diff --git a/docs/ISSUE-250-PRIMARY-DEVICE-AUDIO-POLICY-ARTIFACT.md b/docs/ISSUE-250-PRIMARY-DEVICE-AUDIO-POLICY-ARTIFACT.md
new file mode 100644
index 0000000..8239f2d
--- /dev/null
+++ b/docs/ISSUE-250-PRIMARY-DEVICE-AUDIO-POLICY-ARTIFACT.md
@@ -0,0 +1,16 @@
+# Issue #250 Artifact — MVP guardrail (telefon-klient uden lydafspilning)
+
+## Scope
+Implementeret guardrail for `primary-device only` audio policy i SPA player-flow.
+
+## Acceptance mapping
+1. **Telefon-klient flow indeholder ingen audio-play init-path**
+   - Test: `player-shell.component.spec.ts` → `does not trigger original media play during player-shell init path`.
+2. **Primær enhed policy er dokumenteret og testbar**
+   - Policy i contract: `shared/i18n/lobby.json` → `frontend.capabilities.client_has_no_audio_output=true`.
+   - Testbar via eksisterende guard-tests + init-path test i player-shell specs.
+3. **Krav er refereret i SPA-plan/cutover-noter**
+   - Dokumenteret i `docs/spa-cutover-flag.md` under *MVP audio policy guardrail (telefon-klient)*.
+
+## UX/i18n note
+- Player shell viser advarselstekst via i18n key: `frontend.ui.player.audio_policy_notice`.
diff --git a/docs/spa-cutover-flag.md b/docs/spa-cutover-flag.md
index 3f9a79c..edbf900 100644
--- a/docs/spa-cutover-flag.md
+++ b/docs/spa-cutover-flag.md
@@ -65,3 +65,10 @@ Target: rollback + sanity-verifikation inden for 10 minutter.
 - Flag ON (host deep-link): `UiScreenTests.test_host_screen_deeplink_preserves_spa_path_when_feature_flag_enabled`
 - Flag ON (player): `UiScreenTests.test_player_screen_can_render_angular_shell_when_feature_flag_enabled`
 - Smoke-checkliste for cutover paths: `docs/STAGING_GAMEPLAY_SMOKE_ARTIFACT.md` + `docs/UI_SMOKE.md`
+
+
+## MVP audio policy guardrail (telefon-klient)
+- Telefon-/player-klienten må ikke starte lydafspilning lokalt i MVP (`primary-device only`).
+- Policy er bundet til capability-flaget `frontend.capabilities.client_has_no_audio_output=true` i `shared/i18n/lobby.json`.
+- Brugeradvarsel i player UI leveres via i18n key: `frontend.ui.player.audio_policy_notice`.
+- Acceptance-spec er dækket i Angular tests (`player-shell.component.spec.ts`), inkl. at init-path ikke kalder original media `play`.
diff --git a/frontend/angular/src/app/features/player/player-shell.component.spec.ts b/frontend/angular/src/app/features/player/player-shell.component.spec.ts
index a97fe0c..ed8b19a 100644
--- a/frontend/angular/src/app/features/player/player-shell.component.spec.ts
+++ b/frontend/angular/src/app/features/player/player-shell.component.spec.ts
@@ -1,5 +1,6 @@
 import { afterEach, describe, expect, it, vi } from 'vitest';
 
+import lobbyCatalog from '../../../../../../shared/i18n/lobby.json';
 import { PlayerShellComponent } from './player-shell.component';
 
 type FetchMock = ReturnType<typeof vi.fn>;
@@ -443,4 +444,51 @@ describe('PlayerShellComponent gameplay wiring', () => {
     secondComponent.ngOnDestroy();
     await expect(mediaPrototype.play()).rejects.toThrow('original play');
   });
+
+  it('does not trigger original media play during player-shell init path', () => {
+    const originalPlay = vi.fn().mockResolvedValue(undefined);
+    const mediaPrototype = { play: originalPlay };
+
+    vi.stubGlobal('window', {
+      location: { hash: '', search: '' },
+      history: { state: null, replaceState: vi.fn() },
+      localStorage: { getItem: vi.fn().mockReturnValue('en'), setItem: vi.fn(), removeItem: vi.fn() },
+      sessionStorage: { getItem: vi.fn().mockReturnValue(null), setItem: vi.fn(), removeItem: vi.fn() },
+      HTMLMediaElement: { prototype: mediaPrototype },
+      addEventListener: vi.fn(),
+      removeEventListener: vi.fn(),
+    });
+    vi.stubGlobal('navigator', { language: 'en-US', onLine: true });
+
+    const component = new PlayerShellComponent();
+    component.ngOnInit();
+
+    expect(originalPlay).not.toHaveBeenCalled();
+
+    component.ngOnDestroy();
+  });
+
+  it('resolves i18n warning copy from shared catalog without key fallback', () => {
+    const component = new PlayerShellComponent();
+
+    const notice = component.copy('player.audio_policy_notice');
+    const expected = lobbyCatalog.frontend.ui.player.audio_policy_notice[component.locale];
+
+    expect(notice).toBe(expected);
+    expect(notice).not.toBe('player.audio_policy_notice');
+  });
+
+  it('gates template warning notice on the no-audio-output capability flag', () => {
+    const templateSource = String((PlayerShellComponent as any).ɵcmp?.template);
+
+    expect(templateSource).toContain('clientHasNoAudioOutput');
+
+    const component = new PlayerShellComponent();
+    expect(component.copy('player.audio_policy_notice')).not.toBe('player.audio_policy_notice');
+    expect(component.clientHasNoAudioOutput).toBe(true);
+
+    (component as any).clientHasNoAudioOutput = false;
+    expect(component.clientHasNoAudioOutput).toBe(false);
+  });
+
 });
diff --git a/frontend/angular/src/app/features/player/player-shell.component.ts b/frontend/angular/src/app/features/player/player-shell.component.ts
index 6542e4b..393723a 100644
--- a/frontend/angular/src/app/features/player/player-shell.component.ts
+++ b/frontend/angular/src/app/features/player/player-shell.component.ts
@@ -45,6 +45,7 @@ function resolveLocalStorage(): Storage | undefined {
   imports: [CommonModule, FormsModule],
   template: `
     <h2>{{ copy('player.title') }}</h2>
+    <p *ngIf="clientHasNoAudioOutput" class="hint">{{ copy('player.audio_policy_notice') }}</p>
 
     <div class="panel" [attr.data-client-has-no-audio-output]="clientHasNoAudioOutput">
       <label>{{ copy('common.session_code') }} <input [(ngModel)]="sessionCode" /></label>
diff --git a/shared/i18n/lobby.json b/shared/i18n/lobby.json
index 39f4135..c7cf10f 100644
--- a/shared/i18n/lobby.json
+++ b/shared/i18n/lobby.json
@@ -264,6 +264,10 @@
         "guess_submit_failed": {
           "en": "Guess submit failed",
           "da": "Gætte-fejl"
+        },
+        "audio_policy_notice": {
+          "en": "Audio playback is disabled on phone clients. Sound is available on the primary host device.",
+          "da": "Lydafspilning er slået fra på telefon-klienten. Lyd afspilles kun på den primære værtsenhed."
         }
       }
     },