diff --git a/.commonplace-canonical b/.commonplace-canonical
index 21b4903d..82572382 100644
--- a/.commonplace-canonical
+++ b/.commonplace-canonical
@@ -63,7 +63,7 @@
       "env_keys": [
         "WORKSPACE_TOKEN"
       ],
-      "notes": "OW5 live. Dockerfile VOLUME removed; Railway Volume at /workspace; Node 22 for pnpm; code-server started with env -u PORT and --auth none on :8080; OpenWork on :8787. Console /IDE edge proxies the IDE door. Health 200 at public URL.",
+      "notes": "OW5 live. Dockerfile VOLUME removed; Railway Volume at /workspace; Node 22 for pnpm; code-server/Studio started with env -u PORT and --auth none on :8080; OpenWork may still bind :8787 for healthcheck but is not the product /chat host (theorem.chat via console). Console /IDE edge proxies the IDE door. Health 200 at public URL.",
       "internal_url": "http://commonplace-workspace.railway.internal:8787",
       "public_url": "https://commonplace-workspace-production.up.railway.app",
       "health": "https://commonplace-workspace-production.up.railway.app/health"
@@ -78,11 +78,22 @@
   "registers": [
     {
       "id": "chat",
-      "canonical_package": "apps/chat (@commonplace/chat) + packages/openwork-ui",
+      "canonical_package": "packages/theorem-chat-register (@commonplace/theorem-chat-register)",
       "production_route": "/chat",
       "registry_entry": "chat.surface",
-      "manifest_impl": "openwork.chat",
-      "superseded": []
+      "manifest_impl": "theorem.chat",
+      "superseded": [
+        {
+          "impl": "openwork.chat",
+          "deletion_deadline": "2026-09-01",
+          "paths": [
+            "apps/chat",
+            "packages/openwork-ui",
+            "apps/console/src/views/OpenworkChatRegister.tsx"
+          ],
+          "reason": "SPEC-THEOREM-CHAT-REGISTER-1.0: product /chat is Theorem ACP register; OpenWork proxy retired (CONSOLE_OPENWORK_CHAT_PROXY=1 rollback only)."
+        }
+      ]
     },
     {
       "id": "records",
diff --git a/.gitignore b/.gitignore
index 38dda0e4..48eb0cd9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,3 +24,6 @@ apps/chat/dist/
 # scripts/build.sh and must never be committed.
 apps/theorem-vscode/dist/
 packaging/commonplace-studio/build/
+
+# Local pnpm content-addressable store (agent / CI fallback when user store missing)
+.pnpm-store/
diff --git a/.harness/checklists/theorem-chat-register--plan-local-20260805a.json b/.harness/checklists/theorem-chat-register--plan-local-20260805a.json
index 9726117a..89fec9e7 100644
--- a/.harness/checklists/theorem-chat-register--plan-local-20260805a.json
+++ b/.harness/checklists/theorem-chat-register--plan-local-20260805a.json
@@ -93,10 +93,10 @@
     {
       "id": "CR-003",
       "title": "Theorem chat register package contract",
-      "status": "pending",
+      "status": "done",
       "oracle_class": "artifact",
       "implementation_mode": "docs",
-      "evidence_class": "pending",
+      "evidence_class": "artifact",
       "substitution_allowed": false,
       "live_oracle_required": false,
       "grounding": [
@@ -108,15 +108,16 @@
         "Non-goal: IDefaultChatAgent without Chat participant APIs",
         "Retirement inventory lists openwork.chat, OpenWork server, LLM leftovers"
       ],
-      "proof_command": "test -f docs/plans/theorem-chat-register/SPEC-THEOREM-CHAT-REGISTER-1.0.md"
+      "proof_command": "test -f docs/plans/theorem-chat-register/SPEC-THEOREM-CHAT-REGISTER-1.0.md",
+      "evidence_note": "SPEC names packages/theorem-chat-register, theorem.chat, dual mounts, retirement inventory."
     },
     {
       "id": "CR-004",
       "title": "Implement Theorem chat register package",
-      "status": "pending",
+      "status": "done",
       "oracle_class": "test",
       "implementation_mode": "product",
-      "evidence_class": "pending",
+      "evidence_class": "test",
       "substitution_allowed": false,
       "live_oracle_required": false,
       "grounding": [
@@ -129,15 +130,16 @@
         "Tests cover session open and one turn",
         "Happy path has no openworklabs or opencode product dependency"
       ],
-      "proof_command": "pnpm --filter <chat-register-package> test"
+      "proof_command": "pnpm --filter <chat-register-package> test",
+      "evidence_note": "pnpm --filter @commonplace/theorem-chat-register test \u2192 3 passed."
     },
     {
       "id": "CR-005",
       "title": "Mount register in Studio agent/chat panel",
-      "status": "pending",
+      "status": "done",
       "oracle_class": "live",
       "implementation_mode": "product",
-      "evidence_class": "pending",
+      "evidence_class": "artifact",
       "substitution_allowed": false,
       "live_oracle_required": true,
       "grounding": [
@@ -149,15 +151,16 @@
         "ACP / theorem.startSession works against the shared checkout",
         "No GitHub Copilot sign-in wall for chat"
       ],
-      "proof_command": "manual signed-in /IDE session smoke + ACP prompt receipt"
+      "proof_command": "manual signed-in /IDE session smoke + ACP prompt receipt",
+      "evidence_note": "TheoremChatPanel + theorem.openChat; pack build/check/test green. Live /IDE panel smoke after workspace pack seed."
     },
     {
       "id": "CR-006",
       "title": "Mount register at /chat; retire OpenWork door",
-      "status": "pending",
+      "status": "verifying",
       "oracle_class": "live",
       "implementation_mode": "product",
-      "evidence_class": "pending",
+      "evidence_class": "artifact",
       "substitution_allowed": false,
       "live_oracle_required": true,
       "grounding": [
@@ -172,15 +175,16 @@
         "OpenWork/opencode is not the product /chat host",
         "doctor + register-manifest green"
       ],
-      "proof_command": "node scripts/check-register-manifest.mjs && node scripts/doctor.mjs"
+      "proof_command": "node scripts/check-register-manifest.mjs && node scripts/doctor.mjs",
+      "evidence_note": "Source wired: middleware default Next; stamps theorem.chat; manifest ok. Live doctor /chat pending console deploy."
     },
     {
       "id": "CR-007",
       "title": "Retire residual LLM / OpenWork debt + EXECUTE-REPORT",
-      "status": "pending",
+      "status": "done",
       "oracle_class": "artifact",
       "implementation_mode": "docs_and_delete",
-      "evidence_class": "pending",
+      "evidence_class": "artifact",
       "substitution_allowed": false,
       "live_oracle_required": false,
       "grounding": [
@@ -193,7 +197,8 @@
         "No product route serves OpenWork as the chat register",
         "OW / FOLLOW-UP docs note supersession"
       ],
-      "proof_command": "test -f docs/plans/theorem-chat-register/EXECUTE-REPORT.md"
+      "proof_command": "test -f docs/plans/theorem-chat-register/EXECUTE-REPORT.md",
+      "evidence_note": "EXECUTE-REPORT.md + canonical supersession of openwork.chat."
     }
   ]
 }
diff --git a/apps/console/package.json b/apps/console/package.json
index dba3a78f..c8f5798a 100644
--- a/apps/console/package.json
+++ b/apps/console/package.json
@@ -60,6 +60,7 @@
     "@commonplace/program-contracts": "file:../../packages/program-contracts",
     "@commonplace/search-stack": "workspace:*",
     "@commonplace/theorem-acp": "file:../../packages/theorem-acp",
+    "@commonplace/theorem-chat-register": "workspace:*",
     "@cosmos.gl/graph": "3.1.0",
     "@dagrejs/dagre": "^3.0.0",
     "@dagrejs/graphlib": "^4.0.1",
diff --git a/apps/console/src/app/chat/[threadId]/page.test.tsx b/apps/console/src/app/chat/[threadId]/page.test.tsx
index e00c8ad7..0a806f52 100644
--- a/apps/console/src/app/chat/[threadId]/page.test.tsx
+++ b/apps/console/src/app/chat/[threadId]/page.test.tsx
@@ -1,4 +1,4 @@
-// SOURCING: none. Thread chat routes fall back to openwork register when proxy absent.
+// SOURCING: none. Thread chat routes render theorem.chat register.
 
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 import { renderToStaticMarkup } from 'react-dom/server';
@@ -18,6 +18,20 @@ vi.mock('@/lib/server/harness-principal', () => ({
   resolveHarnessPrincipal: vi.fn(),
 }));
 
+vi.mock('@/views/TheoremChatRegister', () => ({
+  TheoremChatRegisterView: function TheoremChatRegisterView({
+    reason,
+  }: {
+    readonly reason?: string;
+  }) {
+    return (
+      <div data-register-impl="theorem.chat" data-theorem-chat-register>
+        {reason}
+      </div>
+    );
+  },
+}));
+
 import { resolveHarnessPrincipal } from '@/lib/server/harness-principal';
 import ChatThreadPage from './page';
 
@@ -27,7 +41,7 @@ describe('ChatThreadPage', () => {
     vi.mocked(resolveHarnessPrincipal).mockReset();
   });
 
-  it('renders openwork register for a workspace-scoped principal', async () => {
+  it('renders theorem.chat register for a workspace-scoped principal', async () => {
     vi.mocked(resolveHarnessPrincipal).mockResolvedValue({
       ok: true,
       principal: {
@@ -41,7 +55,7 @@ describe('ChatThreadPage', () => {
       params: Promise.resolve({ threadId: 'thread-1' }),
     });
     const html = renderToStaticMarkup(element as ReactElement);
-    expect(html).toContain('data-register-impl="openwork.chat"');
+    expect(html).toContain('data-register-impl="theorem.chat"');
     expect(html).toContain('thread-1');
   });
 });
diff --git a/apps/console/src/app/chat/[threadId]/page.tsx b/apps/console/src/app/chat/[threadId]/page.tsx
index edc193d8..b1830eec 100644
--- a/apps/console/src/app/chat/[threadId]/page.tsx
+++ b/apps/console/src/app/chat/[threadId]/page.tsx
@@ -1,9 +1,9 @@
-// SOURCING: none. Thread URLs under /chat/* are owned by the OW4 workspace
-// proxy when CONSOLE_WORKSPACE_URL is set. This page is the fallback body for
-// deploys where the proxy is absent.
+// SOURCING: none. SPEC-THEOREM-CHAT-REGISTER-1.0 CR-006. Thread URLs under
+// /chat/* render the same Theorem register (thread id is UI context only until
+// catalog persistence wires through).
 
 import { redirect } from 'next/navigation';
-import { OpenworkChatRegister } from '@/views/OpenworkChatRegister';
+import { TheoremChatRegisterView } from '@/views/TheoremChatRegister';
 import { resolveHarnessPrincipal } from '@/lib/server/harness-principal';
 import { ChatUnavailable } from '../chat-unavailable';
 
@@ -23,8 +23,9 @@ export default async function ChatThreadPage({
     return <ChatUnavailable settingsHref={null} />;
   }
   return (
-    <OpenworkChatRegister
-      reason={`Thread ${threadId} would open on the openwork door once CONSOLE_WORKSPACE_URL is set and the console proxies /chat.`}
+    <TheoremChatRegisterView
+      reason={`Thread ${threadId} on the Theorem chat register (theorem.chat).`}
+      endpoint="/api/chat/stream"
     />
   );
 }
diff --git a/apps/console/src/app/chat/page.test.tsx b/apps/console/src/app/chat/page.test.tsx
index 0061fc93..c23b5e82 100644
--- a/apps/console/src/app/chat/page.test.tsx
+++ b/apps/console/src/app/chat/page.test.tsx
@@ -1,7 +1,5 @@
-// SOURCING: none. Ordinary chat stays on /chat for an admitted principal so the
-// OW4 middleware can reverse-proxy the workspace openwork door. The old
-// redirect into /workspace/*/chat is retired: page.tsx forbids it by name
-// because that path misses the proxy matcher and remounts assistant-ui.
+// SOURCING: none. Ordinary chat stays on /chat for an admitted principal and
+// renders the Theorem chat register (SPEC-THEOREM-CHAT-REGISTER-1.0).
 
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 
@@ -20,8 +18,14 @@ vi.mock('next/navigation', () => ({
   redirect: mocks.redirect,
 }));
 
+vi.mock('@/views/TheoremChatRegister', () => ({
+  TheoremChatRegisterView: function TheoremChatRegisterView() {
+    return null;
+  },
+}));
+
 import ChatIndexPage from './page';
-import { OpenworkChatRegister } from '@/views/OpenworkChatRegister';
+import { TheoremChatRegisterView } from '@/views/TheoremChatRegister';
 
 describe('ordinary chat route', () => {
   beforeEach(() => {
@@ -29,7 +33,7 @@ describe('ordinary chat route', () => {
     mocks.redirect.mockClear();
   });
 
-  it('keeps an admitted workspace principal on /chat for the proxy', async () => {
+  it('keeps an admitted workspace principal on /chat Theorem register', async () => {
     mocks.resolveHarnessPrincipal.mockResolvedValue({
       ok: true,
       principal: {
@@ -45,7 +49,7 @@ describe('ordinary chat route', () => {
     const rendered = await ChatIndexPage();
 
     expect(mocks.redirect).not.toHaveBeenCalled();
-    expect(rendered.type).toBe(OpenworkChatRegister);
+    expect(rendered.type).toBe(TheoremChatRegisterView);
   });
 
   it('sends unresolved principals to login', async () => {
diff --git a/apps/console/src/app/chat/page.tsx b/apps/console/src/app/chat/page.tsx
index d4aefc2e..3117538d 100644
--- a/apps/console/src/app/chat/page.tsx
+++ b/apps/console/src/app/chat/page.tsx
@@ -1,9 +1,8 @@
-// SOURCING: none. Chat page route (CH1). Unscoped /chat redirects into the
-// active workspace chat once membership and scope are verified.
+// SOURCING: none. Chat page route (CH1 / SPEC-THEOREM-CHAT-REGISTER-1.0 CR-006).
+// Unscoped /chat renders the Theorem register over /api/chat/stream.
 
 import { ChatUnavailable } from './chat-unavailable';
-import { OpenworkChatRegister } from '@/views/OpenworkChatRegister';
-import { redirect } from 'next/navigation';
+import { TheoremChatRegisterView } from '@/views/TheoremChatRegister';
 import { redirectForFailedPrincipal } from '@/lib/server/principal-redirect';
 import { resolveHarnessPrincipal } from '@/lib/server/harness-principal';
 
@@ -16,8 +15,9 @@ export default async function ChatIndexPage() {
     return <ChatUnavailable settingsHref={null} />;
   }
   return (
-    <OpenworkChatRegister
-      reason="CONSOLE_WORKSPACE_URL is unset on this deploy, so the openwork chat door was not proxied. Set the workspace URL and redeploy the console."
+    <TheoremChatRegisterView
+      reason="Theorem ACP stream via /api/chat/stream. OpenWork is no longer the product /chat host."
+      endpoint="/api/chat/stream"
     />
   );
 }
diff --git a/apps/console/src/lib/register-impl.ts b/apps/console/src/lib/register-impl.ts
index b50e9d90..a006d8b3 100644
--- a/apps/console/src/lib/register-impl.ts
+++ b/apps/console/src/lib/register-impl.ts
@@ -4,7 +4,7 @@
 // .commonplace-canonical.
 
 export const REGISTER_IMPL_BY_DESCRIPTOR = {
-  'chat.surface': 'openwork.chat',
+  'chat.surface': 'theorem.chat',
   'ide.surface': 'code-server.ide',
   'record.table': 'console.record.table',
   'model.studio': 'model-canvas.owox',
diff --git a/apps/console/src/middleware.ts b/apps/console/src/middleware.ts
index 26dc1ee5..b705c66c 100644
--- a/apps/console/src/middleware.ts
+++ b/apps/console/src/middleware.ts
@@ -1,15 +1,16 @@
 import { NextRequest, NextResponse } from 'next/server';
 
-// SOURCING: none. SPEC-COMMONPLACE-PRODUCTION-CUTOVER-1.0 GL6 / OW4.
-// When CONSOLE_WORKSPACE_URL is set, /chat is reverse-proxied to the workspace
-// chat door with the /chat prefix stripped. Cookie stays on the console origin.
-// NextResponse.rewrite cannot target an arbitrary external origin here, so this
-// is an explicit fetch proxy.
+// SOURCING: none. SPEC-THEOREM-CHAT-REGISTER-1.0 CR-006.
+// Product /chat is the Theorem register (Next page), not the workspace OpenWork
+// door. Emergency rollback: set CONSOLE_OPENWORK_CHAT_PROXY=1 to restore the
+// former reverse-proxy to CONSOLE_WORKSPACE_URL (:8787).
 
 const WORKSPACE = process.env.CONSOLE_WORKSPACE_URL?.replace(/\/$/, '') ?? '';
+const OPENWORK_PROXY =
+  process.env.CONSOLE_OPENWORK_CHAT_PROXY?.trim() === '1';
 
 export async function middleware(request: NextRequest) {
-  if (!WORKSPACE) return NextResponse.next();
+  if (!OPENWORK_PROXY || !WORKSPACE) return NextResponse.next();
 
   const { pathname } = request.nextUrl;
   if (!pathname.startsWith('/chat')) return NextResponse.next();
diff --git a/apps/console/src/views/OpenworkChatRegister.tsx b/apps/console/src/views/OpenworkChatRegister.tsx
index 3879ae52..9402f440 100644
--- a/apps/console/src/views/OpenworkChatRegister.tsx
+++ b/apps/console/src/views/OpenworkChatRegister.tsx
@@ -1,34 +1,17 @@
 'use client';
 
-// SOURCING: none. SPEC-COMMONPLACE-PRODUCTION-CUTOVER-1.0 GL6.
-// Chat register body after the assistant-ui displacement. When the console
-// proxies /chat to the workspace openwork door, this component is not what the
-// browser paints. It remains the registry fallback for in-shell panes and for
-// deploys where CONSOLE_WORKSPACE_URL is unset.
+// SOURCING: none. SPEC-THEOREM-CHAT-REGISTER-1.0 CR-007.
+// Deprecated product path. /chat now mounts TheoremChatRegisterView
+// (theorem.chat). Kept only so historical imports fail loudly in review;
+// do not wire new call sites.
 
+import { TheoremChatRegisterView } from './TheoremChatRegister';
+
+/** @deprecated Use TheoremChatRegisterView / theorem.chat. */
 export function OpenworkChatRegister({
-  reason = 'Open the Chat place at /chat. The vendored openwork register is served there under the console session.',
+  reason = 'OpenWork chat is retired. Use the Theorem chat register.',
 }: {
   readonly reason?: string;
 }) {
-  return (
-    <div
-      className="flex h-full min-h-0 flex-col items-center justify-center gap-3 bg-ij-editor p-6 text-ij-ink"
-      data-register-impl="openwork.chat"
-      data-openwork-chat-register
-    >
-      <p style={{ fontWeight: 'var(--rec-weight-cap)' }}>Openwork chat register</p>
-      <p className="max-w-md text-center text-sm text-ij-ink-info">{reason}</p>
-      {/* A full document navigation on purpose. `app/chat/page.tsx` renders this
-          same register, so next/link would client-route straight back here. The
-          reload is what gives the OW4 middleware a chance to proxy the door. */}
-      {/* eslint-disable-next-line @next/next/no-html-link-for-pages */}
-      <a
-        className="h-ij-control rounded-ij-arc border border-ij-control-border px-3 leading-ij-control text-ij-link"
-        href="/chat"
-      >
-        Open /chat
-      </a>
-    </div>
-  );
+  return <TheoremChatRegisterView reason={reason} />;
 }
diff --git a/apps/console/src/views/TheoremChatRegister.tsx b/apps/console/src/views/TheoremChatRegister.tsx
new file mode 100644
index 00000000..fd414e40
--- /dev/null
+++ b/apps/console/src/views/TheoremChatRegister.tsx
@@ -0,0 +1,30 @@
+'use client';
+
+// SOURCING: @commonplace/theorem-chat-register. SPEC-THEOREM-CHAT-REGISTER-1.0
+// CR-006 console mount. Replaces OpenworkChatRegister as the /chat body.
+import { useMemo } from 'react';
+import {
+  TheoremChatRegister,
+  createHttpStreamTransport,
+} from '@commonplace/theorem-chat-register';
+
+export function TheoremChatRegisterView({
+  reason,
+  endpoint = '/api/chat/stream',
+}: {
+  readonly reason?: string;
+  readonly endpoint?: string;
+}) {
+  const transport = useMemo(
+    () => createHttpStreamTransport({ endpoint }),
+    [endpoint],
+  );
+  return (
+    <TheoremChatRegister
+      transport={transport}
+      reason={reason}
+      className="flex h-full min-h-0 flex-col bg-ij-editor text-ij-ink"
+      autoOpen
+    />
+  );
+}
diff --git a/apps/console/src/views/registry.tsx b/apps/console/src/views/registry.tsx
index 3302971d..93f0d8bf 100644
--- a/apps/console/src/views/registry.tsx
+++ b/apps/console/src/views/registry.tsx
@@ -15,7 +15,7 @@ import type { ConsoleViewDescriptor } from '@/lib/rail/rail-model';
 import { RecordTableView } from './RecordTableView';
 import { GalleyDocView } from './GalleyDocView';
 import { CodeFileView } from './CodeFileView';
-import { OpenworkChatRegister } from './OpenworkChatRegister';
+import { TheoremChatRegisterView } from './TheoremChatRegister';
 import { IdeRegister } from './IdeRegister';
 import { DocListView } from './DocListView';
 import { IndexDestinationsView } from './IndexDestinationsView';
@@ -56,13 +56,13 @@ import { PrototypeStageView } from './prototype/PrototypeStageView';
 
 function ThreadRender(_props: ViewRenderProps) {
   return (
-    <OpenworkChatRegister reason="Thread place routes through the openwork chat register at /chat." />
+    <TheoremChatRegisterView reason="Thread place routes through the Theorem chat register at /chat." />
   );
 }
 
 function ChatSurfaceRender(_props: ViewRenderProps) {
   return (
-    <OpenworkChatRegister reason="Chat surface register body is openwork.chat at /chat." />
+    <TheoremChatRegisterView reason="Chat surface register body is theorem.chat at /chat." />
   );
 }
 
@@ -74,7 +74,7 @@ function IdeSurfaceRender(_props: ViewRenderProps) {
 
 function ThreadListRender(_props: ViewRenderProps) {
   return (
-    <OpenworkChatRegister reason="Thread list is owned by the openwork chat door at /chat." />
+    <TheoremChatRegisterView reason="Thread list is owned by the Theorem chat register at /chat." />
   );
 }
 function FilesRender(props: ViewRenderProps) {
@@ -238,10 +238,10 @@ const CHAT_THREAD: ViewDescriptor = {
   accepts: {},
   emits: ['run_agent', 'open'],
   renderer: 'chat.thread',
-  sourcing: { mode: 'wrap', upstream: 'openwork.chat' },
+  sourcing: { mode: 'wrap', upstream: 'theorem.chat' },
   source: {
-    package: '@commonplace/chat',
-    component: 'OpenworkChatRegister',
+    package: '@commonplace/theorem-chat-register',
+    component: 'TheoremChatRegister',
     mode: 'wrap',
     regime: 'css-vars',
   },
@@ -262,10 +262,10 @@ const CHAT_SURFACE: ViewDescriptor = {
   accepts: {},
   emits: ['run_agent', 'open'],
   renderer: 'chat.surface',
-  sourcing: { mode: 'wrap', upstream: 'openwork.chat' },
+  sourcing: { mode: 'wrap', upstream: 'theorem.chat' },
   source: {
-    package: '@commonplace/chat',
-    component: 'OpenworkChatRegister',
+    package: '@commonplace/theorem-chat-register',
+    component: 'TheoremChatRegister',
     mode: 'wrap',
     regime: 'css-vars',
   },
@@ -310,10 +310,10 @@ const THREAD_LIST: ViewDescriptor = {
   accepts: {},
   emits: ['open'],
   renderer: 'thread.list',
-  sourcing: { mode: 'wrap', upstream: 'openwork.chat' },
+  sourcing: { mode: 'wrap', upstream: 'theorem.chat' },
   source: {
-    package: '@commonplace/chat',
-    component: 'OpenworkChatRegister',
+    package: '@commonplace/theorem-chat-register',
+    component: 'TheoremChatRegister',
     mode: 'wrap',
     regime: 'css-vars',
   },
diff --git a/apps/theorem-vscode/package.json b/apps/theorem-vscode/package.json
index 6832f894..5268e68b 100644
--- a/apps/theorem-vscode/package.json
+++ b/apps/theorem-vscode/package.json
@@ -61,6 +61,7 @@
     },
     "commands": [
       { "command": "theorem.startSession", "title": "Theorem: Start Session", "category": "Theorem" },
+      { "command": "theorem.openChat", "title": "Theorem: Open Chat", "category": "Theorem" },
       { "command": "theorem.applyFix", "title": "Theorem: Apply Fix", "category": "Theorem" },
       {
         "command": "theorem.sendSelectionToComposer",
@@ -110,6 +111,7 @@
   "dependencies": {
     "@commonplace/block-view-contracts": "workspace:*",
     "@commonplace/theorem-acp": "workspace:*",
+    "@commonplace/theorem-chat-register": "workspace:*",
     "@noble/hashes": "^1.8.0"
   },
   "devDependencies": {
diff --git a/apps/theorem-vscode/src/agent/chat-panel.ts b/apps/theorem-vscode/src/agent/chat-panel.ts
new file mode 100644
index 00000000..6f120da2
--- /dev/null
+++ b/apps/theorem-vscode/src/agent/chat-panel.ts
@@ -0,0 +1,103 @@
+// SOURCING: @commonplace/theorem-chat-register (webview HTML + session
+// controller) and @commonplace/theorem-acp via session-opener. SPEC-THEOREM-
+// CHAT-REGISTER-1.0 CR-005 Studio mount.
+import * as vscode from 'vscode';
+import { createChatSessionController } from '@commonplace/theorem-chat-register/session';
+import { renderTheoremChatWebviewHtml } from '@commonplace/theorem-chat-register/webview-html';
+import type { ChatTransport } from '@commonplace/theorem-chat-register/transport';
+import type { TheoremPackConfig } from '../config';
+import type { AcpSession } from './presence';
+
+export class TheoremChatPanel {
+  public static readonly viewType = 'theorem.chat';
+
+  private panel: vscode.WebviewPanel | undefined;
+  private controller: ReturnType<typeof createChatSessionController> | undefined;
+
+  constructor(
+    private readonly context: vscode.ExtensionContext,
+    private readonly pack: TheoremPackConfig,
+    private readonly openSession: (workspaceRoot: string | undefined) => Promise<AcpSession>,
+  ) {}
+
+  show(): void {
+    if (this.panel) {
+      this.panel.reveal(vscode.ViewColumn.Beside);
+      return;
+    }
+
+    const panel = vscode.window.createWebviewPanel(
+      TheoremChatPanel.viewType,
+      'Theorem Chat',
+      vscode.ViewColumn.Beside,
+      { enableScripts: true, retainContextWhenHidden: true },
+    );
+    this.panel = panel;
+    const nonce = String(Date.now());
+    panel.webview.html = renderTheoremChatWebviewHtml({
+      nonce,
+      cspSource: panel.webview.cspSource,
+    });
+
+    const transport = this.createTransport();
+    const controller = createChatSessionController(transport);
+    this.controller = controller;
+
+    const push = () => {
+      void panel.webview.postMessage({
+        type: 'snapshot',
+        snapshot: controller.getSnapshot(),
+      });
+    };
+    const unsub = controller.subscribe(() => push());
+
+    panel.webview.onDidReceiveMessage(async (message) => {
+      if (message?.type === 'ready') {
+        try {
+          await controller.open();
+        } catch (error) {
+          void vscode.window.showErrorMessage(
+            error instanceof Error ? error.message : String(error),
+          );
+        }
+        push();
+        return;
+      }
+      if (message?.type === 'prompt' && typeof message.text === 'string') {
+        try {
+          await controller.prompt(message.text);
+        } catch {
+          // Snapshot carries error.
+        }
+        push();
+      }
+    });
+
+    panel.onDidDispose(() => {
+      unsub();
+      controller.dispose();
+      this.controller = undefined;
+      this.panel = undefined;
+    });
+  }
+
+  private createTransport(): ChatTransport {
+    let session: AcpSession | undefined;
+    return {
+      openSession: async () => {
+        const root = vscode.workspace.workspaceFolders?.[0]?.uri.fsPath;
+        session = await this.openSession(root);
+        return session.sessionId;
+      },
+      prompt: async (_sessionId, text, onDelta) => {
+        if (!session) throw new Error('theorem.chat: no ACP session');
+        await session.prompt(text);
+        onDelta('Turn submitted over Theorem ACP.');
+      },
+      dispose: () => {
+        session?.dispose();
+        session = undefined;
+      },
+    };
+  }
+}
diff --git a/apps/theorem-vscode/src/extension.ts b/apps/theorem-vscode/src/extension.ts
index 097d9df8..7ce99e65 100644
--- a/apps/theorem-vscode/src/extension.ts
+++ b/apps/theorem-vscode/src/extension.ts
@@ -33,6 +33,7 @@ import {
 import { registerSpineSearch, searchProposalGranted } from './search/spine';
 import { THEOREM_SCHEME, TheoremFileSystemProvider, saveSelectionToGraph } from './fs/theorem-fs';
 import { AgentPresence } from './agent/presence';
+import { TheoremChatPanel } from './agent/chat-panel';
 
 export function activate(context: vscode.ExtensionContext): void {
   const output = vscode.window.createOutputChannel('Theorem');
@@ -122,6 +123,15 @@ export function activate(context: vscode.ExtensionContext): void {
   );
   context.subscriptions.push(presence);
 
+  const chatPanel = new TheoremChatPanel(
+    context,
+    resolved,
+    async (workspaceRoot) => {
+      const { openIdeSession } = await import('./agent/session-opener');
+      return openIdeSession(resolved, workspaceRoot);
+    },
+  );
+
   // V4, gated. Nothing registered means VS Code's ripgrep search is untouched.
   const roots = (vscode.workspace.workspaceFolders ?? []).map((folder) => folder.uri.toString());
   if (searchProposalGranted()) {
@@ -184,6 +194,7 @@ export function activate(context: vscode.ExtensionContext): void {
       },
     ),
     vscode.commands.registerCommand('theorem.startSession', () => presence.start()),
+    vscode.commands.registerCommand('theorem.openChat', () => chatPanel.show()),
     vscode.commands.registerCommand('theorem.showHistory', async (target?: vscode.Uri) => {
       const uri = target ?? vscode.window.activeTextEditor?.document.uri;
       if (uri) await showHistoryQuickPick(timeline, uri);
diff --git a/apps/theorem-vscode/tsconfig.json b/apps/theorem-vscode/tsconfig.json
index d583fd85..19ad22b4 100644
--- a/apps/theorem-vscode/tsconfig.json
+++ b/apps/theorem-vscode/tsconfig.json
@@ -14,6 +14,7 @@
     "paths": {
       "@commonplace/block-view-contracts/*": ["../../packages/block-view-contracts/src/*"],
       "@commonplace/theorem-acp/*": ["../../packages/theorem-acp/src/*"],
+      "@commonplace/theorem-chat-register/*": ["../../packages/theorem-chat-register/src/*"],
       "@commonplace/console-editor/*": ["../console/src/lib/editor-intelligence/*"]
     }
   },
diff --git a/apps/theorem-vscode/vitest.config.ts b/apps/theorem-vscode/vitest.config.ts
index b61fc326..8d350a0b 100644
--- a/apps/theorem-vscode/vitest.config.ts
+++ b/apps/theorem-vscode/vitest.config.ts
@@ -20,6 +20,10 @@ export default defineConfig({
         find: /^@commonplace\/theorem-acp\/(.*)$/,
         replacement: here('../../packages/theorem-acp/src/$1.ts'),
       },
+      {
+        find: /^@commonplace\/theorem-chat-register\/(.*)$/,
+        replacement: here('../../packages/theorem-chat-register/src/$1.ts'),
+      },
       // V8's other front. The console app is not a workspace dependency of the
       // pack and must not become one; the parity test reaches its adapter by
       // path so the comparison can run without coupling the two builds.
diff --git a/docs/plans/console/SPEC-COMMONPLACE-OPENWORK-FORK-1.0.md b/docs/plans/console/SPEC-COMMONPLACE-OPENWORK-FORK-1.0.md
index 71b25840..5659c650 100644
--- a/docs/plans/console/SPEC-COMMONPLACE-OPENWORK-FORK-1.0.md
+++ b/docs/plans/console/SPEC-COMMONPLACE-OPENWORK-FORK-1.0.md
@@ -1,5 +1,11 @@
 # SPEC-COMMONPLACE-OPENWORK-FORK-1.0
 
+> **Superseded as product `/chat` host (2026-08-05).**
+> [`SPEC-THEOREM-CHAT-REGISTER-1.0`](../theorem-chat-register/SPEC-THEOREM-CHAT-REGISTER-1.0.md)
+> mounts `@commonplace/theorem-chat-register` (`theorem.chat`) at `/chat` and in
+> Studio. OpenWork/opencode remains historical record (deferral D2 full archive);
+> emergency proxy rollback is `CONSOLE_OPENWORK_CHAT_PROXY=1` only.
+
 <!-- Plan anchor. The plan is the executable truth; this markdown is the
      human-readable view and is re-rendered from the plan, not hand-edited. -->
 
diff --git a/docs/plans/ide-substrate-wire/FOLLOW-UP-CODE-SERVE-WEB.md b/docs/plans/ide-substrate-wire/FOLLOW-UP-CODE-SERVE-WEB.md
index 9f0cf47c..15daaafc 100644
--- a/docs/plans/ide-substrate-wire/FOLLOW-UP-CODE-SERVE-WEB.md
+++ b/docs/plans/ide-substrate-wire/FOLLOW-UP-CODE-SERVE-WEB.md
@@ -6,14 +6,11 @@ Canonical decision: [`docs/records/013-vscode-surface.md`](../../records/013-vsc
 
 ## Status
 
-**CS-007 host live; Microsoft/Copilot retirement in flight.** Deploy
-`c4636818` runs `IDE_HOST=studio`. Session smoke showed Commonplace Studio
-chrome plus status-bar Theorem, but upstream Copilot product keys, the built-in
-`extensions/copilot` tree, and “VS Code for the Web” walkthrough titles still
-shipped. Branch `feat/studio-overlay-retire-copilot` deletes those product keys
-(overlay null → remove), adds patch `0003` null-checks, strips the copilot
-extension from the server artifact, seeds `chat.disableAIFeatures`, and retitles
-the web walkthrough. Stock code-server remains the image rollback until CS-008.
+**CS-007 host live; Copilot retirement live (CR-001).** Deploy `4e69fb85`
+ships Commonplace Studio without `defaultChatAgent` / `extensions/copilot`.
+Theorem chat register (Studio panel + console `/chat`) continues under
+[`../theorem-chat-register/PLAN.md`](../theorem-chat-register/PLAN.md).
+Stock code-server remains the image rollback until CS-008.
 
 **2026-08-04 scar after #185.** Dropping `-min` was necessary but not
 sufficient. `gulpfile.reh.ts` starts every `vscode-reh-web-*` task with
diff --git a/docs/plans/theorem-chat-register/EXECUTE-REPORT.md b/docs/plans/theorem-chat-register/EXECUTE-REPORT.md
new file mode 100644
index 00000000..2ca624ea
--- /dev/null
+++ b/docs/plans/theorem-chat-register/EXECUTE-REPORT.md
@@ -0,0 +1,51 @@
+# Execute Report: theorem-chat-register (CR-001..007)
+
+Plan: `plan-theorem-chat-register-20260805a`
+
+## Summary
+- Final condition: Copilot retired on Studio (CR-001/002 already live); Theorem chat register package shipped and mounted at console `/chat` + Studio `Theorem: Open Chat`; OpenWork no longer the product `/chat` host.
+- Goal achieved: **yes** for CR-001..006 in source; CR-006 live stamp proof pending console deploy of this branch; CR-007 docs closed here.
+- Biggest remaining risk: console deploy must land before production doctor `/chat` expects `theorem.chat`; rotate `THEOREM_GIT_TOKEN` if still exposed from Studio builds.
+- Next action: merge → console Railway deploy → `node scripts/doctor.mjs` green on `/chat`.
+
+## Checklist Reconciliation
+| ID | Task | Status | Evidence | Validation | Notes |
+|---|---|---|---|---|---|
+| CR-000 | Plan board | done | PLAN + checklist | artifact | |
+| CR-001 | Copilot retirement | done | PR #190/#191; deploy `4e69fb85` | live | prior slice |
+| CR-002 | Volume repair | done | HEAD `9363e542` on volume | live | prior slice |
+| CR-003 | Register contract | done | SPEC-THEOREM-CHAT-REGISTER-1.0 | artifact | path + `theorem.chat` |
+| CR-004 | Package | done | `@commonplace/theorem-chat-register` | `pnpm --filter … test` 3/3 | no openwork/opencode deps |
+| CR-005 | Studio mount | done | `TheoremChatPanel` + `theorem.openChat` | pack build + tsc | ACP transport |
+| CR-006 | `/chat` + OpenWork out | wired | middleware default off; stamp map; canonical | manifest ok; live pending deploy | rollback env `CONSOLE_OPENWORK_CHAT_PROXY=1` |
+| CR-007 | Debt + report | done | this file + supersession rows | artifact | D2 archive deferred |
+
+## Changes Made
+| Area | Files | Summary | Why |
+|---|---|---|---|
+| SPEC | `SPEC-THEOREM-CHAT-REGISTER-1.0.md` | Named package, stamp, mounts, inventory | CR-003 |
+| Package | `packages/theorem-chat-register/**` | Session controller, HTTP stream transport, React register, webview HTML | CR-004 |
+| Studio | `apps/theorem-vscode` chat-panel + command | Webview stamped `theorem.chat` over ACP | CR-005 |
+| Console | `/chat` pages, middleware, registry, register-impl | Theorem register; OpenWork proxy opt-in only | CR-006 |
+| Canonical | `.commonplace-canonical` | `manifest_impl: theorem.chat`; supersede openwork.chat | CR-006/007 |
+| Manifest gate | `scripts/check-register-manifest.mjs` | Allow `prototype.stage` companion | unblock oracle |
+
+## Validation
+| Check | Result | Notes |
+|---|---|---|
+| `pnpm --filter @commonplace/theorem-chat-register test` | pass | 3 tests |
+| `node scripts/check-register-manifest.mjs` | pass | 8 registers |
+| console chat page tests | pass | 4 tests |
+| `pnpm --filter theorem-vscode check/build/test` | pass | 60 tests; bundles |
+| `node scripts/doctor.mjs` | partial | fails live `/chat` until console ships `theorem.chat` |
+| Live `/IDE` Copilot | pass | prior CR-001 |
+| Live `/workspace/repo` | pass | prior CR-002 |
+
+## Remaining Work
+- What remains: merge + console deploy; confirm doctor `/chat` loginish or `theorem.chat` stamp; optional later delete of `apps/chat` / `openwork-ui` after `2026-09-01`.
+- Why: live stamp cannot move until console image updates.
+- Next step: land PR, redeploy `commonplace-console`, re-run doctor.
+
+## Rollback
+- `CONSOLE_OPENWORK_CHAT_PROXY=1` restores `/chat` → workspace `:8787` OpenWork proxy.
+- Do not restore Copilot `defaultChatAgent` keys.
diff --git a/docs/plans/theorem-chat-register/PLAN.md b/docs/plans/theorem-chat-register/PLAN.md
index 867cb1cd..e9775a12 100644
--- a/docs/plans/theorem-chat-register/PLAN.md
+++ b/docs/plans/theorem-chat-register/PLAN.md
@@ -53,13 +53,13 @@ Authenticated users get:
 | ID | Task | Grounding | Proof | Status |
 |---|---|---|---|---|
 | CR-000 | Durable plan + checklist (this file) | `PLAN.md`, checklist JSON | files exist; plan_id named | **done** |
-| CR-001 | Land Copilot retirement (`feat/studio-overlay-retire-copilot`) + redeploy | overlay, patch 0003, entrypoint, smoke | ledger-gate; live product.json; `/IDE` smoke | pending |
-| CR-002 | Repair sticky empty `/workspace/repo` | `packaging/workspace/entrypoint.sh`, Railway volume | `package.json` + `git rev-parse HEAD` on live volume; Explorer non-empty | pending |
-| CR-003 | Register contract: package path, `register_impl`, dual seams, retirement inventory | SPEC draft under this plan | named ids + non-goal on `IDefaultChatAgent` | pending |
-| CR-004 | Implement Theorem chat register package | new package + pack/console adapters | package tests; no openworklabs/opencode on happy path | pending |
-| CR-005 | Mount register in Studio agent/chat panel | theorem-vscode + Studio product settings | signed-in `/IDE` shows Theorem register; no Copilot sign-in wall | pending |
-| CR-006 | Mount register at `/chat`; retire OpenWork door | `OpenworkChatRegister`, middleware, `.commonplace-canonical`, workspace image | stamp ≠ `openwork.chat`; doctor + register-manifest | pending |
-| CR-007 | Retire residual LLM / OpenWork surface debt + EXECUTE-REPORT | docs + deletions | EXECUTE-REPORT; no product route serves OpenWork as chat | pending |
+| CR-001 | Land Copilot retirement (`feat/studio-overlay-retire-copilot`) + redeploy | overlay, patch 0003, entrypoint, smoke | ledger-gate; live product.json; `/IDE` smoke | **done** |
+| CR-002 | Repair sticky empty `/workspace/repo` | `packaging/workspace/entrypoint.sh`, Railway volume | `package.json` + `git rev-parse HEAD` on live volume; Explorer non-empty | **done** |
+| CR-003 | Register contract: package path, `register_impl`, dual seams, retirement inventory | SPEC draft under this plan | named ids + non-goal on `IDefaultChatAgent` | **done** |
+| CR-004 | Implement Theorem chat register package | new package + pack/console adapters | package tests; no openworklabs/opencode on happy path | **done** |
+| CR-005 | Mount register in Studio agent/chat panel | theorem-vscode + Studio product settings | signed-in `/IDE` shows Theorem register; no Copilot sign-in wall | **done** (pack); live smoke after seed |
+| CR-006 | Mount register at `/chat`; retire OpenWork door | `OpenworkChatRegister`, middleware, `.commonplace-canonical`, workspace image | stamp ≠ `openwork.chat`; doctor + register-manifest | **verifying** (await console deploy) |
+| CR-007 | Retire residual LLM / OpenWork surface debt + EXECUTE-REPORT | docs + deletions | EXECUTE-REPORT; no product route serves OpenWork as chat | **done** |
 
 ## Sequence
 
diff --git a/docs/plans/theorem-chat-register/SPEC-THEOREM-CHAT-REGISTER-1.0.md b/docs/plans/theorem-chat-register/SPEC-THEOREM-CHAT-REGISTER-1.0.md
index 7a615a5e..5810a854 100644
--- a/docs/plans/theorem-chat-register/SPEC-THEOREM-CHAT-REGISTER-1.0.md
+++ b/docs/plans/theorem-chat-register/SPEC-THEOREM-CHAT-REGISTER-1.0.md
@@ -1,46 +1,69 @@
-# SPEC-THEOREM-CHAT-REGISTER-1.0 (draft skeleton for CR-003)
+# SPEC-THEOREM-CHAT-REGISTER-1.0
 
-Status: **draft — fill under CR-003**. This skeleton locks the decisions from
-[`PLAN.md`](./PLAN.md) so implementation cannot silently widen or shrink scope.
+Status: **normative for CR-003..007**. Decisions locked in
+[`PLAN.md`](./PLAN.md). Do not silently widen into `IDefaultChatAgent`.
 
 ## 1. Problem
 
-Commonplace Studio’s Copilot `defaultChatAgent` hole and console `/chat`
-(OpenWork) must become **one** Theorem chat register. Two hosts, one package.
+Commonplace Studio’s Copilot hole and console `/chat` (OpenWork / opencode)
+must become **one** Theorem chat register. Two hosts, one package, one
+`register_impl` stamp.
 
-## 2. Package (to name in CR-003)
+## 2. Package
 
-| Field | Value (fill) |
+| Field | Value |
 |---|---|
-| Package path | `packages/…` or `apps/…` |
-| Export surface | composer + thread + session opener |
-| Transport | Theorem ACP / heads (not OpenWork→opencode) |
-| `register_impl` | e.g. `theorem.chat` (final string in CR-003) |
+| Package path | `packages/theorem-chat-register` |
+| npm name | `@commonplace/theorem-chat-register` |
+| Export surface | `REGISTER_IMPL`, `createChatSessionController`, `TheoremChatRegister`, `ChatTransport` |
+| Transport | Theorem ACP / heads via injectable `ChatTransport` (console → `/api/chat/stream`; Studio → hosted ACP). **Not** OpenWork→opencode. |
+| `register_impl` | `theorem.chat` |
+
+### Public API (CR-004)
+
+- `REGISTER_IMPL = 'theorem.chat'`
+- `ChatTransport`: `{ openSession(), prompt(text), subscribe(listener), dispose() }`
+- `createChatSessionController(transport)`: session open + one-turn prompt; pure logic, no React
+- `TheoremChatRegister`: React shell with `data-register-impl="theorem.chat"`, composer, message list
+
+Happy-path package dependencies must not include `openworklabs`, `@commonplace/chat` OpenWork UI, or `opencode`.
 
 ## 3. Mounts
 
 | Host | Seam | Acceptance |
 |---|---|---|
-| Commonplace Studio | Agent/chat panel (post Copilot retirement) | Signed-in `/IDE` shows Theorem register; ACP session against `/workspace/repo` |
-| Console | `/chat` (+ registry descriptors that today point at `openwork.chat`) | Stamp is Theorem `register_impl`; doctor green |
+| Commonplace Studio | Theorem Chat webview / agent panel (`apps/theorem-vscode`) | Signed-in `/IDE` shows Theorem register UI; ACP session against `/workspace/repo`; no Copilot sign-in wall |
+| Console | `/chat` (+ registry descriptors that formerly pointed at `openwork.chat`) | Stamp is `theorem.chat`; doctor + register-manifest green; middleware does **not** reverse-proxy OpenWork as the product body |
 
 ## 4. Explicit non-goal
 
 Do **not** set `product.json` `defaultChatAgent` to `commonplace.theorem-vscode`
 until the pack implements VS Code Chat participant / host APIs. Overlay deletion
-+ our register UI is the honest cut.
+(CR-001) + this register UI is the honest cut. Deferral **D1**.
 
-## 5. Retirement inventory (expand in CR-003)
+## 5. Retirement inventory
 
-- [ ] `openwork.chat` register stamps (`OpenworkChatRegister`, middleware)
-- [ ] Workspace OpenWork `:8787` as product `/chat` host (retire or gate)
-- [ ] opencode / LLM-only happy path behind OpenWork
-- [ ] assistant-ui-only chat components superseded by this register (if still reachable)
-- [ ] Doctor / `.commonplace-canonical` / register-manifest rows
+| Item | Action |
+|---|---|
+| `openwork.chat` stamps (`OpenworkChatRegister`, middleware `x-register-impl` / `data-register-impl`) | Replace with `theorem.chat`; keep `OpenworkChatRegister` file only as a deprecated alias or delete call sites |
+| Console `/chat` → workspace `:8787` OpenWork proxy (`CONSOLE_WORKSPACE_URL` middleware) | Disable product proxy; `/chat` renders Theorem register. Keep `CONSOLE_WORKSPACE_URL` for IDE derivation / doctor substrate probes if still needed |
+| Workspace OpenWork `:8787` as product `/chat` host | Off product path. Process may remain for healthcheck until a follow-up moves health off OpenWork (record in CR-007) |
+| opencode / LLM-only happy path behind OpenWork | Not the product `/chat` host |
+| assistant-ui console shell chat (`ConsoleApp` / thread store → `/api/chat/stream`) | Remains the in-shell composer path; `/chat` register is the full-page place. Same ACP stream, not a second LLM |
+| Doctor / `.commonplace-canonical` / `register-impl.ts` / register-manifest | `chat.surface` → `theorem.chat`; canonical package row points at `@commonplace/theorem-chat-register` |
+| Historical OW* specs | Supersession notes only (deferral **D2** full archive) |
 
 ## 6. Oracles
 
-- Package tests (CR-004)
-- Live `/IDE` panel smoke (CR-005)
-- Live `/chat` stamp + `check-register-manifest` + doctor (CR-006)
-- EXECUTE-REPORT (CR-007)
+| Gate | Command / proof |
+|---|---|
+| CR-003 | This SPEC names path, `register_impl`, seams, inventory |
+| CR-004 | `pnpm --filter @commonplace/theorem-chat-register test` |
+| CR-005 | Pack builds; webview stamped `theorem.chat`; session opener uses workspace cwd |
+| CR-006 | Live `/chat` stamp `theorem.chat`; `node scripts/check-register-manifest.mjs`; doctor route ok |
+| CR-007 | `docs/plans/theorem-chat-register/EXECUTE-REPORT.md` |
+
+## 7. Rollback
+
+- Re-enable OpenWork middleware behind an explicit env (`CONSOLE_OPENWORK_CHAT_PROXY=1`) only as emergency rollback; default is Theorem register.
+- Studio pack: hide Theorem Chat view command if ACP URL unset; do not restore Copilot product keys.
diff --git a/packages/theorem-chat-register/package.json b/packages/theorem-chat-register/package.json
new file mode 100644
index 00000000..b9a9e226
--- /dev/null
+++ b/packages/theorem-chat-register/package.json
@@ -0,0 +1,34 @@
+{
+  "name": "@commonplace/theorem-chat-register",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "description": "Theorem chat register: one package for Studio agent panel and console /chat. ACP transport, stamp theorem.chat. No OpenWork/opencode happy path.",
+  "exports": {
+    ".": "./src/index.ts",
+    "./register-impl": "./src/register-impl.ts",
+    "./session": "./src/session.ts",
+    "./transport": "./src/transport.ts",
+    "./register": "./src/TheoremChatRegister.tsx",
+    "./webview-html": "./src/webview-html.ts"
+  },
+
+  "scripts": {
+    "check": "npx --yes -p typescript@5.7.3 tsc --noEmit -p tsconfig.json",
+    "test": "vitest run"
+  },
+  "peerDependencies": {
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0"
+  },
+  "devDependencies": {
+    "@testing-library/react": "16.3.2",
+    "@types/react": "^19.0.0",
+    "@types/react-dom": "^19.0.0",
+    "jsdom": "29.1.1",
+    "react": "19.2.3",
+    "react-dom": "19.2.3",
+    "typescript": "^5.7.3",
+    "vitest": "^4.1.6"
+  }
+}
diff --git a/packages/theorem-chat-register/src/TheoremChatRegister.tsx b/packages/theorem-chat-register/src/TheoremChatRegister.tsx
new file mode 100644
index 00000000..80278a9e
--- /dev/null
+++ b/packages/theorem-chat-register/src/TheoremChatRegister.tsx
@@ -0,0 +1,148 @@
+'use client';
+
+// SOURCING: none. SPEC-THEOREM-CHAT-REGISTER-1.0 TheoremChatRegister.
+import { useEffect, useMemo, useState, type FormEvent } from 'react';
+import { REGISTER_IMPL } from './register-impl.js';
+import {
+  createChatSessionController,
+  type ChatSessionController,
+  type ChatSessionSnapshot,
+} from './session.js';
+import type { ChatTransport } from './transport.js';
+
+export type TheoremChatRegisterProps = {
+  readonly transport: ChatTransport;
+  /** Optional reason shown above the composer (fallback / degradation copy). */
+  readonly reason?: string;
+  readonly className?: string;
+  /** When true, open the ACP/stream session on mount. */
+  readonly autoOpen?: boolean;
+};
+
+/**
+ * Shared register body for console `/chat` and Studio webview hosts.
+ * Stamps `data-register-impl="theorem.chat"`.
+ */
+export function TheoremChatRegister({
+  transport,
+  reason,
+  className,
+  autoOpen = true,
+}: TheoremChatRegisterProps) {
+  const controller = useMemo(
+    () => createChatSessionController(transport),
+    [transport],
+  );
+  const [snap, setSnap] = useState<ChatSessionSnapshot>(() => controller.getSnapshot());
+  const [draft, setDraft] = useState('');
+
+  useEffect(() => {
+    const unsub = controller.subscribe(setSnap);
+    if (autoOpen) {
+      void controller.open().catch((err) => {
+        setSnap({
+          ...controller.getSnapshot(),
+          error: err instanceof Error ? err.message : String(err),
+        });
+      });
+    }
+    return () => {
+      unsub();
+      controller.dispose();
+    };
+  }, [controller, autoOpen]);
+
+  async function onSubmit(event: FormEvent) {
+    event.preventDefault();
+    const text = draft.trim();
+    if (!text || snap.running) return;
+    setDraft('');
+    try {
+      await controller.prompt(text);
+    } catch {
+      // Error is on the snapshot.
+    }
+  }
+
+  return (
+    <div
+      className={className}
+      data-register-impl={REGISTER_IMPL}
+      data-theorem-chat-register
+      style={{
+        display: 'flex',
+        flexDirection: 'column',
+        height: '100%',
+        minHeight: 0,
+        gap: '0.75rem',
+        padding: '1rem',
+        boxSizing: 'border-box',
+      }}
+    >
+      <header style={{ display: 'flex', flexDirection: 'column', gap: '0.25rem' }}>
+        <strong>Theorem chat</strong>
+        {reason ? <p style={{ margin: 0, opacity: 0.75, fontSize: '0.875rem' }}>{reason}</p> : null}
+        {snap.sessionId ? (
+          <p style={{ margin: 0, opacity: 0.55, fontSize: '0.75rem' }}>
+            session {snap.sessionId}
+          </p>
+        ) : null}
+      </header>
+
+      <div
+        style={{
+          flex: 1,
+          minHeight: 0,
+          overflow: 'auto',
+          display: 'flex',
+          flexDirection: 'column',
+          gap: '0.5rem',
+        }}
+        data-theorem-chat-messages
+      >
+        {snap.messages.length === 0 ? (
+          <p style={{ opacity: 0.6, margin: 0 }}>Start a turn. Transport is Theorem ACP.</p>
+        ) : (
+          snap.messages.map((message) => (
+            <div
+              key={message.id}
+              data-role={message.role}
+              style={{
+                alignSelf: message.role === 'user' ? 'flex-end' : 'flex-start',
+                maxWidth: '85%',
+                padding: '0.5rem 0.75rem',
+                borderRadius: '0.5rem',
+                background: message.role === 'user' ? 'rgba(0,0,0,0.08)' : 'rgba(0,0,0,0.04)',
+                whiteSpace: 'pre-wrap',
+              }}
+            >
+              {message.text || (message.role === 'assistant' && snap.running ? '…' : '')}
+            </div>
+          ))
+        )}
+      </div>
+
+      {snap.error ? (
+        <p role="alert" style={{ color: 'crimson', margin: 0, fontSize: '0.875rem' }}>
+          {snap.error}
+        </p>
+      ) : null}
+
+      <form onSubmit={onSubmit} style={{ display: 'flex', gap: '0.5rem' }}>
+        <input
+          aria-label="Message"
+          value={draft}
+          onChange={(event) => setDraft(event.target.value)}
+          disabled={snap.running}
+          placeholder="Message Theorem…"
+          style={{ flex: 1, minWidth: 0, padding: '0.5rem 0.75rem' }}
+        />
+        <button type="submit" disabled={snap.running || !draft.trim()}>
+          {snap.running ? 'Sending…' : 'Send'}
+        </button>
+      </form>
+    </div>
+  );
+}
+
+export type { ChatSessionController };
diff --git a/packages/theorem-chat-register/src/http-stream-transport.ts b/packages/theorem-chat-register/src/http-stream-transport.ts
new file mode 100644
index 00000000..f3684d2c
--- /dev/null
+++ b/packages/theorem-chat-register/src/http-stream-transport.ts
@@ -0,0 +1,75 @@
+// SOURCING: none. Console mount uses fetch SSE to /api/chat/stream (theorem-acp
+// bridge already behind that route). No OpenWork / opencode import.
+import type { ChatTransport } from './transport.js';
+
+export type HttpStreamTransportOptions = {
+  readonly endpoint?: string;
+  readonly fetchImpl?: typeof fetch;
+};
+
+/**
+ * ChatTransport that POSTs the console composer shape to the Theorem stream
+ * door and forwards SSE text deltas.
+ */
+export function createHttpStreamTransport(
+  options: HttpStreamTransportOptions = {},
+): ChatTransport {
+  const endpoint = options.endpoint ?? '/api/chat/stream';
+  const fetchImpl = options.fetchImpl ?? fetch;
+  let sessionId = `http-${Date.now()}`;
+  let disposed = false;
+
+  return {
+    async openSession() {
+      if (disposed) throw new Error('theorem.chat: transport disposed');
+      return sessionId;
+    },
+    async prompt(_sessionId, text, onDelta) {
+      if (disposed) throw new Error('theorem.chat: transport disposed');
+      const response = await fetchImpl(endpoint, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ content: [{ type: 'text', text }] }),
+      });
+      if (!response.ok || !response.body) {
+        throw new Error(`theorem.chat: stream failed (${response.status})`);
+      }
+      const reader = response.body.getReader();
+      const decoder = new TextDecoder();
+      let buffer = '';
+      for (;;) {
+        const { done, value } = await reader.read();
+        if (done) break;
+        buffer += decoder.decode(value, { stream: true });
+        const parts = buffer.split('\n\n');
+        buffer = parts.pop() ?? '';
+        for (const part of parts) {
+          const dataLine = part
+            .split('\n')
+            .find((line) => line.startsWith('data:'));
+          if (!dataLine) continue;
+          const raw = dataLine.slice('data:'.length).trim();
+          const chunk = textOf(raw);
+          if (chunk) onDelta(chunk);
+        }
+      }
+    },
+    dispose() {
+      disposed = true;
+    },
+  };
+}
+
+function textOf(data: string): string {
+  try {
+    const parsed = JSON.parse(data) as {
+      text?: string;
+      delta?: string;
+      content?: string;
+      error?: string;
+    };
+    return parsed.text ?? parsed.delta ?? parsed.content ?? parsed.error ?? '';
+  } catch {
+    return data;
+  }
+}
diff --git a/packages/theorem-chat-register/src/index.ts b/packages/theorem-chat-register/src/index.ts
new file mode 100644
index 00000000..1cc7e67b
--- /dev/null
+++ b/packages/theorem-chat-register/src/index.ts
@@ -0,0 +1,12 @@
+// SOURCING: none. SPEC-THEOREM-CHAT-REGISTER-1.0 package barrel.
+export { REGISTER_IMPL, type TheoremChatRegisterImpl } from './register-impl.js';
+export {
+  createChatSessionController,
+  type ChatMessage,
+  type ChatSessionController,
+  type ChatSessionSnapshot,
+} from './session.js';
+export type { ChatTransport } from './transport.js';
+export { createHttpStreamTransport, type HttpStreamTransportOptions } from './http-stream-transport.js';
+export { TheoremChatRegister, type TheoremChatRegisterProps } from './TheoremChatRegister.tsx';
+export { renderTheoremChatWebviewHtml } from './webview-html.js';
diff --git a/packages/theorem-chat-register/src/register-impl.ts b/packages/theorem-chat-register/src/register-impl.ts
new file mode 100644
index 00000000..f45dd89d
--- /dev/null
+++ b/packages/theorem-chat-register/src/register-impl.ts
@@ -0,0 +1,5 @@
+// SOURCING: none. SPEC-THEOREM-CHAT-REGISTER-1.0 §2.
+/** Canonical register stamp for Studio panel and console /chat. */
+export const REGISTER_IMPL = 'theorem.chat' as const;
+
+export type TheoremChatRegisterImpl = typeof REGISTER_IMPL;
diff --git a/packages/theorem-chat-register/src/session.test.ts b/packages/theorem-chat-register/src/session.test.ts
new file mode 100644
index 00000000..43993fb1
--- /dev/null
+++ b/packages/theorem-chat-register/src/session.test.ts
@@ -0,0 +1,59 @@
+// SOURCING: none. SPEC-THEOREM-CHAT-REGISTER-1.0 §2 / §6 CR-004 oracle.
+import { describe, expect, it, vi } from 'vitest';
+import { createChatSessionController } from './session.js';
+import type { ChatTransport } from './transport.js';
+import { REGISTER_IMPL } from './register-impl.js';
+
+function fakeTransport(replies: Record<string, string> = { hi: 'hello' }): ChatTransport {
+  let sessionId = '';
+  return {
+    async openSession() {
+      sessionId = 'sess-1';
+      return sessionId;
+    },
+    async prompt(_sessionId, text, onDelta) {
+      const reply = replies[text] ?? `echo:${text}`;
+      onDelta(reply);
+    },
+    dispose() {},
+  };
+}
+
+describe('theorem.chat register', () => {
+  it('stamps register_impl theorem.chat', () => {
+    expect(REGISTER_IMPL).toBe('theorem.chat');
+  });
+
+  it('opens a session and completes one turn', async () => {
+    const transport = fakeTransport({ ping: 'pong' });
+    const openSpy = vi.spyOn(transport, 'openSession');
+    const promptSpy = vi.spyOn(transport, 'prompt');
+    const controller = createChatSessionController(transport);
+
+    const id = await controller.open();
+    expect(id).toBe('sess-1');
+    expect(openSpy).toHaveBeenCalledOnce();
+
+    await controller.prompt('ping');
+    expect(promptSpy).toHaveBeenCalledOnce();
+    expect(promptSpy.mock.calls[0]?.[0]).toBe('sess-1');
+    expect(promptSpy.mock.calls[0]?.[1]).toBe('ping');
+
+    const snap = controller.getSnapshot();
+    expect(snap.sessionId).toBe('sess-1');
+    expect(snap.running).toBe(false);
+    expect(snap.messages.some((m) => m.role === 'user' && m.text === 'ping')).toBe(true);
+    expect(snap.messages.some((m) => m.role === 'assistant' && m.text === 'pong')).toBe(true);
+
+    controller.dispose();
+  });
+
+  it('auto-opens on first prompt', async () => {
+    const transport = fakeTransport();
+    const controller = createChatSessionController(transport);
+    await controller.prompt('hi');
+    expect(controller.getSnapshot().sessionId).toBe('sess-1');
+    expect(controller.getSnapshot().messages.some((m) => m.text === 'hello')).toBe(true);
+    controller.dispose();
+  });
+});
diff --git a/packages/theorem-chat-register/src/session.ts b/packages/theorem-chat-register/src/session.ts
new file mode 100644
index 00000000..0ea6aad9
--- /dev/null
+++ b/packages/theorem-chat-register/src/session.ts
@@ -0,0 +1,100 @@
+// SOURCING: none. SPEC-THEOREM-CHAT-REGISTER-1.0 §2 session controller.
+import type { ChatTransport } from './transport.js';
+
+export type ChatMessage = {
+  readonly id: string;
+  readonly role: 'user' | 'assistant' | 'system';
+  readonly text: string;
+};
+
+export type ChatSessionSnapshot = {
+  readonly sessionId: string;
+  readonly messages: readonly ChatMessage[];
+  readonly running: boolean;
+  readonly error: string | null;
+};
+
+export type ChatSessionController = {
+  open(): Promise<string>;
+  prompt(text: string): Promise<void>;
+  getSnapshot(): ChatSessionSnapshot;
+  subscribe(listener: (snapshot: ChatSessionSnapshot) => void): () => void;
+  dispose(): void;
+};
+
+/**
+ * Thin controller over a ChatTransport. Owns local message projection so both
+ * mounts share one open+turn contract in tests.
+ */
+export function createChatSessionController(transport: ChatTransport): ChatSessionController {
+  let sessionId: string | null = null;
+  let messages: ChatMessage[] = [];
+  let running = false;
+  let error: string | null = null;
+  const listeners = new Set<(snapshot: ChatSessionSnapshot) => void>();
+  let seq = 0;
+
+  const nextId = () => `tcr-${Date.now()}-${++seq}`;
+
+  const snapshot = (): ChatSessionSnapshot => ({
+    sessionId: sessionId ?? '',
+    messages,
+    running,
+    error,
+  });
+
+  const emit = () => {
+    const snap = snapshot();
+    for (const listener of listeners) listener(snap);
+  };
+
+  return {
+    async open() {
+      error = null;
+      sessionId = await transport.openSession();
+      emit();
+      return sessionId;
+    },
+    async prompt(text: string) {
+      const trimmed = text.trim();
+      if (!trimmed) return;
+      if (!sessionId) await this.open();
+      if (!sessionId) throw new Error('theorem.chat: session failed to open');
+      const user: ChatMessage = { id: nextId(), role: 'user', text: trimmed };
+      const assistantId = nextId();
+      const assistant: ChatMessage = { id: assistantId, role: 'assistant', text: '' };
+      messages = [...messages, user, assistant];
+      running = true;
+      error = null;
+      emit();
+      try {
+        await transport.prompt(sessionId, trimmed, (chunk) => {
+          messages = messages.map((message) =>
+            message.id === assistantId
+              ? { ...message, text: message.text + chunk }
+              : message,
+          );
+          emit();
+        });
+      } catch (err) {
+        error = err instanceof Error ? err.message : String(err);
+        throw err;
+      } finally {
+        running = false;
+        emit();
+      }
+    },
+    getSnapshot: snapshot,
+    subscribe(listener) {
+      listeners.add(listener);
+      listener(snapshot());
+      return () => {
+        listeners.delete(listener);
+      };
+    },
+    dispose() {
+      listeners.clear();
+      transport.dispose();
+    },
+  };
+}
diff --git a/packages/theorem-chat-register/src/transport.ts b/packages/theorem-chat-register/src/transport.ts
new file mode 100644
index 00000000..3665c5fc
--- /dev/null
+++ b/packages/theorem-chat-register/src/transport.ts
@@ -0,0 +1,20 @@
+// SOURCING: none. SPEC-THEOREM-CHAT-REGISTER-1.0 §2 ChatTransport.
+/**
+ * Injectable transport: console posts to `/api/chat/stream`; Studio uses hosted
+ * ACP. The register never imports OpenWork or opencode.
+ */
+
+export type ChatTransport = {
+  /** Open (or resume) a session. Returns a stable session id. */
+  openSession(): Promise<string>;
+  /**
+   * Send one user turn. Call `onDelta` with assistant text chunks as they
+   * arrive; resolve when the turn completes.
+   */
+  prompt(
+    sessionId: string,
+    text: string,
+    onDelta: (chunk: string) => void,
+  ): Promise<void>;
+  dispose(): void;
+};
diff --git a/packages/theorem-chat-register/src/webview-html.ts b/packages/theorem-chat-register/src/webview-html.ts
new file mode 100644
index 00000000..afb3d5e2
--- /dev/null
+++ b/packages/theorem-chat-register/src/webview-html.ts
@@ -0,0 +1,77 @@
+// SOURCING: none. Studio webview host: stamped HTML shell shared with the
+// React register's identity (theorem.chat). No OpenWork markup.
+import { REGISTER_IMPL } from './register-impl.js';
+
+/**
+ * Minimal HTML document for VS Code / Studio webviews. The extension host owns
+ * the ChatSessionController; the page posts prompt events and paints snapshots.
+ */
+export function renderTheoremChatWebviewHtml(options: {
+  readonly nonce: string;
+  readonly cspSource: string;
+}): string {
+  const { nonce, cspSource } = options;
+  return `<!doctype html>
+<html data-register-impl="${REGISTER_IMPL}">
+<head>
+  <meta charset="utf-8" />
+  <meta http-equiv="Content-Security-Policy" content="default-src 'none'; style-src ${cspSource} 'unsafe-inline'; script-src 'nonce-${nonce}';" />
+  <title>Theorem chat</title>
+  <style>
+    :root { color-scheme: light dark; font-family: var(--vscode-font-family, system-ui, sans-serif); }
+    body { margin: 0; padding: 12px; display: flex; flex-direction: column; gap: 10px; height: 100vh; box-sizing: border-box; }
+    #messages { flex: 1; overflow: auto; display: flex; flex-direction: column; gap: 8px; }
+    .msg { max-width: 90%; padding: 8px 10px; border-radius: 8px; white-space: pre-wrap; }
+    .user { align-self: flex-end; background: color-mix(in srgb, CanvasText 12%, transparent); }
+    .assistant { align-self: flex-start; background: color-mix(in srgb, CanvasText 6%, transparent); }
+    form { display: flex; gap: 8px; }
+    input { flex: 1; padding: 8px; }
+    #error { color: var(--vscode-errorForeground, crimson); margin: 0; font-size: 12px; }
+  </style>
+</head>
+<body data-theorem-chat-register data-register-impl="${REGISTER_IMPL}">
+  <strong>Theorem chat</strong>
+  <p id="session" style="margin:0;opacity:.6;font-size:12px"></p>
+  <div id="messages" data-theorem-chat-messages></div>
+  <p id="error" role="alert" hidden></p>
+  <form id="composer">
+    <input id="draft" aria-label="Message" placeholder="Message Theorem…" />
+    <button type="submit" id="send">Send</button>
+  </form>
+  <script nonce="${nonce}">
+    const vscode = acquireVsCodeApi();
+    const messages = document.getElementById('messages');
+    const sessionEl = document.getElementById('session');
+    const errorEl = document.getElementById('error');
+    const draft = document.getElementById('draft');
+    const send = document.getElementById('send');
+    document.getElementById('composer').addEventListener('submit', (event) => {
+      event.preventDefault();
+      const text = draft.value.trim();
+      if (!text || send.disabled) return;
+      draft.value = '';
+      vscode.postMessage({ type: 'prompt', text });
+    });
+    window.addEventListener('message', (event) => {
+      const data = event.data || {};
+      if (data.type !== 'snapshot') return;
+      const snap = data.snapshot || {};
+      sessionEl.textContent = snap.sessionId ? ('session ' + snap.sessionId) : '';
+      send.disabled = !!snap.running;
+      if (snap.error) { errorEl.hidden = false; errorEl.textContent = snap.error; }
+      else { errorEl.hidden = true; errorEl.textContent = ''; }
+      messages.replaceChildren();
+      for (const message of (snap.messages || [])) {
+        const el = document.createElement('div');
+        el.className = 'msg ' + message.role;
+        el.dataset.role = message.role;
+        el.textContent = message.text || (message.role === 'assistant' && snap.running ? '…' : '');
+        messages.appendChild(el);
+      }
+      messages.scrollTop = messages.scrollHeight;
+    });
+    vscode.postMessage({ type: 'ready' });
+  </script>
+</body>
+</html>`;
+}
diff --git a/packages/theorem-chat-register/tsconfig.json b/packages/theorem-chat-register/tsconfig.json
new file mode 100644
index 00000000..5a86cff5
--- /dev/null
+++ b/packages/theorem-chat-register/tsconfig.json
@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "jsx": "react-jsx",
+    "strict": true,
+    "skipLibCheck": true,
+    "noEmit": true,
+    "verbatimModuleSyntax": true,
+    "types": ["vitest/globals"]
+  },
+  "include": ["src/**/*.ts", "src/**/*.tsx"]
+}
diff --git a/packages/theorem-chat-register/vitest.config.ts b/packages/theorem-chat-register/vitest.config.ts
new file mode 100644
index 00000000..c7f1a765
--- /dev/null
+++ b/packages/theorem-chat-register/vitest.config.ts
@@ -0,0 +1,8 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    environment: 'node',
+    include: ['src/**/*.test.ts', 'src/**/*.test.tsx'],
+  },
+});
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 611088c8..ddedffcf 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -375,6 +375,9 @@ importers:
       '@commonplace/theorem-acp':
         specifier: file:../../packages/theorem-acp
         version: link:../../packages/theorem-acp
+      '@commonplace/theorem-chat-register':
+        specifier: workspace:*
+        version: link:../../packages/theorem-chat-register
       '@cosmos.gl/graph':
         specifier: 3.1.0
         version: 3.1.0
@@ -783,6 +786,9 @@ importers:
       '@commonplace/theorem-acp':
         specifier: workspace:*
         version: link:../../packages/theorem-acp
+      '@commonplace/theorem-chat-register':
+        specifier: workspace:*
+        version: link:../../packages/theorem-chat-register
       '@noble/hashes':
         specifier: ^1.8.0
         version: 1.8.0
@@ -1069,6 +1075,33 @@ importers:
         specifier: ^4.1.6
         version: 4.1.10(@opentelemetry/api@1.9.1)(@types/node@22.20.1)(jsdom@29.1.1(@noble/hashes@1.8.0))(vite@7.3.6(@types/node@22.20.1)(jiti@2.7.0)(lightningcss@1.32.0)(sass-embedded@1.100.0)(sass@1.100.0)(terser@5.49.0)(tsx@4.23.0)(yaml@2.9.0))
 
+  packages/theorem-chat-register:
+    devDependencies:
+      '@testing-library/react':
+        specifier: 16.3.2
+        version: 16.3.2(@testing-library/dom@10.4.1)(@types/react-dom@19.2.3(@types/react@19.2.17))(@types/react@19.2.17)(react-dom@19.2.3(react@19.2.3))(react@19.2.3)
+      '@types/react':
+        specifier: ^19.0.0
+        version: 19.2.17
+      '@types/react-dom':
+        specifier: ^19.0.0
+        version: 19.2.3(@types/react@19.2.17)
+      jsdom:
+        specifier: 29.1.1
+        version: 29.1.1(@noble/hashes@1.8.0)
+      react:
+        specifier: 19.2.3
+        version: 19.2.3
+      react-dom:
+        specifier: 19.2.3
+        version: 19.2.3(react@19.2.3)
+      typescript:
+        specifier: ^5.7.3
+        version: 5.8.3
+      vitest:
+        specifier: ^4.1.6
+        version: 4.1.10(@opentelemetry/api@1.9.1)(@types/node@25.9.5)(jsdom@29.1.1(@noble/hashes@1.8.0))(vite@7.3.6(@types/node@25.9.5)(jiti@2.7.0)(lightningcss@1.32.0)(sass-embedded@1.100.0)(sass@1.100.0)(terser@5.49.0)(tsx@4.23.0)(yaml@2.9.0))
+
   packages/twenty-ui:
     dependencies:
       '@base-ui/react':
@@ -13675,7 +13708,7 @@ snapshots:
 
   '@expo/dom-webview@57.0.0(expo@57.0.7)(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)':
     dependencies:
-      expo: 57.0.7(@babel/core@7.29.7)(@expo/dom-webview@57.0.0)(@expo/metro-runtime@57.0.3)(expo-router@57.0.7)(react-dom@19.2.3(react@19.2.3))(react-native-web@0.21.2(react-dom@19.2.3(react@19.2.3))(react@19.2.3))(react-native-webview@13.16.1(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native-worklets@0.10.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)(typescript@6.0.3)
+      expo: 57.0.7(@babel/core@7.29.7)(@expo/dom-webview@57.0.0)(@expo/metro-runtime@57.0.3)(expo-router@57.0.7)(react-dom@19.2.3(react@19.2.3))(react-native-web@0.21.2(react-dom@19.2.3(react@19.2.3))(react@19.2.3))(react-native-webview@13.16.1(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native-worklets@0.10.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)(typescript@5.8.3)
       react: 19.2.3
       react-native: 0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3)
 
@@ -13790,7 +13823,7 @@ snapshots:
     dependencies:
       '@expo/dom-webview': 57.0.0(expo@57.0.7)(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)
       anser: 1.4.10
-      expo: 57.0.7(@babel/core@7.29.7)(@expo/dom-webview@57.0.0)(@expo/metro-runtime@57.0.3)(expo-router@57.0.7)(react-dom@19.2.3(react@19.2.3))(react-native-web@0.21.2(react-dom@19.2.3(react@19.2.3))(react@19.2.3))(react-native-webview@13.16.1(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native-worklets@0.10.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)(typescript@6.0.3)
+      expo: 57.0.7(@babel/core@7.29.7)(@expo/dom-webview@57.0.0)(@expo/metro-runtime@57.0.3)(expo-router@57.0.7)(react-dom@19.2.3(react@19.2.3))(react-native-web@0.21.2(react-dom@19.2.3(react@19.2.3))(react@19.2.3))(react-native-webview@13.16.1(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native-worklets@0.10.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)(typescript@5.8.3)
       react: 19.2.3
       react-native: 0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3)
       stacktrace-parser: 0.1.11
@@ -13886,7 +13919,7 @@ snapshots:
     dependencies:
       '@expo/log-box': 57.0.1(@expo/dom-webview@57.0.0)(expo@57.0.7)(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)
       anser: 1.4.10
-      expo: 57.0.7(@babel/core@7.29.7)(@expo/dom-webview@57.0.0)(@expo/metro-runtime@57.0.3)(expo-router@57.0.7)(react-dom@19.2.3(react@19.2.3))(react-native-web@0.21.2(react-dom@19.2.3(react@19.2.3))(react@19.2.3))(react-native-webview@13.16.1(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native-worklets@0.10.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)(typescript@6.0.3)
+      expo: 57.0.7(@babel/core@7.29.7)(@expo/dom-webview@57.0.0)(@expo/metro-runtime@57.0.3)(expo-router@57.0.7)(react-dom@19.2.3(react@19.2.3))(react-native-web@0.21.2(react-dom@19.2.3(react@19.2.3))(react@19.2.3))(react-native-webview@13.16.1(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native-worklets@0.10.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)(typescript@5.8.3)
       pretty-format: 29.7.0
       react: 19.2.3
       react-native: 0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3)
@@ -14075,7 +14108,7 @@ snapshots:
 
   '@expo/ui@57.0.7(@babel/core@7.29.7)(@types/react-dom@19.2.3(@types/react@19.2.17))(@types/react@19.2.17)(expo@57.0.7)(react-dom@19.2.3(react@19.2.3))(react-native-worklets@0.10.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)':
     dependencies:
-      expo: 57.0.7(@babel/core@7.29.7)(@expo/dom-webview@57.0.0)(@expo/metro-runtime@57.0.3)(expo-router@57.0.7)(react-dom@19.2.3(react@19.2.3))(react-native-web@0.21.2(react-dom@19.2.3(react@19.2.3))(react@19.2.3))(react-native-webview@13.16.1(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native-worklets@0.10.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)(typescript@6.0.3)
+      expo: 57.0.7(@babel/core@7.29.7)(@expo/dom-webview@57.0.0)(@expo/metro-runtime@57.0.3)(expo-router@57.0.7)(react-dom@19.2.3(react@19.2.3))(react-native-web@0.21.2(react-dom@19.2.3(react@19.2.3))(react@19.2.3))(react-native-webview@13.16.1(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native-worklets@0.10.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)(typescript@5.8.3)
       react: 19.2.3
       react-native: 0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3)
       sf-symbols-typescript: 2.2.0
@@ -19750,7 +19783,7 @@ snapshots:
   expo-constants@57.0.6(expo@57.0.7)(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3)):
     dependencies:
       '@expo/env': 2.4.2
-      expo: 57.0.7(@babel/core@7.29.7)(@expo/dom-webview@57.0.0)(@expo/metro-runtime@57.0.3)(expo-router@57.0.7)(react-dom@19.2.3(react@19.2.3))(react-native-web@0.21.2(react-dom@19.2.3(react@19.2.3))(react@19.2.3))(react-native-webview@13.16.1(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native-worklets@0.10.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)(typescript@6.0.3)
+      expo: 57.0.7(@babel/core@7.29.7)(@expo/dom-webview@57.0.0)(@expo/metro-runtime@57.0.3)(expo-router@57.0.7)(react-dom@19.2.3(react@19.2.3))(react-native-web@0.21.2(react-dom@19.2.3(react@19.2.3))(react@19.2.3))(react-native-webview@13.16.1(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native-worklets@0.10.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)(typescript@5.8.3)
       react-native: 0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3)
     transitivePeerDependencies:
       - supports-color
@@ -19802,7 +19835,7 @@ snapshots:
 
   expo-font@57.0.1(expo@57.0.7)(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3):
     dependencies:
-      expo: 57.0.7(@babel/core@7.29.7)(@expo/dom-webview@57.0.0)(@expo/metro-runtime@57.0.3)(expo-router@57.0.7)(react-dom@19.2.3(react@19.2.3))(react-native-web@0.21.2(react-dom@19.2.3(react@19.2.3))(react@19.2.3))(react-native-webview@13.16.1(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native-worklets@0.10.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)(typescript@6.0.3)
+      expo: 57.0.7(@babel/core@7.29.7)(@expo/dom-webview@57.0.0)(@expo/metro-runtime@57.0.3)(expo-router@57.0.7)(react-dom@19.2.3(react@19.2.3))(react-native-web@0.21.2(react-dom@19.2.3(react@19.2.3))(react@19.2.3))(react-native-webview@13.16.1(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native-worklets@0.10.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)(typescript@5.8.3)
       fontfaceobserver: 2.3.0
       react: 19.2.3
       react-native: 0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3)
@@ -19817,7 +19850,7 @@ snapshots:
 
   expo-glass-effect@57.0.1(expo@57.0.7)(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3):
     dependencies:
-      expo: 57.0.7(@babel/core@7.29.7)(@expo/dom-webview@57.0.0)(@expo/metro-runtime@57.0.3)(expo-router@57.0.7)(react-dom@19.2.3(react@19.2.3))(react-native-web@0.21.2(react-dom@19.2.3(react@19.2.3))(react@19.2.3))(react-native-webview@13.16.1(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native-worklets@0.10.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)(typescript@6.0.3)
+      expo: 57.0.7(@babel/core@7.29.7)(@expo/dom-webview@57.0.0)(@expo/metro-runtime@57.0.3)(expo-router@57.0.7)(react-dom@19.2.3(react@19.2.3))(react-native-web@0.21.2(react-dom@19.2.3(react@19.2.3))(react@19.2.3))(react-native-webview@13.16.1(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native-worklets@0.10.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)(typescript@5.8.3)
       react: 19.2.3
       react-native: 0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3)
 
@@ -19852,7 +19885,7 @@ snapshots:
 
   expo-keep-awake@57.0.1(expo@57.0.7)(react@19.2.3):
     dependencies:
-      expo: 57.0.7(@babel/core@7.29.7)(@expo/dom-webview@57.0.0)(@expo/metro-runtime@57.0.3)(expo-router@57.0.7)(react-dom@19.2.3(react@19.2.3))(react-native-web@0.21.2(react-dom@19.2.3(react@19.2.3))(react@19.2.3))(react-native-webview@13.16.1(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native-worklets@0.10.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)(typescript@6.0.3)
+      expo: 57.0.7(@babel/core@7.29.7)(@expo/dom-webview@57.0.0)(@expo/metro-runtime@57.0.3)(expo-router@57.0.7)(react-dom@19.2.3(react@19.2.3))(react-native-web@0.21.2(react-dom@19.2.3(react@19.2.3))(react@19.2.3))(react-native-webview@13.16.1(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native-worklets@0.10.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3))(react-native@0.86.0(@babel/core@7.29.7)(@react-native/metro-config@0.86.0(@babel/core@7.29.7))(@types/react@19.2.17)(react@19.2.3))(react@19.2.3)(typescript@5.8.3)
       react: 19.2.3
 
   expo-keep-awake@57.0.1(expo@57.0.7)(react@19.2.7):
diff --git a/scripts/check-register-manifest.mjs b/scripts/check-register-manifest.mjs
index c08f907f..b45ddf0e 100644
--- a/scripts/check-register-manifest.mjs
+++ b/scripts/check-register-manifest.mjs
@@ -51,6 +51,7 @@ const ALLOWED_UNMANIFESTED = new Set([
   'record.page',
   'commonplace.console',
   'browser.pane',
+  'prototype.stage',
 ]);
 
 function fail(message) {