# HANDOFF — session state

> Current operational state, read right after `TASKS.md`. Trust this file as the
> truth of what is in flight — do not re-derive from git/fs unless it points at
> a problem. Conventions: [`schema.md`](schema.md). Rewrite this file at session
> end, compaction, or any interruption.

## Session state (last updated: 2026-08-13)

- **Branch:** `main`. The **game audio bar + mic status dot + always-on capture**
  work is **uncommitted** (see list below). The last committed+pushed baseline is
  `ea250c0` (social bar click-toggle).
- **This session (audio UX follow-up):** per the creator's requests —
  1. The MIC label is now a **button with a status dot** (`Models/MicStatus`:
     green = capturing, yellow = requested mic problem, red = no device).
  2. **Mic capture runs for the app's lifetime** (started at startup via
     `StartMicCaptureAsync`, disposed in `Shutdown`; `BeginGoLive`/`StopStream`
     no longer start/stop the mixer) so both meters preview live.
  3. A **game audio bar** (desktop/game — meter + mute + volume, mirror of the
     mic bar) sits centered beneath the preview and appears only while a
     **full-screen game is producing sound** (decision: fullscreen + loopback
     sound; **silence never hides an active bar** — the creator's final rule).
     Show after ~500ms of fullscreen+sound, hide ~1s after leaving fullscreen.
- **Uncommitted files:** `MainWindow.xaml`/`.cs`, `ViewModels/MainViewModel.cs`,
  `Services/Audio/{IAudioSource,WasapiMicAudioSource,WasapiLoopbackAudioSource,AudioMixer}.cs`,
  new `Models/MicStatus.cs`, new `Services/{IGameAudioDetector,GameAudioHysteresis,GameAudioDetector}.cs`,
  `ytLive.Tests/AudioMixerTests.cs`, new `GameAudioHysteresisTests.cs` +
  `GameAudioDetectorTests.cs`, memory docs (TASKS.md, ai.md, Services/index.md,
  ViewModels/index.md, Models/index.md, HANDOFF).
- **Verified:** build 0 warnings, 0 errors; **167 tests passing** (full suite,
  after the final rebuild).
- **Landmines:**
  - Never set a local `Canvas.SetTop` on the social bar — a local value permanently
    overrides `{Binding SocialBarTop}` (the `ClearValue` lesson from 5.5).
  - `AudioMixer` meter `Push` is unconditional **by design now**: `OnMicSample`/
    `OnLoopbackSample` compute the level first, then raise the event — a
    `?.Invoke(meter.Push(...))` short-circuit skipped the meter update when
    nothing was subscribed (found by `RestartMic_ResetsLevel`, fixed).
  - `MicConnected` comes from the source `Started` event, raised right after
    `StartRecording()` succeeds — tests must `MarkStarted()` the fake source
    before asserting connection state.
  - Zero mic devices at startup = red dot AND the mixer is never started, so
    loopback + the game bar can't run either (no capture at all) — acceptable.
  - The game detector is polled on the UI thread via a 250ms `DispatcherTimer`;
    `OnGameAudioPollTick` wraps `Poll()` in try/catch + `AppLog`.
  - The pump reads the active scene on a background thread while the UI can still
    edit it — a concurrent-mutation exception is contained (logged + `Failed` +
    the pump stops), not a crash.
  - `StopAsync` must stop the encoder (closes stdin) **before** awaiting the pump
    loop — closing stdin unblocks a write stuck on pipe backpressure; the reverse
    order deadlocks.
  - Tests never instantiate `MainViewModel` directly except the round-clip
    integration test (a real `MainWindow`), which never goes live — keep it that way.
  - Sandbox can't reach outbound HTTPS — `HttpSocialValidator` stub-handler tests
    only, never the real instance.
- **Next step:** commit + push the audio UX follow-up (the whole uncommitted set
  above in one commit). Then TASK 4 ship step 6 — health stats: bind
  `FramePump.HealthUpdated` (bitrate/FPS/duration) into the bottom bar. Nothing
  else queued — do not expand the task queue on your own. Optional, not queued:
  rewriting the healed entry's `ProfileUrl` to
  `https://mastodon.llamachile.tube/@gramps` (user must say the word).

- **Secret/DB/port facts live:** OAuth client id/secret in `Helpers/OAuthCredentials.cs`;
  OAuth session token in `Helpers/TokenStore.cs` (DPAPI → `%APPDATA%\ytLlive\ytLlive.auth`);
  layout DB `%APPDATA%\ytLlive\ytLlive.db` (schema v8; `SocialEntry.Software`
  column is a column-presence migration like the others, no version bump); OAuth callback
  `http://localhost:8765/oauth2/callback`; crash log `%APPDATA%\ytLlive\startup.log`.