diff --git a/apps/server/src/collaboration/constants.ts b/apps/server/src/collaboration/constants.ts
index 8ce8c825..9401d973 100644
--- a/apps/server/src/collaboration/constants.ts
+++ b/apps/server/src/collaboration/constants.ts
@@ -1,3 +1,10 @@
 export const HISTORY_INTERVAL = 5 * 60 * 1000;
 export const HISTORY_FAST_INTERVAL = 60 * 1000;
 export const HISTORY_FAST_THRESHOLD = 5 * 60 * 1000;
+
+// #348 — debounce window for the per-page RAG re-embed job. Repeated saves
+// within this window collapse to a single delayed job (coalesced by a stable
+// jobId), so active editing does not pile up expensive re-embeds (external API
+// + page_embeddings rewrite, concurrency 1). The worker reads the CURRENT page
+// state at run time, so the last content within the window wins.
+export const EMBED_DEBOUNCE_MS = 30 * 1000;
diff --git a/apps/server/src/collaboration/extensions/persistence-store.spec.ts b/apps/server/src/collaboration/extensions/persistence-store.spec.ts
index e707290f..122356bb 100644
--- a/apps/server/src/collaboration/extensions/persistence-store.spec.ts
+++ b/apps/server/src/collaboration/extensions/persistence-store.spec.ts
@@ -431,7 +431,17 @@ describe('PersistenceExtension.onStoreDocument — Approach-A boundary snapshot'
   it('uses the canonical page.id (not the slugId doc name) for post-store side effects (#260)', async () => {
     const SLUG = 'slug-1'; // persistedHumanPage.slugId; findById resolves it
     const document = ydocFor(doc('NEW AGENT CONTENT'));
-    pageRepo.findById.mockResolvedValue(persistedHumanPage('NEW AGENT CONTENT'));
+    // #348 — the transclusion sync now runs only when the new OR the previously
+    // persisted content carries a transclusion-family node. Give the persisted
+    // (old) content a pageEmbed so the sync path is exercised and the #260
+    // UUID-vs-slugId contract asserted below is still verified.
+    pageRepo.findById.mockResolvedValue({
+      ...persistedHumanPage('NEW AGENT CONTENT'),
+      content: {
+        type: 'doc',
+        content: [{ type: 'pageEmbed', attrs: { sourcePageId: 'src-1' } }],
+      },
+    });
     pageHistoryRepo.findPageLastHistory.mockResolvedValue(null);
 
     // A `page.<slugId>` document name (the bug's smoking gun), agent store over
diff --git a/apps/server/src/collaboration/extensions/persistence.extension.ts b/apps/server/src/collaboration/extensions/persistence.extension.ts
index 35310cf4..b5b207fa 100644
--- a/apps/server/src/collaboration/extensions/persistence.extension.ts
+++ b/apps/server/src/collaboration/extensions/persistence.extension.ts
@@ -36,11 +36,13 @@ import {
 import { Page } from '@docmost/db/types/entity.types';
 import { CollabHistoryService } from '../services/collab-history.service';
 import {
+  EMBED_DEBOUNCE_MS,
   HISTORY_FAST_INTERVAL,
   HISTORY_FAST_THRESHOLD,
   HISTORY_INTERVAL,
 } from '../constants';
 import { TransclusionService } from '../../core/page/transclusion/transclusion.service';
+import { hasTransclusionFamilyNodes } from '../../core/page/transclusion/utils/transclusion-prosemirror.util';
 import { observeCollabStore } from '../../integrations/metrics/metrics.registry';
 
 /**
@@ -415,7 +417,18 @@ export class PersistenceExtension implements Extension {
       // Use the canonical page UUID (page.id), not the doc-name id, which may be
       // a slugId for a `page.<slugId>` doc (#260). The transclusion/reference
       // syncs write uuid-typed columns, so a slugId here threw Postgres 22P02.
-      await this.syncTransclusion(page.id, page.workspaceId, tiptapJson);
+      //
+      // #348 — skip the three sync SELECTs when neither the new content nor the
+      // previously-persisted content has any transclusion/reference/pageEmbed
+      // node: nothing to insert, and (the DB mirrors the old content) nothing to
+      // delete. Whenever either side has one, run the idempotent sync exactly as
+      // before so removals are still reconciled.
+      if (
+        hasTransclusionFamilyNodes(tiptapJson) ||
+        hasTransclusionFamilyNodes(page.content)
+      ) {
+        await this.syncTransclusion(page.id, page.workspaceId, tiptapJson);
+      }
     }
 
     if (page) {
@@ -431,7 +444,17 @@ export class PersistenceExtension implements Extension {
         (m) => m.entityId,
       );
 
-      if (userMentions.length > 0) {
+      // #348 — only enqueue when the mentioned-user set actually GAINED a member.
+      // The processor (processPageMention) already no-ops when every current
+      // mention was present before (newMentions.length === 0), so skipping the
+      // enqueue in that case is behavior-identical and avoids piling up no-op jobs
+      // on every save of a page that merely CONTAINS (unchanged) mentions.
+      const oldMentionedUserIdSet = new Set(oldMentionedUserIds);
+      const hasNewMentionedUser = userMentions.some(
+        (m) => !oldMentionedUserIdSet.has(m.entityId),
+      );
+
+      if (hasNewMentionedUser) {
         await this.notificationQueue.add(QueueJob.PAGE_MENTION_NOTIFICATION, {
           userMentions: userMentions.map((m) => ({
             userId: m.entityId,
@@ -446,12 +469,23 @@ export class PersistenceExtension implements Extension {
         } as IPageMentionNotificationJob);
       }
 
-      await this.aiQueue.add(QueueJob.PAGE_CONTENT_UPDATED, {
-        // Canonical UUID: the embedding reindex resolves pages by uuid, so a
-        // slugId here threw Postgres 22P02 invalid-uuid (#260).
-        pageIds: [page.id],
-        workspaceId: page.workspaceId,
-      });
+      await this.aiQueue.add(
+        QueueJob.PAGE_CONTENT_UPDATED,
+        {
+          // Canonical UUID: the embedding reindex resolves pages by uuid, so a
+          // slugId here threw Postgres 22P02 invalid-uuid (#260).
+          pageIds: [page.id],
+          workspaceId: page.workspaceId,
+        },
+        // #348 — coalesce re-embeds during active editing. A stable per-page
+        // jobId + delay means repeated saves within EMBED_DEBOUNCE_MS collapse
+        // to one delayed job instead of one expensive re-embed per save. The
+        // worker reads the current page state at run time, so last content wins.
+        // BullMQ forbids ':' in custom job ids (Redis key separator), so '-' is
+        // used; page.id is a UUID, so the id is unique per page. removeOnComplete
+        // (queue.module) frees the id after each run so the next window re-arms.
+        { jobId: `embed-${page.id}`, delay: EMBED_DEBOUNCE_MS },
+      );
 
       await this.enqueuePageHistory(page, lastUpdatedSource);
     }
diff --git a/apps/server/src/collaboration/extensions/redis-sync/redis-sync.extension.ts b/apps/server/src/collaboration/extensions/redis-sync/redis-sync.extension.ts
index 38747465..2424d13b 100644
--- a/apps/server/src/collaboration/extensions/redis-sync/redis-sync.extension.ts
+++ b/apps/server/src/collaboration/extensions/redis-sync/redis-sync.extension.ts
@@ -220,6 +220,13 @@ export class RedisSyncExtension<TCE extends CustomEvents> implements Extension {
   };
 
   async maintainLock(documentName: string) {
+    // #348 — clear any existing timer for this document before installing a new
+    // one. Without this, a second maintainLock for the same document (a
+    // reload-without-unload) overwrites this.locks[documentName] and leaks the
+    // previous interval, which keeps firing SET forever with no way to clear it.
+    if (this.locks[documentName]) {
+      clearInterval(this.locks[documentName]);
+    }
     this.locks[documentName] = setInterval(() => {
       this.pub.set(
         this.getKey(documentName),
diff --git a/apps/server/src/common/helpers/cache-keys.ts b/apps/server/src/common/helpers/cache-keys.ts
index 38b24d20..128501ca 100644
--- a/apps/server/src/common/helpers/cache-keys.ts
+++ b/apps/server/src/common/helpers/cache-keys.ts
@@ -4,8 +4,21 @@ export const CacheKey = {
     `perm:space-roles:${userId}:${spaceId}`,
   PAGE_CAN_EDIT: (userId: string, pageId: string) =>
     `perm:can-edit:${userId}:${pageId}`,
+  // #348 — DomainMiddleware workspace resolution. Self-hosted resolves the single
+  // workspace (constant key); cloud resolves by the request subdomain (lowercased
+  // to match the case-insensitive `LOWER(hostname)` lookup). Every WorkspaceRepo
+  // mutator busts these, so staleness is bounded by both explicit invalidation and
+  // the short TTL below.
+  WORKSPACE_SELF_HOSTED: 'workspace:self-hosted',
+  WORKSPACE_BY_HOST: (subdomain: string) =>
+    `workspace:byhost:${subdomain.toLowerCase()}`,
 };
 
 // Permission caches dedupe repeated checks within and across short request bursts.
 // 5s keeps staleness on revocations bounded.
 export const PERMISSION_CACHE_TTL_MS = 5_000;
+
+// #348 — workspace row changes rarely; a short TTL bounds staleness of
+// security-relevant fields (enforceSso/enforceMfa/status) even if an explicit
+// bust is ever missed, while still removing the per-request workspace query.
+export const WORKSPACE_CACHE_TTL_MS = 15_000;
diff --git a/apps/server/src/common/middlewares/domain.middleware.ts b/apps/server/src/common/middlewares/domain.middleware.ts
index 1a2400b8..cc21fcc5 100644
--- a/apps/server/src/common/middlewares/domain.middleware.ts
+++ b/apps/server/src/common/middlewares/domain.middleware.ts
@@ -1,13 +1,42 @@
-import { Injectable, NestMiddleware, NotFoundException } from '@nestjs/common';
+import { Inject, Injectable, NestMiddleware } from '@nestjs/common';
 import { FastifyRequest, FastifyReply } from 'fastify';
+import { CACHE_MANAGER } from '@nestjs/cache-manager';
+import { Cache } from 'cache-manager';
 import { EnvironmentService } from '../../integrations/environment/environment.service';
 import { WorkspaceRepo } from '@docmost/db/repos/workspace/workspace.repo';
+import { Workspace } from '@docmost/db/types/entity.types';
+import { withCache } from '../helpers/with-cache';
+import { CacheKey, WORKSPACE_CACHE_TTL_MS } from '../helpers/cache-keys';
+
+// #348 — timestamptz columns on the workspace row. The cache store (Keyv/Redis)
+// JSON-serializes values, so a cached workspace comes back with these fields as
+// ISO strings. Reviving them to Date keeps the cached path byte-identical to the
+// direct DB path (postgres.js returns Date), so nothing downstream can observe a
+// cache hit vs miss. Idempotent: `new Date(date)` on an already-Date value is a
+// no-op-equivalent. Keep in sync with the workspace timestamptz columns.
+const WORKSPACE_DATE_FIELDS: Array<keyof Workspace> = [
+  'createdAt',
+  'updatedAt',
+  'deletedAt',
+  'trialEndAt',
+];
+
+function reviveWorkspaceDates(workspace: Workspace): Workspace {
+  for (const field of WORKSPACE_DATE_FIELDS) {
+    const value = workspace[field];
+    if (value != null) {
+      (workspace as any)[field] = new Date(value as any);
+    }
+  }
+  return workspace;
+}
 
 @Injectable()
 export class DomainMiddleware implements NestMiddleware {
   constructor(
     private workspaceRepo: WorkspaceRepo,
     private environmentService: EnvironmentService,
+    @Inject(CACHE_MANAGER) private readonly cacheManager: Cache,
   ) {}
   async use(
     req: FastifyRequest['raw'],
@@ -15,13 +44,21 @@ export class DomainMiddleware implements NestMiddleware {
     next: () => void,
   ) {
     if (this.environmentService.isSelfHosted()) {
-      const workspace = await this.workspaceRepo.findFirst();
+      // #348 — cache the single-workspace lookup that runs on every request.
+      // Invalidated by every WorkspaceRepo mutator (see bustWorkspaceCache).
+      const workspace = await withCache(
+        this.cacheManager,
+        CacheKey.WORKSPACE_SELF_HOSTED,
+        WORKSPACE_CACHE_TTL_MS,
+        () => this.workspaceRepo.findFirst(),
+      );
       if (!workspace) {
         //throw new NotFoundException('Workspace not found');
         (req as any).workspaceId = null;
         return next();
       }
 
+      reviveWorkspaceDates(workspace);
       // TODO: unify
       (req as any).workspaceId = workspace.id;
       (req as any).workspace = workspace;
@@ -29,13 +66,21 @@ export class DomainMiddleware implements NestMiddleware {
       const header = req.headers.host;
       const subdomain = header.split('.')[0];
 
-      const workspace = await this.workspaceRepo.findByHostname(subdomain);
+      // #348 — cache per-subdomain workspace resolution. Keyed by subdomain (the
+      // hostname column); busted per hostname by every WorkspaceRepo mutator.
+      const workspace = await withCache(
+        this.cacheManager,
+        CacheKey.WORKSPACE_BY_HOST(subdomain),
+        WORKSPACE_CACHE_TTL_MS,
+        () => this.workspaceRepo.findByHostname(subdomain),
+      );
 
       if (!workspace) {
         (req as any).workspaceId = null;
         return next();
       }
 
+      reviveWorkspaceDates(workspace);
       (req as any).workspaceId = workspace.id;
       (req as any).workspace = workspace;
     }
diff --git a/apps/server/src/core/auth/strategies/jwt.strategy.ts b/apps/server/src/core/auth/strategies/jwt.strategy.ts
index 024b05de..9e5604a9 100644
--- a/apps/server/src/core/auth/strategies/jwt.strategy.ts
+++ b/apps/server/src/core/auth/strategies/jwt.strategy.ts
@@ -51,7 +51,21 @@ export class JwtStrategy extends PassportStrategy(Strategy, 'jwt') {
       throw new UnauthorizedException();
     }
 
-    const workspace = await this.workspaceRepo.findById(payload.workspaceId);
+    // #348 — reuse the workspace DomainMiddleware already loaded for this request
+    // instead of re-querying it. `validate()` above has confirmed
+    // `req.raw.workspaceId === payload.workspaceId` (or that it is unset), and the
+    // middleware sets `req.raw.workspace` alongside `req.raw.workspaceId` from the
+    // SAME workspace row, so when the ids match this is that row. NOTE it is the
+    // middleware's `selectAll` object (a superset of the fallback `findById` base
+    // fields — it also carries licenseKey/auditRetentionDays); that is harmless
+    // here because every consumer reads this workspace via the AuthWorkspace
+    // decorator, which already preferred `req.raw.workspace` (the selectAll object)
+    // over `req.user.workspace` before this change. Fall back to the query if the
+    // middleware did not populate it (a path that bypasses DomainMiddleware).
+    const workspace =
+      req.raw.workspace && req.raw.workspaceId === payload.workspaceId
+        ? req.raw.workspace
+        : await this.workspaceRepo.findById(payload.workspaceId);
 
     if (!workspace) {
       throw new UnauthorizedException();
diff --git a/apps/server/src/core/favorite/services/favorite.service.ts b/apps/server/src/core/favorite/services/favorite.service.ts
index 79902e64..c3e9a0ae 100644
--- a/apps/server/src/core/favorite/services/favorite.service.ts
+++ b/apps/server/src/core/favorite/services/favorite.service.ts
@@ -38,6 +38,8 @@ export class FavoriteService {
         await this.pagePermissionRepo.filterAccessiblePageIds({
           pageIds: result.items,
           userId,
+          // #348 — favorites load at app-start; enable the workspace short-circuit.
+          workspaceId,
         });
       const accessibleSet = new Set(accessibleIds);
       result.items = result.items.filter((id) => accessibleSet.has(id));
@@ -125,6 +127,8 @@ export class FavoriteService {
         await this.pagePermissionRepo.filterAccessiblePageIds({
           pageIds,
           userId,
+          // #348 — workspace-level short-circuit for the favorites list.
+          workspaceId,
         });
       accessiblePageSet = new Set(accessibleIds);
     }
diff --git a/apps/server/src/core/notification/notification.controller.ts b/apps/server/src/core/notification/notification.controller.ts
index be5ee1d3..c5fec794 100644
--- a/apps/server/src/core/notification/notification.controller.ts
+++ b/apps/server/src/core/notification/notification.controller.ts
@@ -23,7 +23,12 @@ export class NotificationController {
     @Body() dto: ListNotificationsDto,
     @AuthUser() user: User,
   ) {
-    return this.notificationService.findByUserId(user.id, dto, dto.type);
+    return this.notificationService.findByUserId(
+      user.id,
+      dto,
+      dto.type,
+      user.workspaceId,
+    );
   }
 
   @HttpCode(HttpStatus.OK)
diff --git a/apps/server/src/core/notification/notification.service.ts b/apps/server/src/core/notification/notification.service.ts
index 1f88bf59..73450a50 100644
--- a/apps/server/src/core/notification/notification.service.ts
+++ b/apps/server/src/core/notification/notification.service.ts
@@ -45,6 +45,7 @@ export class NotificationService {
     userId: string,
     pagination: PaginationOptions,
     type: NotificationTab = 'all',
+    workspaceId?: string | null,
   ) {
     const result = await this.notificationRepo.findByUserId(
       userId,
@@ -61,6 +62,8 @@ export class NotificationService {
         await this.pagePermissionRepo.filterAccessiblePageIds({
           pageIds,
           userId,
+          // #348 — notifications list; enable the workspace short-circuit.
+          workspaceId,
         });
       const accessibleSet = new Set(accessiblePageIds);
 
diff --git a/apps/server/src/core/page/page.controller.ts b/apps/server/src/core/page/page.controller.ts
index fd5c866e..05b363e0 100644
--- a/apps/server/src/core/page/page.controller.ts
+++ b/apps/server/src/core/page/page.controller.ts
@@ -446,7 +446,11 @@ export class PageController {
       );
     }
 
-    return this.pageService.getRecentPages(user.id, pagination);
+    return this.pageService.getRecentPages(
+      user.id,
+      pagination,
+      user.workspaceId,
+    );
   }
 
   @HttpCode(HttpStatus.OK)
@@ -469,7 +473,13 @@ export class PageController {
       }
     }
 
-    return this.pageService.getCreatedByPages(targetUserId, user.id, pagination, dto.spaceId);
+    return this.pageService.getCreatedByPages(
+      targetUserId,
+      user.id,
+      pagination,
+      dto.spaceId,
+      user.workspaceId,
+    );
   }
 
   @HttpCode(HttpStatus.OK)
diff --git a/apps/server/src/core/page/services/page.service.ts b/apps/server/src/core/page/services/page.service.ts
index c6ee150d..cd87a489 100644
--- a/apps/server/src/core/page/services/page.service.ts
+++ b/apps/server/src/core/page/services/page.service.ts
@@ -1163,6 +1163,7 @@ export class PageService {
   async getRecentPages(
     userId: string,
     pagination: PaginationOptions,
+    workspaceId?: string | null,
   ): Promise<CursorPaginationResult<Page>> {
     const result = await this.pageRepo.getRecentPages(userId, pagination);
 
@@ -1172,6 +1173,8 @@ export class PageService {
         await this.pagePermissionRepo.filterAccessiblePageIds({
           pageIds,
           userId,
+          // #348 — cross-space "recent"; enable the workspace short-circuit.
+          workspaceId,
         });
       const accessibleSet = new Set(accessibleIds);
       result.items = result.items.filter((p) => accessibleSet.has(p.id));
@@ -1185,6 +1188,7 @@ export class PageService {
     requestingUserId: string,
     pagination: PaginationOptions,
     spaceId?: string,
+    workspaceId?: string | null,
   ): Promise<CursorPaginationResult<Page>> {
     const result = await this.pageRepo.getCreatedByPages(
       creatorId,
@@ -1199,6 +1203,9 @@ export class PageService {
         await this.pagePermissionRepo.filterAccessiblePageIds({
           pageIds,
           userId: requestingUserId,
+          spaceId,
+          // #348 — enable the workspace short-circuit when not space-scoped.
+          workspaceId,
         });
       const accessibleSet = new Set(accessibleIds);
       result.items = result.items.filter((p) => accessibleSet.has(p.id));
diff --git a/apps/server/src/core/page/transclusion/utils/transclusion-prosemirror.util.ts b/apps/server/src/core/page/transclusion/utils/transclusion-prosemirror.util.ts
index c49b1bf5..b2592f61 100644
--- a/apps/server/src/core/page/transclusion/utils/transclusion-prosemirror.util.ts
+++ b/apps/server/src/core/page/transclusion/utils/transclusion-prosemirror.util.ts
@@ -93,6 +93,41 @@ function collectNodes<T>(
   return Array.from(byKey.values());
 }
 
+/**
+ * #348 — cheap early-exit probe: does this doc contain ANY node the transclusion
+ * syncs care about (`transclusionSource` / `transclusionReference` / `pageEmbed`)?
+ * Lets the collab store skip the three sync SELECTs when neither the previous nor
+ * the new content has any such node — there is nothing to insert, and (since the
+ * DB mirrors the previously-persisted content) nothing to delete. Walks once and
+ * short-circuits on the first match; uses the same depth ceiling as the
+ * collectors. Deliberately does NOT skip `transclusionSource` subtrees: it only
+ * answers "any node present?", so descending everywhere is strictly conservative
+ * (it can never wrongly report "none").
+ */
+export function hasTransclusionFamilyNodes(doc: unknown): boolean {
+  const visit = (node: any, depth: number): boolean => {
+    if (!node || typeof node !== 'object') return false;
+    if (depth > MAX_PM_WALK_DEPTH) return false;
+
+    if (
+      node.type === TRANSCLUSION_TYPE ||
+      node.type === REFERENCE_TYPE ||
+      node.type === PAGE_EMBED_TYPE
+    ) {
+      return true;
+    }
+
+    if (Array.isArray(node.content)) {
+      for (const child of node.content) {
+        if (visit(child, depth + 1)) return true;
+      }
+    }
+    return false;
+  };
+
+  return visit(doc, 0);
+}
+
 /**
  * Walks a ProseMirror JSON document and returns one snapshot per top-level
  * `transclusion` node. Does not recurse into transclusions (schema disallows
diff --git a/apps/server/src/core/search/search.service.ts b/apps/server/src/core/search/search.service.ts
index f844941e..91e5e5f4 100644
--- a/apps/server/src/core/search/search.service.ts
+++ b/apps/server/src/core/search/search.service.ts
@@ -155,6 +155,8 @@ export class SearchService {
           pageIds,
           userId: opts.userId,
           spaceId: searchParams.spaceId,
+          // #348 — enables the workspace-level short-circuit when not space-scoped.
+          workspaceId: opts.workspaceId,
         });
       const accessibleSet = new Set(accessibleIds);
       results = results.filter((r: any) => accessibleSet.has(r.id));
@@ -266,6 +268,8 @@ export class SearchService {
           await this.pagePermissionRepo.filterAccessiblePageIds({
             pageIds,
             userId,
+            // #348 — workspace-level short-circuit for the suggest path.
+            workspaceId,
           });
         const accessibleSet = new Set(accessibleIds);
         pages = pages.filter((p) => accessibleSet.has(p.id));
diff --git a/apps/server/src/database/migrations/20260705T120000-perf-indexes.ts b/apps/server/src/database/migrations/20260705T120000-perf-indexes.ts
new file mode 100644
index 00000000..b39112d4
--- /dev/null
+++ b/apps/server/src/database/migrations/20260705T120000-perf-indexes.ts
@@ -0,0 +1,118 @@
+import { type Kysely, sql } from 'kysely';
+
+/**
+ * #348 — targeted hot-path indexes.
+ *
+ * 1. GIN trigram indexes for `/search/suggest`. That endpoint runs a
+ *    leading-wildcard `LOWER(f_unaccent(col)) LIKE '%q%'` per keystroke, which
+ *    is a sequential scan without a trigram index. The index EXPRESSIONS below
+ *    are `LOWER(f_unaccent(title|name))`, matching the predicates in
+ *    search.service.ts exactly so the planner uses them (verified with EXPLAIN:
+ *    the suggest predicate resolves to a Bitmap Index Scan on these indexes).
+ *
+ *    IMMUTABLE-wrapper fix (required for the index to build): `f_unaccent` was
+ *    defined as `SELECT unaccent('unaccent', $1)` (the two-arg, dictionary-named
+ *    unaccent). That body CANNOT be used in an index expression: when Postgres
+ *    inlines the IMMUTABLE SQL wrapper while building the index it fails to
+ *    resolve the two-arg call (`function unaccent(unknown, text) does not exist`,
+ *    the `'unaccent'` literal loses its regdictionary coercion). The single-arg
+ *    `unaccent($1)` is the same operation (the default text-search dictionary IS
+ *    `unaccent`; verified byte-equal on accented samples), and — crucially —
+ *    SCHEMA-QUALIFIED as `public.unaccent($1)` it inlines cleanly, so the index
+ *    builds. We therefore `CREATE OR REPLACE` `f_unaccent` to the qualified
+ *    single-arg body. This is output-identical for every existing caller (the
+ *    tsvector trigger, the main `tsv @@` search, and the suggest LIKE), so no
+ *    reindex/backfill is needed; `down()` restores the original two-arg body.
+ *    (The `unaccent` extension is installed in `public` in this codebase, which
+ *    is why `public.unaccent` is the correct qualification.)
+ *
+ * 2. Composite indexes for two ORDER-BY-only-on-id queries that currently sort
+ *    on top of a created_at index:
+ *    - page_history: `findPageHistoryByPageId` does WHERE page_id ORDER BY id
+ *      DESC, but only `(page_id, created_at DESC)` exists → extra sort.
+ *    - comments: `findPageComments` does WHERE page_id ORDER BY id ASC, but only
+ *      `(page_id)` exists → extra sort.
+ *
+ * DEPLOY-TIME LOCK WARNING: these are plain (non-CONCURRENT) CREATE INDEX
+ * statements — CONCURRENTLY is impossible because Kysely runs each migration in a
+ * transaction. They take a SHARE lock that BLOCKS writes (INSERT/UPDATE/DELETE) on
+ * pages/users/groups/comments/page_history for the duration of the build. The two
+ * GIN trigram builds on pages.title / users.name are the slow ones and can take
+ * minutes on a large tenant → a write-outage window during the deploy migration.
+ * For large installations, run this migration in a maintenance window, or build
+ * the trigram indexes out-of-band with CREATE INDEX CONCURRENTLY before deploying
+ * (then this migration's `IF NOT EXISTS` is a no-op). Small/typical tenants are
+ * unaffected.
+ */
+export async function up(db: Kysely<any>): Promise<void> {
+  // Index-compatible, output-identical redefinition of f_unaccent (see header).
+  await sql`
+    CREATE OR REPLACE FUNCTION f_unaccent(text)
+      RETURNS text
+      LANGUAGE sql
+      IMMUTABLE PARALLEL SAFE STRICT
+    AS $func$
+      SELECT public.unaccent($1);
+    $func$
+  `.execute(db);
+
+  // Search-suggest trigram indexes. Expressions match search.service.ts.
+  await sql`
+    CREATE INDEX IF NOT EXISTS idx_pages_title_trgm
+      ON pages USING gin ((LOWER(f_unaccent(title))) gin_trgm_ops)
+  `.execute(db);
+
+  await sql`
+    CREATE INDEX IF NOT EXISTS idx_users_name_trgm
+      ON users USING gin ((LOWER(f_unaccent(name))) gin_trgm_ops)
+  `.execute(db);
+
+  await sql`
+    CREATE INDEX IF NOT EXISTS idx_groups_name_trgm
+      ON groups USING gin ((LOWER(f_unaccent(name))) gin_trgm_ops)
+  `.execute(db);
+
+  // page_history: WHERE page_id ORDER BY id DESC (findPageHistoryByPageId).
+  await sql`
+    CREATE INDEX IF NOT EXISTS idx_page_history_page_id
+      ON page_history (page_id, id DESC)
+  `.execute(db);
+
+  // comments: WHERE page_id ORDER BY id ASC (findPageComments).
+  await sql`
+    CREATE INDEX IF NOT EXISTS idx_comments_page_id_id
+      ON comments (page_id, id)
+  `.execute(db);
+
+  // page_access(workspace_id): #348 made hasRestrictedPagesInWorkspace uncached
+  // (F1 fix), so `EXISTS(SELECT 1 FROM page_access WHERE workspace_id=?)` now runs
+  // per-request on every whole-workspace list endpoint (global search + suggest,
+  // favorites, notifications, recent, created-by). page_access only had a
+  // space_id index → that EXISTS was a seq scan in the common zero-restriction
+  // case. This index makes it an index-only existence probe.
+  await sql`
+    CREATE INDEX IF NOT EXISTS idx_page_access_workspace_id
+      ON page_access (workspace_id)
+  `.execute(db);
+}
+
+export async function down(db: Kysely<any>): Promise<void> {
+  // Drop the expression indexes before restoring the function body.
+  await sql`DROP INDEX IF EXISTS idx_pages_title_trgm`.execute(db);
+  await sql`DROP INDEX IF EXISTS idx_users_name_trgm`.execute(db);
+  await sql`DROP INDEX IF EXISTS idx_groups_name_trgm`.execute(db);
+  await sql`DROP INDEX IF EXISTS idx_page_history_page_id`.execute(db);
+  await sql`DROP INDEX IF EXISTS idx_comments_page_id_id`.execute(db);
+  await sql`DROP INDEX IF EXISTS idx_page_access_workspace_id`.execute(db);
+
+  // Restore the original two-arg (dictionary-named) f_unaccent body.
+  await sql`
+    CREATE OR REPLACE FUNCTION f_unaccent(text)
+      RETURNS text
+      LANGUAGE sql
+      IMMUTABLE PARALLEL SAFE STRICT
+    AS $func$
+      SELECT unaccent('unaccent', $1);
+    $func$
+  `.execute(db);
+}
diff --git a/apps/server/src/database/repos/page/page-permission.repo.ts b/apps/server/src/database/repos/page/page-permission.repo.ts
index f753526c..38e03b4e 100644
--- a/apps/server/src/database/repos/page/page-permission.repo.ts
+++ b/apps/server/src/database/repos/page/page-permission.repo.ts
@@ -657,8 +657,9 @@ export class PagePermissionRepo {
     pageIds: string[];
     userId: string;
     spaceId?: string;
+    workspaceId?: string | null;
   }): Promise<string[]> {
-    const { pageIds, userId, spaceId } = opts;
+    const { pageIds, userId, spaceId, workspaceId } = opts;
     if (pageIds.length === 0) return [];
 
     if (spaceId) {
@@ -666,6 +667,17 @@ export class PagePermissionRepo {
       if (!hasRestrictions) {
         return pageIds;
       }
+    } else if (workspaceId) {
+      // #348 — whole-workspace callers (no spaceId: favorites, notifications,
+      // recent, created-by, global search) skip the recursive-ancestor CTE + anti
+      // -join entirely when the workspace has ZERO restricted pages. When any
+      // restriction DOES exist, fall through to the identical CTE below, so
+      // behavior is unchanged whenever restrictions are present.
+      const hasRestrictions =
+        await this.hasRestrictedPagesInWorkspace(workspaceId);
+      if (!hasRestrictions) {
+        return pageIds;
+      }
     }
 
     const results = await this.db
@@ -903,6 +915,39 @@ export class PagePermissionRepo {
     return Boolean(result?.exists);
   }
 
+  /**
+   * Workspace-level analogue of hasRestrictedPagesInSpace: does ANY page in the
+   * whole workspace carry a restriction? Lets whole-workspace access filters
+   * short-circuit the recursive-ancestor CTE when nothing is restricted at all.
+   *
+   * UNCACHED (like the sibling hasRestrictedPagesInSpace) — a single cheap
+   * `EXISTS(pageAccess WHERE workspaceId=?)` per call. This is an ACCESS-CONTROL
+   * gate on whole-workspace list endpoints, so it must never go stale: caching it
+   * (even 5s) reintroduced a leak the space-path never had — a concurrent
+   * whole-workspace read in the insert->commit window of the FIRST restricted page
+   * could re-populate `false` under withCache (read-then-set, no del-during-read
+   * guard) and override the insert bust, leaking that page to unauthorized users
+   * for up to the TTL (#348 review F1). An uncached EXISTS removes both the
+   * cache/DB asymmetry with hasRestrictedPagesInSpace and that race; the space
+   * path already accepts this exact per-call cost.
+   */
+  async hasRestrictedPagesInWorkspace(workspaceId: string): Promise<boolean> {
+    const result = await this.db
+      .selectNoFrom((eb) =>
+        eb
+          .exists(
+            eb
+              .selectFrom('pageAccess')
+              .select(sql`1`.as('one'))
+              .where('pageAccess.workspaceId', '=', workspaceId),
+          )
+          .as('exists'),
+      )
+      .executeTakeFirst();
+
+    return Boolean(result?.exists);
+  }
+
   /**
    * Given a list of parent page IDs, return which ones have at least one accessible child.
    * Efficient batch query for sidebar hasChildren calculation.
diff --git a/apps/server/src/database/repos/page/page.repo.ts b/apps/server/src/database/repos/page/page.repo.ts
index c8626553..7fed922a 100644
--- a/apps/server/src/database/repos/page/page.repo.ts
+++ b/apps/server/src/database/repos/page/page.repo.ts
@@ -581,6 +581,9 @@ export class PageRepo {
     const query = this.db
       .selectFrom('pages')
       .select(this.baseFields)
+      // NOTE: `content` IS needed here — the trash UI reads page.content to render
+      // the deleted-page preview modal (trash.tsx handlePageClick ->
+      // TrashPageContentModal pageContent). Do NOT drop it (see #348 review F3).
       .select('content')
       .select((eb) => this.withSpace(eb))
       .select((eb) => this.withDeletedBy(eb))
diff --git a/apps/server/src/database/repos/workspace/workspace.repo.ts b/apps/server/src/database/repos/workspace/workspace.repo.ts
index 23ebcc67..89996766 100644
--- a/apps/server/src/database/repos/workspace/workspace.repo.ts
+++ b/apps/server/src/database/repos/workspace/workspace.repo.ts
@@ -1,4 +1,6 @@
-import { Injectable } from '@nestjs/common';
+import { Inject, Injectable } from '@nestjs/common';
+import { CACHE_MANAGER } from '@nestjs/cache-manager';
+import { Cache } from 'cache-manager';
 import { InjectKysely } from 'nestjs-kysely';
 import { KyselyDB, KyselyTransaction } from '../../types/kysely.types';
 import { dbOrTx } from '../../utils';
@@ -9,6 +11,7 @@ import {
 } from '@docmost/db/types/entity.types';
 import { ExpressionBuilder, sql } from 'kysely';
 import { DB, Workspaces } from '@docmost/db/types/db';
+import { CacheKey } from '../../../common/helpers/cache-keys';
 
 /**
  * Writable `settings.ai.provider` keys, enforced at this generic SQL layer. This
@@ -61,7 +64,34 @@ export class WorkspaceRepo {
     'temporaryNoteHours',
     'isScimEnabled',
   ];
-  constructor(@InjectKysely() private readonly db: KyselyDB) {}
+  constructor(
+    @InjectKysely() private readonly db: KyselyDB,
+    @Inject(CACHE_MANAGER) private readonly cacheManager: Cache,
+  ) {}
+
+  /**
+   * #348 — bust the DomainMiddleware workspace caches after any workspace write.
+   * Deletes BOTH the self-hosted (constant) key and the cloud per-hostname key so
+   * a single implementation covers either deployment mode (the irrelevant key is a
+   * harmless no-op). Best-effort: a cache error must never fail the write, and a
+   * missed bust is bounded by WORKSPACE_CACHE_TTL_MS. Note: a hostname RENAME only
+   * busts the NEW hostname's key (the row returned here carries the new hostname);
+   * the old key expires via TTL.
+   */
+  private async bustWorkspaceCache(
+    workspace?: Pick<Workspace, 'hostname'> | undefined,
+  ): Promise<void> {
+    try {
+      await this.cacheManager.del(CacheKey.WORKSPACE_SELF_HOSTED);
+      if (workspace?.hostname) {
+        await this.cacheManager.del(
+          CacheKey.WORKSPACE_BY_HOST(workspace.hostname),
+        );
+      }
+    } catch {
+      // cache is best-effort; TTL is the backstop
+    }
+  }
 
   async findById(
     workspaceId: string,
@@ -144,12 +174,14 @@ export class WorkspaceRepo {
     trx?: KyselyTransaction,
   ): Promise<Workspace> {
     const db = dbOrTx(this.db, trx);
-    return db
+    const workspace = await db
       .updateTable('workspaces')
       .set({ ...updatableWorkspace, updatedAt: new Date() })
       .where('id', '=', workspaceId)
       .returning(this.baseFields)
       .executeTakeFirst();
+    await this.bustWorkspaceCache(workspace);
+    return workspace;
   }
 
   async insertWorkspace(
@@ -157,11 +189,14 @@ export class WorkspaceRepo {
     trx?: KyselyTransaction,
   ): Promise<Workspace> {
     const db = dbOrTx(this.db, trx);
-    return db
+    const workspace = await db
       .insertInto('workspaces')
       .values(insertableWorkspace)
       .returning(this.baseFields)
       .executeTakeFirst();
+    // Bust the cached "not found" so a fresh install / new tenant is seen at once.
+    await this.bustWorkspaceCache(workspace);
+    return workspace;
   }
 
   async count(): Promise<number> {
@@ -203,7 +238,7 @@ export class WorkspaceRepo {
     trx?: KyselyTransaction,
   ) {
     const db = dbOrTx(this.db, trx);
-    return db
+    const workspace = await db
       .updateTable('workspaces')
       .set({
         settings: sql`COALESCE(settings, '{}'::jsonb)
@@ -214,6 +249,8 @@ export class WorkspaceRepo {
       .where('id', '=', workspaceId)
       .returning(this.baseFields)
       .executeTakeFirst();
+    await this.bustWorkspaceCache(workspace);
+    return workspace;
   }
 
   async updateAiSettings(
@@ -223,7 +260,7 @@ export class WorkspaceRepo {
     trx?: KyselyTransaction,
   ) {
     const db = dbOrTx(this.db, trx);
-    return db
+    const workspace = await db
       .updateTable('workspaces')
       .set({
         settings: sql`COALESCE(settings, '{}'::jsonb)
@@ -234,6 +271,8 @@ export class WorkspaceRepo {
       .where('id', '=', workspaceId)
       .returning(this.baseFields)
       .executeTakeFirst();
+    await this.bustWorkspaceCache(workspace);
+    return workspace;
   }
 
   /**
@@ -272,7 +311,7 @@ export class WorkspaceRepo {
           entries.flatMap(([k, v]) => [sql.lit(k), sql`${v}::text`]),
         )})`
       : sql`'{}'::jsonb`;
-    return db
+    const workspace = await db
       .updateTable('workspaces')
       .set({
         settings: sql`COALESCE(settings, '{}'::jsonb) || jsonb_build_object(
@@ -287,6 +326,8 @@ export class WorkspaceRepo {
       .where('id', '=', workspaceId)
       .returning(this.baseFields)
       .executeTakeFirst();
+    await this.bustWorkspaceCache(workspace);
+    return workspace;
   }
 
   /**
@@ -303,7 +344,7 @@ export class WorkspaceRepo {
     trx?: KyselyTransaction,
   ) {
     const db = dbOrTx(this.db, trx);
-    return db
+    const workspace = await db
       .updateTable('workspaces')
       .set({
         settings: sql`COALESCE(settings, '{}'::jsonb)
@@ -313,6 +354,8 @@ export class WorkspaceRepo {
       .where('id', '=', workspaceId)
       .returning(this.baseFields)
       .executeTakeFirst();
+    await this.bustWorkspaceCache(workspace);
+    return workspace;
   }
 
   async updateSharingSettings(
@@ -322,7 +365,7 @@ export class WorkspaceRepo {
     trx?: KyselyTransaction,
   ) {
     const db = dbOrTx(this.db, trx);
-    return db
+    const workspace = await db
       .updateTable('workspaces')
       .set({
         settings: sql`COALESCE(settings, '{}'::jsonb)
@@ -333,6 +376,8 @@ export class WorkspaceRepo {
       .where('id', '=', workspaceId)
       .returning(this.baseFields)
       .executeTakeFirst();
+    await this.bustWorkspaceCache(workspace);
+    return workspace;
   }
 
   async updateTemplateSettings(
@@ -342,7 +387,7 @@ export class WorkspaceRepo {
     trx?: KyselyTransaction,
   ) {
     const db = dbOrTx(this.db, trx);
-    return db
+    const workspace = await db
       .updateTable('workspaces')
       .set({
         settings: sql`COALESCE(settings, '{}'::jsonb)
@@ -353,6 +398,8 @@ export class WorkspaceRepo {
       .where('id', '=', workspaceId)
       .returning(this.baseFields)
       .executeTakeFirst();
+    await this.bustWorkspaceCache(workspace);
+    return workspace;
   }
 
 }
diff --git a/apps/server/test/integration/page-permission-workspace-filter.int-spec.ts b/apps/server/test/integration/page-permission-workspace-filter.int-spec.ts
new file mode 100644
index 00000000..5a5fdd32
--- /dev/null
+++ b/apps/server/test/integration/page-permission-workspace-filter.int-spec.ts
@@ -0,0 +1,113 @@
+import { Kysely } from 'kysely';
+import { PagePermissionRepo } from '@docmost/db/repos/page/page-permission.repo';
+import { GroupRepo } from '@docmost/db/repos/group/group.repo';
+import {
+  getTestDb,
+  destroyTestDb,
+  createWorkspace,
+  createSpace,
+  createUser,
+  createPage,
+} from './db';
+
+/**
+ * #348 — the whole-workspace access-filter short-circuit is an ACCESS-CONTROL
+ * path, so it must produce the SAME result as the full recursive-ancestor CTE.
+ *
+ * filterAccessiblePageIds({ workspaceId }) (no spaceId — the favorites /
+ * notifications / recent / created-by / global-search callers) skips the CTE only
+ * when the workspace has ZERO restricted pages. A page is "restricted &
+ * inaccessible" when it (or an ancestor) has a `pageAccess` row and the user has
+ * no matching `pagePermissions`. Driven against real Postgres, asserts:
+ *   1. zero restrictions -> short-circuit returns the full input set;
+ *   2. a restriction present -> the CTE runs and drops the page the user can't
+ *      reach while keeping the reachable ones (behavior unchanged);
+ *   3. inserting the FIRST pageAccess flips hasRestrictedPagesInWorkspace
+ *      false -> true immediately (the 0->1 transition — now uncached, no stale
+ *      window, review F1); it is scoped per workspace.
+ */
+describe('#348 filterAccessiblePageIds workspace short-circuit (real PG)', () => {
+  let db: Kysely<any>;
+  let repo: PagePermissionRepo;
+  let workspaceId: string;
+  let otherWorkspaceId: string;
+  let userId: string;
+  let spaceId: string;
+
+  beforeAll(async () => {
+    db = getTestDb();
+    // hasRestrictedPagesInWorkspace is now uncached, and no other cached
+    // permission path is exercised here, so a no-op cache stub suffices.
+    const cacheStub = {
+      get: async () => undefined,
+      set: async () => undefined,
+      del: async () => undefined,
+    } as never;
+    repo = new PagePermissionRepo(db, new GroupRepo(db), cacheStub);
+
+    const ws = await createWorkspace(db);
+    workspaceId = ws.id;
+    const other = await createWorkspace(db);
+    otherWorkspaceId = other.id;
+    const user = await createUser(db, workspaceId);
+    userId = user.id;
+    const space = await createSpace(db, workspaceId);
+    spaceId = space.id;
+  });
+
+  afterAll(async () => {
+    await destroyTestDb();
+  });
+
+  it('zero restrictions: short-circuit returns the full input set', async () => {
+    const p1 = await createPage(db, { workspaceId, spaceId });
+    const p2 = await createPage(db, { workspaceId, spaceId });
+
+    expect(await repo.hasRestrictedPagesInWorkspace(workspaceId)).toBe(false);
+
+    const ids = [p1.id, p2.id];
+    const filtered = await repo.filterAccessiblePageIds({
+      pageIds: ids,
+      userId,
+      workspaceId,
+    });
+    expect(new Set(filtered)).toEqual(new Set(ids));
+  });
+
+  it('a restriction present: filters out the page the user cannot reach', async () => {
+    const openPage = await createPage(db, { workspaceId, spaceId });
+    const restrictedPage = await createPage(db, { workspaceId, spaceId });
+
+    // Add a pageAccess row on restrictedPage with NO matching pagePermissions for
+    // `userId` → the CTE anti-join marks it inaccessible for this user.
+    await db
+      .insertInto('pageAccess')
+      .values({
+        pageId: restrictedPage.id,
+        workspaceId,
+        spaceId,
+        accessLevel: 'read',
+        creatorId: userId,
+      })
+      .execute();
+
+    // 0->1 transition is reflected immediately (uncached).
+    expect(await repo.hasRestrictedPagesInWorkspace(workspaceId)).toBe(true);
+
+    const filtered = await repo.filterAccessiblePageIds({
+      pageIds: [openPage.id, restrictedPage.id],
+      userId,
+      workspaceId,
+    });
+    expect(filtered).toContain(openPage.id);
+    expect(filtered).not.toContain(restrictedPage.id);
+  });
+
+  it('hasRestrictedPagesInWorkspace is scoped per workspace', async () => {
+    // The other workspace has no pageAccess rows → still false, unaffected by the
+    // restriction added above in `workspaceId`.
+    expect(await repo.hasRestrictedPagesInWorkspace(otherWorkspaceId)).toBe(
+      false,
+    );
+  });
+});
diff --git a/apps/server/test/integration/workspace-repo-update-setting.int-spec.ts b/apps/server/test/integration/workspace-repo-update-setting.int-spec.ts
index f4589e1b..6b021e31 100644
--- a/apps/server/test/integration/workspace-repo-update-setting.int-spec.ts
+++ b/apps/server/test/integration/workspace-repo-update-setting.int-spec.ts
@@ -1,7 +1,25 @@
 import { Kysely } from 'kysely';
 import { WorkspaceRepo } from '@docmost/db/repos/workspace/workspace.repo';
+import { CacheKey } from 'src/common/helpers/cache-keys';
 import { getTestDb, destroyTestDb, createWorkspace } from './db';
 
+// A minimal Map-backed cache double with a working `del` (the previous `{}` stub
+// made bustWorkspaceCache's `del` throw into its own try/catch, so the #348
+// invalidation was never actually exercised — review F6).
+function makeCacheDouble() {
+  const store = new Map<string, unknown>();
+  return {
+    store,
+    get: async (k: string) => store.get(k),
+    set: async (k: string, v: unknown) => {
+      store.set(k, v);
+    },
+    del: async (k: string) => {
+      store.delete(k);
+    },
+  };
+}
+
 /**
  * A — WorkspaceRepo.updateSetting jsonb-MERGE (the html-embed kill-switch
  * write-half). Setting a single top-level key must NOT clobber sibling
@@ -15,7 +33,9 @@ describe('WorkspaceRepo.updateSetting (jsonb merge) [integration]', () => {
   beforeAll(() => {
     db = getTestDb();
     // Repos are plain classes taking @InjectKysely() db — instantiate directly.
-    repo = new WorkspaceRepo(db as any);
+    // 2nd arg is CACHE_MANAGER (used only to bust the #348 workspace cache); a
+    // stub is fine here since bustWorkspaceCache is best-effort (try/catch).
+    repo = new WorkspaceRepo(db as any, {} as any);
   });
 
   afterAll(async () => {
@@ -58,3 +78,62 @@ describe('WorkspaceRepo.updateSetting (jsonb merge) [integration]', () => {
     expect(updated.settings).toEqual({ htmlEmbed: false });
   });
 });
+
+/**
+ * #348 F6 — the DomainMiddleware workspace cache (WORKSPACE_SELF_HOSTED /
+ * WORKSPACE_BY_HOST, 15s TTL) caches security-relevant fields (enforceSso/
+ * enforceMfa/status). Its correctness rests entirely on bustWorkspaceCache being
+ * called from every mutator. This exercises the real invalidation with a working
+ * cache double (not the {} stub, whose del throws-and-swallows): warm the cache
+ * like DomainMiddleware, mutate, and assert the busted key is gone so a stale
+ * workspace row can't outlive the mutation.
+ */
+describe('WorkspaceRepo bustWorkspaceCache invalidation [integration]', () => {
+  let db: Kysely<any>;
+
+  beforeAll(() => {
+    db = getTestDb();
+  });
+  afterAll(async () => {
+    await destroyTestDb();
+  });
+
+  it('updateSetting busts the self-hosted workspace cache key', async () => {
+    const cache = makeCacheDouble();
+    const repo = new WorkspaceRepo(db as any, cache as any);
+    const ws = await createWorkspace(db, { settings: {} });
+
+    // Warm the cache as DomainMiddleware would (self-hosted key).
+    cache.store.set(CacheKey.WORKSPACE_SELF_HOSTED, ws);
+    expect(cache.store.has(CacheKey.WORKSPACE_SELF_HOSTED)).toBe(true);
+
+    await repo.updateSetting(ws.id, 'htmlEmbed', true);
+
+    // The mutation must have invalidated the cached row.
+    expect(cache.store.has(CacheKey.WORKSPACE_SELF_HOSTED)).toBe(false);
+  });
+
+  it('updateSharingSettings busts the by-host workspace cache key too', async () => {
+    const cache = makeCacheDouble();
+    const repo = new WorkspaceRepo(db as any, cache as any);
+    const ws = await createWorkspace(db, { settings: {} });
+    // createWorkspace assigns a unique hostname; read it back for the by-host key.
+    const { hostname } = await db
+      .selectFrom('workspaces')
+      .select(['hostname'])
+      .where('id', '=', ws.id)
+      .executeTakeFirstOrThrow();
+
+    // Warm BOTH keys (self-hosted + by-host); the by-host bust needs the row's
+    // hostname, which the mutator returns from the DB.
+    cache.store.set(CacheKey.WORKSPACE_SELF_HOSTED, ws);
+    cache.store.set(CacheKey.WORKSPACE_BY_HOST(hostname as string), ws);
+
+    await repo.updateSharingSettings(ws.id, 'allowInvite', true);
+
+    expect(cache.store.has(CacheKey.WORKSPACE_SELF_HOSTED)).toBe(false);
+    expect(cache.store.has(CacheKey.WORKSPACE_BY_HOST(hostname as string))).toBe(
+      false,
+    );
+  });
+});