# HANDOFF — Session State

## Branch / Commit State

**`main`**, last pushed commit **`46f4696`** (manual-rename modal). Working tree is **DIRTY** —
TASK 21 Increment A (model + persistence for media sources) is fully implemented, verified, and
ready to commit. See "In flight" below.

No feature branches pre-1.0: all work lands on `main` per work unit.

## In flight: TASK 21 — next bounded slice = Increment B (FFmpeg video decoder, items 4–5)

**What is DONE (uncommitted, ready to commit):** Increment A — `SourceType.MediaSource` enum,
`MediaSourceType`/`MediaPlaybackState` enums, media config fields on `Source` (`MediaPath`,
`MediaIsLooping`, `MediaVolume`, `MediaPlaybackState`), LayoutStore migration + SELECT + INSERT,
round-trip test (`MediaSource_Config_Survives_Save_And_Reload`). Build 0 warnings, 245/247 tests
(2 known failures), scope check clean.

**What is NOT started (Increment B):** `MediaVideoDecoder` — FFmpeg-based video decoder → `VideoFrame`.
Needs ffmpeg present on Windows PATH or in `%APPDATA%\ytLlive\tools` to test. Currently absent:
neither `ffmpeg.exe` on PATH nor in tools cache (locator's network pull hasn't run). This is a
**run-the-app wall** — not blocked from writing the code, but blocked from headless integration
testing. Can be shipped as a compile-verified code commit gated on creator run, or deferred until
ffmpeg is present.

## Landmines (unchanged)

- **Pre-existing test failures (do not chase):** `AudioPipelineTests.Mix_HonorsProviderGains…` +
  `RoundClipInteractionTests.Round_Clip_Corner_Is_Grabbable…`.
- **App running locks `ytLive.exe`** → build fails MSB3027 until the creator exits the app.
- **Real-MainWindow tests MUST set `LayoutPathOverride`** — DB pollution wiped real data once.
- **Pre-commit gate:** run `./scripts/verify.sh <scope...>` — clean build (0 warnings) + full tests +
  scope check. Do NOT trust an incremental build's "0 warnings".
- **Good Dog Rule:** ONE integration test per change.
- **🔬 Derived-solution rule:** record one-off solutions in `MyMistakes.md` recipes registry same session.
- Startup diagnostics: `%APPDATA%\ytLlive\startup.log`.
- Media-source feature is large (12 items); each later slice (decode, compositor wiring, loop/volume,
  UI) is its own bounded increment — decoder needs ffmpeg present, can't be headless-tested unless
  ffmpeg is installed (currently absent from Windows PATH + empty tools cache).

## Todo state

- TASK 18: fully shipped (`a9eb360` recording, `c8374bd` docs, `be529a4` verify.sh, `46f4696` rename
  modal). Only remaining = **running-app verification** (creator must run the WPF app).
- TASK 21: Increment A (model + persistence) done and ready to commit. Increment B (ffmpeg decoder)
  is the next bounded slice — compile-verifiable without ffmpeg, but integration test is walled.
- TASK 22 (audio sync offset): not started.

## Next steps

1. Commit + push Increment A (the code is ready, gates passed, TASKS/HANDOFF docs updated).
2. Commit + push the handoff correction (HANDOFF says done, not partial).
3. Running-app verification of TASK 18 rename/dual-output (creator) — one of two run-app walls.
4. Increment B: write `MediaVideoDecoder` (FFmpeg → BGRA8 `VideoFrame`), compile-verified, gated on
   creator run for integration test (ffmpeg not present headlessly).
5. Later TASK 21 slices + TASK 22.