diff --git a/.changeset/25098-setup-packages-to-studio.md b/.changeset/25098-setup-packages-to-studio.md
new file mode 100644
index 00000000000..deccdfca094
--- /dev/null
+++ b/.changeset/25098-setup-packages-to-studio.md
@@ -0,0 +1,12 @@
+---
+'@objectstack/platform-objects': patch
+---
+
+feat(platform-objects): Setup no longer carries the unfiltered Packages entry; the full package list lives in Studio
+
+Clause-②: no
+Metadata-protocol: none
+
+The full `developer:packages` list is a development surface, so its one unfiltered navigation entry is now Studio's Overview → Packages, which is unchanged. Setup's `group_apps` drops its `nav_packages` entry. Setup keeps the marketplace-filtered "Installed Apps" door (`nav_marketplace_installed`, contributed by `@objectstack/cloud-connection` wherever the marketplace capability is present), so its Apps group reads Browse Marketplace, Installed Apps and Packaged Actions.
+
+The Setup copies of the entry's label (`apps.setup.navigation.nav_packages` in `en`, `zh-CN`, `ja-JP` and `es-ES`) and their recorded source hashes are removed with it; Studio's copies stay. A bookmark to the Packages page keeps working, since the page itself did not move.
diff --git a/packages/cli/test/connect-agent-both-halves-wire.pin.test.ts b/packages/cli/test/connect-agent-both-halves-wire.pin.test.ts
index a57374277f3..751241141a2 100644
--- a/packages/cli/test/connect-agent-both-halves-wire.pin.test.ts
+++ b/packages/cli/test/connect-agent-both-halves-wire.pin.test.ts
@@ -254,14 +254,15 @@ describe('#17647 — Connect-an-Agent visibility: BOTH halves, over the wire', (
             .toContain('nav_connect_agent');
         // The Setup tree the platform admin is served BY THIS COMPOSITION: 9
         // authored groups less `group_approvals`, which nothing contributes
-        // into and the filter collapses, plus the 25 entries
-        // `SETUP_NAV_CONTRIBUTIONS` carries, plus the MCP one.
+        // into and the filter collapses, plus the 24 entries
+        // `SETUP_NAV_CONTRIBUTIONS` carries, plus the MCP one. (25 until
+        // #25098 moved the unfiltered Packages entry to Studio.)
         // `nav_settings_branding` is not among them, and not because of a
         // tenancy wall (this harness boots none): since #24766 it is
         // contributed by `@objectstack/service-settings` together with the
         // `branding` namespace, offered only where no organization wall stands,
         // and this harness composes platform-objects and the MCP bundle alone.
-        expect(allowedIds).toHaveLength(34);
+        expect(allowedIds).toHaveLength(33);
         expect(allowedIds).not.toContain('nav_settings_branding');
         // The two per-user stores are reached from the User record page, not
         // from Setup's menu (#23803).
@@ -284,8 +285,8 @@ describe('#17647 — Connect-an-Agent visibility: BOTH halves, over the wire', (
         expect(withAccountHalf.statusCode).toBe(200);
         expect(withoutAccountHalf.statusCode).toBe(200);
         expect(navIds(withAccountHalf.body?.item)).toEqual(navIds(withoutAccountHalf.body?.item));
-        // 34: the composition the count in the test above states.
-        expect(navIds(withAccountHalf.body?.item)).toHaveLength(34);
+        // 33: the composition the count in the test above states.
+        expect(navIds(withAccountHalf.body?.item)).toHaveLength(33);
 
         // The mechanism behind the invariance, asserted rather than assumed:
         // the bundle aims exactly one contribution at `setup` and one at
diff --git a/packages/platform-objects/src/apps/setup-nav.contributions.ts b/packages/platform-objects/src/apps/setup-nav.contributions.ts
index e120cb385a2..e8992d3f9d5 100644
--- a/packages/platform-objects/src/apps/setup-nav.contributions.ts
+++ b/packages/platform-objects/src/apps/setup-nav.contributions.ts
@@ -39,16 +39,19 @@ export const SETUP_NAV_CONTRIBUTIONS: NavigationContribution[] = [
     ],
   },
   {
-    // Package ADMINISTRATION is a platform/operator concern (ADR-0084:
-    // packages are Operate, out of the builder) — so its home is Setup, not
-    // the application builder. The console binds `developer:packages` to the
-    // existing package-management page. Building/creating apps is a separate
-    // journey (Home cover → /studio); this entry is for install/inspect/admin.
+    // No unfiltered Packages entry here (#25098, ruling 甲 amending #23892 B):
+    // the full `developer:packages` list is a development surface, so its one
+    // unfiltered door is Studio's Overview → Packages (`studio.app.ts`). Setup
+    // reaches installed packages through the marketplace-filtered "Installed
+    // Apps" door (`nav_marketplace_installed`, `developer:packages` with
+    // `params: { source: 'marketplace' }`), which
+    // `@objectstack/cloud-connection` contributes to this group wherever the
+    // marketplace capability is present. `setup-packages-door.test.ts` pins
+    // both halves.
     app: 'setup',
     group: 'group_apps',
     priority: BASE_PRIORITY,
     items: [
-      { id: 'nav_packages', type: 'component', label: 'Packages', componentRef: 'developer:packages', icon: 'package' },
       // Packaged actions are OPERATIONAL state — on/off per packaged action
       // (ADR-0126 §7.4: "Studio keeps the editing; Setup gets the operational
       // state"). ADR-0146 D4 keeps the action switch here while the flow
diff --git a/packages/platform-objects/src/apps/setup-packaged-actions-nav.test.ts b/packages/platform-objects/src/apps/setup-packaged-actions-nav.test.ts
index 782109d709e..c1e5eacaeb2 100644
--- a/packages/platform-objects/src/apps/setup-packaged-actions-nav.test.ts
+++ b/packages/platform-objects/src/apps/setup-packaged-actions-nav.test.ts
@@ -23,7 +23,7 @@
 //    `sys_metadata_activation` ledger this package registers (#12419) and work
 //    on compositions with NO automation service; gating the entry on that
 //    service would hide a page that still works there.
-//  - no `requiredPermissions` — matches `nav_packages` beside it: the Setup
+//  - no `requiredPermissions` — like the rest of `group_apps`: the Setup
 //    app's own `setup.access` gates the app, and the activation WRITE doors
 //    enforce `manage_metadata` / the ADR-0126 §5 operator gate server-side.
 import { describe, it, expect } from 'vitest';
@@ -72,7 +72,7 @@ describe('the Setup Packaged Actions entry targets the console component (ADR-01
     });
   });
 
-  it('lives in group_apps beside Packages — package administration is Operate (ADR-0084)', () => {
+  it('lives in group_apps — operational package state is Operate (ADR-0084)', () => {
     expect(entry().group).toBe('group_apps');
   });
 
@@ -93,8 +93,10 @@ describe('the Setup Packaged Actions entry targets the console component (ADR-01
 describe('Setup › Packaged automation stays retired (ADR-0146 D11)', () => {
   it('no entry names the retired id or the retired `automation:packaged` ref', () => {
     const items = allItems().map(({ item }) => item);
-    // Control: the walk reads the real array.
-    expect(items.some((i) => i.id === 'nav_packages')).toBe(true);
+    // Control: the walk reads the real array. (It used to name Setup's
+    // `nav_packages`, which moved to Studio in #25098;
+    // `setup-packages-door.test.ts` pins that move.)
+    expect(items.some((i) => i.id === 'nav_packaged_actions')).toBe(true);
     expect(items.filter((i) => i.id === 'nav_packaged_automation')).toEqual([]);
     expect(items.filter((i) => i.componentRef === 'automation:packaged')).toEqual([]);
   });
diff --git a/packages/platform-objects/src/apps/setup-packages-door.test.ts b/packages/platform-objects/src/apps/setup-packages-door.test.ts
new file mode 100644
index 00000000000..03e76374b5e
--- /dev/null
+++ b/packages/platform-objects/src/apps/setup-packages-door.test.ts
@@ -0,0 +1,83 @@
+// Copyright (c) 2026 ObjectStack. Licensed under the Apache-2.0 license.
+//
+// The full package list lives in Studio; Setup carries no unfiltered door to it
+// (#25098, ruling 甲 amending #23892 ruling B).
+//
+// The console's `developer:packages` component is the one list of what is
+// installed. Opened with no `source` filter it is a development surface, so its
+// unfiltered entry lives in Studio only (Overview → Packages). Setup reaches
+// installed packages through the marketplace-filtered "Installed Apps" door —
+// `developer:packages` with `params: { source: 'marketplace' }` — which
+// `@objectstack/cloud-connection` contributes to Setup's `group_apps` wherever
+// the marketplace capability is present, and pins on its side
+// (`marketplace-installed-ui-entry.pin.test.ts`).
+//
+// This file is the platform-objects half: what THIS package ships for each app.
+// Both directions are pinned, because either regression is silent at runtime —
+// an unfiltered Setup entry simply renders, and a Studio entry that goes
+// missing leaves the full list reachable only by a hand-typed URL.
+import { describe, it, expect } from 'vitest';
+
+import { SETUP_APP } from './setup.app.js';
+import { SETUP_NAV_CONTRIBUTIONS } from './setup-nav.contributions.js';
+import { STUDIO_APP } from './studio.app.js';
+
+type NavItem = {
+  id?: string;
+  type?: string;
+  componentRef?: string;
+  params?: Record<string, unknown>;
+  children?: NavItem[];
+};
+
+const PACKAGES_REF = 'developer:packages';
+
+/** Every nav item in a tree, depth-first. */
+const walk = (items: unknown[] | undefined, out: NavItem[] = []): NavItem[] => {
+  for (const raw of items ?? []) {
+    const item = raw as NavItem | undefined;
+    if (!item) continue;
+    out.push(item);
+    if (Array.isArray(item.children)) walk(item.children, out);
+  }
+  return out;
+};
+
+/** A `developer:packages` entry with no `source` filter: the full list. */
+const isUnfilteredPackagesDoor = (item: NavItem): boolean =>
+  item.componentRef === PACKAGES_REF && item.params?.source === undefined;
+
+const setupItems = (): NavItem[] => [
+  ...walk(SETUP_APP.navigation as unknown[]),
+  ...SETUP_NAV_CONTRIBUTIONS.flatMap((c) => walk(c.items as unknown[])),
+];
+
+describe('the unfiltered package list is a Studio surface, not a Setup one (#25098)', () => {
+  it('the predicate tells the full list from the marketplace-filtered door', () => {
+    // Controls on the predicate itself, so the absence below cannot pass
+    // because the predicate matches nothing.
+    expect(isUnfilteredPackagesDoor({ type: 'component', componentRef: PACKAGES_REF })).toBe(true);
+    expect(
+      isUnfilteredPackagesDoor({ type: 'component', componentRef: PACKAGES_REF, params: { source: 'marketplace' } }),
+    ).toBe(false);
+  });
+
+  it('Setup ships no unfiltered `developer:packages` entry', () => {
+    const items = setupItems();
+    // Control: the walk reads the real Setup shell and its contributions.
+    expect(items.some((i) => i.id === 'group_apps')).toBe(true);
+    expect(items.some((i) => i.id === 'nav_packaged_actions')).toBe(true);
+
+    expect(items.filter(isUnfilteredPackagesDoor)).toEqual([]);
+    expect(items.filter((i) => i.id === 'nav_packages')).toEqual([]);
+  });
+
+  it('Studio still ships the unfiltered entry, under Overview', () => {
+    const overview = walk(STUDIO_APP.navigation as unknown[]).find((i) => i.id === 'group_overview');
+    expect(overview, 'Studio lost its group_overview').toBeDefined();
+
+    const doors = walk(overview!.children).filter(isUnfilteredPackagesDoor);
+    expect(doors).toHaveLength(1);
+    expect(doors[0]).toMatchObject({ id: 'nav_packages', type: 'component', componentRef: PACKAGES_REF });
+  });
+});
diff --git a/packages/platform-objects/src/apps/translations/en.ts b/packages/platform-objects/src/apps/translations/en.ts
index cdaddf1efbd..9f7486d75a7 100644
--- a/packages/platform-objects/src/apps/translations/en.ts
+++ b/packages/platform-objects/src/apps/translations/en.ts
@@ -70,12 +70,6 @@ export const en: TranslationData = {
         nav_system_overview: { label: 'System Overview' },
 
         // Apps / Marketplace
-        // `nav_packages` is a SETUP entry (package administration is an
-        // operator concern — ADR-0084), distinct from the same-id entry under
-        // `apps.studio.navigation`. Two apps carrying one nav id is normal;
-        // each app resolves its own subtree, so the studio copy never answers
-        // for this one. Its absence here was #5750's first cause.
-        nav_packages: { label: 'Packages' },
         nav_packaged_actions: { label: 'Packaged Actions' },
         nav_marketplace_browse: { label: 'Browse Marketplace' },
         nav_marketplace_installed: { label: 'Installed Apps' },
diff --git a/packages/platform-objects/src/apps/translations/es-ES.source-hashes.ts b/packages/platform-objects/src/apps/translations/es-ES.source-hashes.ts
index b1a34935c5f..e1673e5ad08 100644
--- a/packages/platform-objects/src/apps/translations/es-ES.source-hashes.ts
+++ b/packages/platform-objects/src/apps/translations/es-ES.source-hashes.ts
@@ -71,7 +71,6 @@ export const esESSourceHashes: Readonly<Record<string, string>> = {
   'apps.setup.description': 'deacdfc679232a4a',
   'apps.setup.navigation.group_overview.label': 'eebdbe1cc7b59cdf',
   'apps.setup.navigation.group_apps.label': '699b367291abcbe6',
-  'apps.setup.navigation.nav_packages.label': '8cd8f29658025f73',
   'apps.setup.navigation.nav_packaged_actions.label': '0d86b11df972dff3',
   'apps.setup.navigation.nav_marketplace_browse.label': '2afbe021f5419fdd',
   'apps.setup.navigation.nav_marketplace_installed.label': '93bd5d458e05db60',
diff --git a/packages/platform-objects/src/apps/translations/es-ES.ts b/packages/platform-objects/src/apps/translations/es-ES.ts
index 4e2f74aece4..c3829fc56d1 100644
--- a/packages/platform-objects/src/apps/translations/es-ES.ts
+++ b/packages/platform-objects/src/apps/translations/es-ES.ts
@@ -36,9 +36,6 @@ export const esES: TranslationData = {
       navigation: {
         group_overview: { label: 'Resumen' },
         group_apps: { label: 'Aplicaciones' },
-        // Setup's own `nav_packages` — distinct from the same id under
-        // `apps.studio.navigation`, which does not answer for this app (#5750).
-        nav_packages: { label: 'Paquetes' },
         nav_packaged_actions: { label: 'Acciones empaquetadas' },
         nav_marketplace_browse: { label: 'Explorar Marketplace' },
         nav_marketplace_installed: { label: 'Aplicaciones instaladas' },
diff --git a/packages/platform-objects/src/apps/translations/ja-JP.source-hashes.ts b/packages/platform-objects/src/apps/translations/ja-JP.source-hashes.ts
index b0ada86f820..56853d088ff 100644
--- a/packages/platform-objects/src/apps/translations/ja-JP.source-hashes.ts
+++ b/packages/platform-objects/src/apps/translations/ja-JP.source-hashes.ts
@@ -71,7 +71,6 @@ export const jaJPSourceHashes: Readonly<Record<string, string>> = {
   'apps.setup.description': 'deacdfc679232a4a',
   'apps.setup.navigation.group_overview.label': 'eebdbe1cc7b59cdf',
   'apps.setup.navigation.group_apps.label': '699b367291abcbe6',
-  'apps.setup.navigation.nav_packages.label': '8cd8f29658025f73',
   'apps.setup.navigation.nav_packaged_actions.label': '0d86b11df972dff3',
   'apps.setup.navigation.nav_marketplace_browse.label': '2afbe021f5419fdd',
   'apps.setup.navigation.nav_marketplace_installed.label': '93bd5d458e05db60',
diff --git a/packages/platform-objects/src/apps/translations/ja-JP.ts b/packages/platform-objects/src/apps/translations/ja-JP.ts
index 89a8f775e7c..c774f18a705 100644
--- a/packages/platform-objects/src/apps/translations/ja-JP.ts
+++ b/packages/platform-objects/src/apps/translations/ja-JP.ts
@@ -36,9 +36,6 @@ export const jaJP: TranslationData = {
       navigation: {
         group_overview: { label: '概要' },
         group_apps: { label: 'アプリ' },
-        // Setup's own `nav_packages` — distinct from the same id under
-        // `apps.studio.navigation`, which does not answer for this app (#5750).
-        nav_packages: { label: 'パッケージ' },
         nav_packaged_actions: { label: 'パッケージアクション' },
         nav_marketplace_browse: { label: 'マーケットプレイスを閲覧' },
         nav_marketplace_installed: { label: 'インストール済みアプリ' },
diff --git a/packages/platform-objects/src/apps/translations/zh-CN.source-hashes.ts b/packages/platform-objects/src/apps/translations/zh-CN.source-hashes.ts
index ec80aaf76b4..f6686899170 100644
--- a/packages/platform-objects/src/apps/translations/zh-CN.source-hashes.ts
+++ b/packages/platform-objects/src/apps/translations/zh-CN.source-hashes.ts
@@ -71,7 +71,6 @@ export const zhCNSourceHashes: Readonly<Record<string, string>> = {
   'apps.setup.description': 'deacdfc679232a4a',
   'apps.setup.navigation.group_overview.label': 'eebdbe1cc7b59cdf',
   'apps.setup.navigation.group_apps.label': '699b367291abcbe6',
-  'apps.setup.navigation.nav_packages.label': '8cd8f29658025f73',
   'apps.setup.navigation.nav_packaged_actions.label': '0d86b11df972dff3',
   'apps.setup.navigation.nav_marketplace_browse.label': '2afbe021f5419fdd',
   'apps.setup.navigation.nav_marketplace_installed.label': '93bd5d458e05db60',
diff --git a/packages/platform-objects/src/apps/translations/zh-CN.ts b/packages/platform-objects/src/apps/translations/zh-CN.ts
index ca51232285d..d748ede03be 100644
--- a/packages/platform-objects/src/apps/translations/zh-CN.ts
+++ b/packages/platform-objects/src/apps/translations/zh-CN.ts
@@ -36,12 +36,6 @@ export const zhCN: TranslationData = {
       navigation: {
         group_overview: { label: '总览' },
         group_apps: { label: '应用' },
-        // The Setup app's own `nav_packages`. A translation for this id already
-        // existed under `apps.studio.navigation` and did NOT answer here — the
-        // lookup is per app — so Setup fell back to the author's 'Packages'
-        // literal in an otherwise Chinese menu (#5750). Both entries are
-        // legitimate; keep them both.
-        nav_packages: { label: '软件包' },
         nav_packaged_actions: { label: '打包动作' },
         nav_marketplace_browse: { label: '浏览应用市场' },
         nav_marketplace_installed: { label: '已安装应用' },