# Phase 0 audio follow-up with changed user agent

**Result:** Offline restoration, native tone, and data-URL worklet passed as user-performed manual evidence.

The [user-supplied evidence](2026-09-04-user-offline-audio.json) records a page start at `2026-09-05T03:01:55.614Z`, successful cache restoration, a heard tone with completed node cleanup, and successful worklet loading and connection at `2026-09-05T03:02:40.836Z`. The audio context runs at 48,000 Hz. No errors or policy violations were reported.

The user agent now identifies Android 15 / Pixel 9 / Mobile Chrome 152, while platform remains Win32 and the URL remains the original Windows file path. Viewport is 1186 × 872 with DPR 2. This is consistent with desktop device emulation, but its activation was not explicitly confirmed. It does not establish behavior on a physical Android device.

After being asked whether the browser network setting was explicitly Offline throughout this run, the user confirmed: “Yes, it was set to offline”. This manual confirmation establishes the test condition and completes the offline probe check. The raw JSON remains unchanged: `onlineFlag` is true and authored requests are zero. Neither field alone establishes offline operation; the result relies on the user's confirmation together with the observed restoration and audio/worklet results. This was browser-scoped offline testing, not a change to system networking.

Both fixture definitions are restored, but activation of each is not captured. Remaining import/fallback and browser profile/storage-mode observations remain separate checks. This result does not complete Phase 0 or establish offline conformance of a production runtime.