# HANDOFF — 2026-09-22 (TASK 41 Test Stream mode shipped; TASK 40 plan queued)

## Branch / Commit State

`main` HEAD = **`4d9188a` — docs(plan): TASK 40 App Settings round — saved plan**. Pushed state
at `197ee81`. **Working tree DIRTY — TASK 41 implementation in progress** (code + docs staged for
a single scope-checked commit; HANDOFF rewrite rides in a final docs commit):

```
?? HANDOFF.md                      (this rewrite)
 M Models/YouTube.cs
 M Services/YouTubeStreamService.cs
 M Services/YouTubeChatService.cs
 ?? Services/TestSessionViewModel.cs
 M ViewModels/MainViewModel.cs
 M ViewModels/MainViewModel.Ypp.cs
 M ViewModels/MainViewModel.Account.cs
 M ViewModels/MainViewModel.Streaming.cs
 M ViewModels/MainViewModel.Streaming.Operations.cs
 M Controls/TopBar.xaml
 M Controls/PreviewPane.xaml
 ?? ytLive.Tests/TestStreamTests.cs
 M TASKS.md
 ?? TASKS/task-41-test-stream-mode.md
 M ai.md
```

Build impact: main + tests build clean, **0 warnings**; **314/314 tests pass** (313 prior + 1 new
Good Dog). A flaky real-camera startup test aborted one earlier full-suite run (hardware-dependent,
unrelated to this change); the clean rerun passes fully.

## What shipped — TASK 41: Test Stream mode (2026-09-22)

Full record: **`TASKS/task-41-test-stream-mode.md`**. Decisions locked with the creator:
chat-overlay-events-only (no stinger/TTS — stays TASK 3 16/17/20), TEST drawer in the right rail,
hybrid simulation (real text insert + local synthetic events). Key design: since every broadcast is
already private-only (`CreateBroadcast` hardcodes `privacyStatus=private`), "Test" is a **session
variant**: `BeginTestStream` → extracted-shared `StartStreamingSession(alsoRecord:false)` (no
dialog, no "last live" stamp, no recording). `IsTestStream` = gold top bar (`#9c6f1c`) + TEST badge
+ "End Test" button face. `TestSession.BeginTest(broadcastId, liveChatId)` opens the TEST drawer
once the liveChatId resolves. Mock Chat Input = real `liveChat/messages.insert` round-trip;
simulated events inject through the poller's `MessageReceived` seam marked `IsSimulated` (hard API
fact: insert only creates text — non-text events are local-only by design). Three-way drawer
exclusivity (Stream Settings / YPP / TEST) in `MainViewModel.Ypp.cs`.

**Good Dog** — `ytLive.Tests/TestStreamTests.cs` (one `[Fact]`): coordinator protocol w/ fake HTTP
(insert POST body asserted; simulated shapes verified) + real-window exclusivity/gate. Note: the
coordinator section runs on the test thread directly (pure services, no WPF), the window section via
`RealAppHost.Run` — deviates from YppPullOutTests' all-in-one-Run shape for debuggable stacks.

## ⚠️ Around the task

- **Manual verification still owed** (needs a real run, Windows): Test button → gold face + badge +
  auto-open TEST drawer; send a message → appears on a ChatBox overlay after ~2s; simulated rows
  render text/member/SuperChat styled; End Test closes it all out cleanly (transition complete).
- The app may be **RUNNING** — in-place build fails MSB3021/MSB3027 until closed (temp-OutDir
  workaround in ai.md). Close it before the manual pass.
- The full-suite flake earlier: real-camera startup test under the test host (hardware, pre-existing
  behavior; unrelated to TASK 41).
- LayerReorderPersistenceTests.RealMouseDrag flaked once pre-TASK-38 (fullscreen game); unrelated.
- `subscriberCount` rounded to 3 sig figs (YPP); carried. YPP slice 2 needs re-consent — do NOT
  merge with other units.
- Polar product `d105dfa1…` still `$99/yr` — must become one-time before launch (carried).
  `MARCOM.md`/`MONETIZATION.md` gitignored — never commit.

## Next step

Commit TASK 41 (scope-check the declared list first), then **TASK 40 App Settings round is queued**
(`TASKS/task-40-app-settings-round.md`, units A → B → C → D, one Good Dog each). Unit A's
SharedReadOnly control-write question is the one genuinely uncertain technical point — run its
mitigation ladder, spin-guard research before a third guess. Push only on the user's say-so.

## Critical working rules (unchanged, still binding)

- **Good Dog = ONE integration test per change.**
- **Scope lock:** declare the file list before editing; `./scripts/scope-check.sh` before commit.
- WSL builds use the Windows dotnet host (`/mnt/c/Program Files/dotnet/dotnet.exe`, quoted paths).