.test.ts
@@ -2,6 +2,7 @@ import { expect, test } from 'bun:test';
 import {
   parseRestoreMarkerPhase,
   RESTORE_MARKER_CONFIRMATION,
+  SYNTHETIC_CHARACTER_ID_MIN,
   validateRestoreMarkerTarget,
   validateRestoreMarkerWrite,
 } from '../src/lib/server/restore-marker';
@@ -16,6 +17,7 @@ test('restore marker rejects non-loopback targets before any backend call', () =
   expect(() => validateRestoreMarkerTarget('https://production.example.test')).toThrow('loopback');
   expect(() => validateRestoreMarkerTarget('http://192.0.2.10:3210')).toThrow('loopback');
   expect(validateRestoreMarkerTarget('http://127.0.0.1:3210').hostname).toBe('127.0.0.1');
+  expect(SYNTHETIC_CHARACTER_ID_MIN).toBeGreaterThan(2_000_000_000);
 });
 
 test('restore marker requires explicit disposable confirmation for writes', () => {
diff --git a/tests/workflow-config.test.ts b/tests/workflow-config.test.ts
index 5f5c4c4..5658831 100644
--- a/tests/workflow-config.test.ts
+++ b/tests/workflow-config.test.ts
@@ -26,6 +26,8 @@ test('Gitea workflow keeps source checks separate and holds unverified container
 test('Authenticated route limits remain user-keyed after rollout gates', () => {
   expect(chatRoute).toContain('chat:${current?.userId ?? event.getClientAddress()}');
   expect(syncRoute).toContain('sync:${current?.userId ?? event.getClientAddress()}');
+  expect(chatRoute.indexOf('protectMutation')).toBeLessThan(chatRoute.indexOf('const current = await session(event)'));
+  expect(syncRoute.indexOf('protectMutation')).toBeLessThan(syncRoute.indexOf('const current = await session(event)'));
   expect(chatRoute.indexOf("capabilityEnabled('assistant_dispatch'")).toBeLessThan(chatRoute.indexOf('const current = await session(event)'));
   expect(syncRoute.indexOf("capabilityEnabled('asset_sync'")).toBeLessThan(syncRoute.indexOf('const current = await session(event)'));
   expect(layoutRoute).toContain('assistant_dispatch');