diff --git a/app/apps/shell-super-app/shared/ultramodern-build.ts b/app/apps/shell-super-app/shared/ultramodern-build.ts
index 94ee4f1c4..93519a289 100644
--- a/app/apps/shell-super-app/shared/ultramodern-build.ts
+++ b/app/apps/shell-super-app/shared/ultramodern-build.ts
@@ -55,3 +55,4 @@ const ultramodernBuildArtifact = resolveUltramodernBuildArtifact(
 );
 
 export const ultramodernDeliveryUnit = ultramodernBuildArtifact.deliveryUnit;
+export const ultramodernUiMarker = ultramodernBuildArtifact.surfaces.ui;
diff --git a/app/apps/shell-super-app/src/routes/layout.tsx b/app/apps/shell-super-app/src/routes/layout.tsx
index 499f6c48e..60b781778 100644
--- a/app/apps/shell-super-app/src/routes/layout.tsx
+++ b/app/apps/shell-super-app/src/routes/layout.tsx
@@ -1,10 +1,12 @@
 import { Outlet } from '@modern-js/plugin-tanstack/runtime';
 
+import { ultramodernUiMarker } from '../../shared/ultramodern-build.ts';
+
 import './ui-kit.css';
 import './index.css';
 
 const Layout = () => (
-  <div data-app-id="shell-super-app">
+  <div data-app-id="shell-super-app" data-build-marker={ultramodernUiMarker.build}>
     <Outlet />
   </div>
 );
diff --git a/app/apps/shell-super-app/tests/unit/layout.test.tsx b/app/apps/shell-super-app/tests/unit/layout.test.tsx
index 8652cca56..d42d5726f 100644
--- a/app/apps/shell-super-app/tests/unit/layout.test.tsx
+++ b/app/apps/shell-super-app/tests/unit/layout.test.tsx
@@ -11,6 +11,7 @@ import { afterEach, expect, it, rstest, test } from 'effect-rstest';
 import type { ComponentProps, ReactNode } from 'react';
 
 import { AppIdSchema } from '../../shared/api';
+import { ultramodernUiMarker } from '../../shared/ultramodern-build.ts';
 import Layout from '../../src/routes/layout';
 import { AuthenticatedDashboardLayout } from '../../src/routes/shell-frame';
 
@@ -153,6 +154,13 @@ test('leaves route content free of global user-perceivable UI', () => {
   expect(document.body.textContent?.trim()).toBe('Current route');
 });
 
+test('marks every server-rendered Shell route with its UI release marker', () => {
+  const { container } = render(<Layout />);
+
+  const root = container.querySelector<HTMLElement>('[data-app-id="shell-super-app"]');
+  expect(root?.dataset['buildMarker']).toBe(ultramodernUiMarker.build);
+});
+
 test('renders the default Home dashboard contract and preserves page children', () => {
   render(
     <AuthenticatedDashboardLayout
diff --git a/app/verticals/party-registry/src/routes/[lang]/layout.tsx b/app/verticals/party-registry/src/routes/[lang]/layout.tsx
new file mode 100644
index 000000000..fe98b658a
--- /dev/null
+++ b/app/verticals/party-registry/src/routes/[lang]/layout.tsx
@@ -0,0 +1,14 @@
+import { Outlet } from '@modern-js/plugin-tanstack/runtime';
+import type { ReactElement } from 'react';
+
+import { ultramodernUiMarker } from '../../../shared/ultramodern-build.ts';
+
+// Pages under this layout double as Shell module pages, so the UI release marker lives here,
+// where only this vertical's own Worker renders it; the root layout stays the generated scaffold.
+const LanguageLayout = (): ReactElement => (
+  <div data-build-marker={ultramodernUiMarker.build}>
+    <Outlet />
+  </div>
+);
+
+export default LanguageLayout;
diff --git a/app/verticals/party-registry/tests/components/language-layout.test.tsx b/app/verticals/party-registry/tests/components/language-layout.test.tsx
new file mode 100644
index 000000000..7b0db15ee
--- /dev/null
+++ b/app/verticals/party-registry/tests/components/language-layout.test.tsx
@@ -0,0 +1,19 @@
+import { cleanup, render } from '@testing-library/react';
+import { afterEach, expect, rstest, test } from 'effect-rstest';
+
+import { ultramodernUiMarker } from '../../shared/ultramodern-build.ts';
+import LanguageLayout from '../../src/routes/[lang]/layout.tsx';
+
+rstest.mock('@modern-js/plugin-tanstack/runtime', () => ({
+  Outlet: () => <main>Current route</main>,
+}));
+
+afterEach(cleanup);
+
+test('marks every localized Party Registry route with its UI release marker', () => {
+  const { container } = render(<LanguageLayout />);
+
+  const root = container.querySelector<HTMLElement>('[data-build-marker]');
+  expect(root?.dataset['buildMarker']).toBe(ultramodernUiMarker.build);
+  expect(root?.textContent).toBe('Current route');
+});