# HANDOFF — Session State

## Branch / Commit State

**`main`**, working tree is **CLEAN**. `origin/main` == `85893ea` (pushed).

**Pushed** (reached `origin/main` == `85893ea`, incl. tags): Phase 1 commit `0` +
refactor commits `1..11` + **Phase 2 commits `12..18`** + the `Controls/index.md`
docs commit `cb54637` + **Phase 3 splits A–E** (tags `refactor-commit-A..E`) +
**Commit F (Recording, `refactor-commit-F`)** + **Commit G (ChatOverlayLayer,
`refactor-commit-G`)**. Everything is pushed; nothing local-only.

**Commit log (all pushed):**

| Commit | Hash | Tag | Payload |
|--------|------|-----|---------|
| docs | `cb54637` | — | `Controls/index.md` |
| A | `6944db8` | `refactor-commit-A` | split `MainViewModel.cs` core → **495** |
| B | `31362d1` | `refactor-commit-B` | split `MainViewModel.Streaming.cs` → **330** |
| C | `fab2e09` | `refactor-commit-C` | split `MainViewModel.Background.cs` → **418** |
| D | `d3271a0` | `refactor-commit-D` | trim `SocialsDialogViewModel.cs` → **334** |
| E | `dcb3637` | `refactor-commit-E` | split `LayoutStore.cs` → 6 partials |
| F | `3107f92` | `refactor-commit-F` | extract recording concern → `MainViewModel.Recording.cs` |
| G | `85893ea` | `refactor-commit-G` | **first true decomposition** → `Services/ChatOverlayLayer.cs` |

## What's In Flight

Nothing code-in-flight — working tree clean.

**The directive (2026-08-31, user):** rewrite the project, breaking files into
**functional components to compliment AI retrieval/processing** — NOT line-count
chasing. Line count is a guideline for context management, not a design goal.

**What was done:**
- **Phase 3 (A–E):** every production `.cs` ≤ 500, grouped by concern. These are
  *partial shuffles* — same class, same shared state. Marginal for retrieval.
- **Commit F:** recording-output concern → `MainViewModel.Recording.cs` (partial).
- **Commit G — the real win:** `Services/ChatOverlayLayer.cs` is a genuine
  owner-state component (buffer + renderer + timers + preview + live `RenderFrame`);
  `MainViewModel.Chat.cs` 194 → 44 (thin binding facade). First true decomposition.

**Expert diagnostic (recorded in `ai.md` → Key patterns):** the remaining partials
(Audio, Webcam, Background, Scenes, Socials…) are **binding glue over already-
extracted services** (`AudioMixer`, `CameraManager`, `ScreenCaptureManager`,
`ChatBoxRenderer`, `SocialValidator`). They have no cohesive owner-state blob to
peel — forcing extraction adds coupling. **Chat was the one clean peel.**

**Next (recommended):** the one remaining *genuine* big decomposition is the
**scene-graph segment** (the `Scenes`/`StagedScene`/element-inventory backbone
every feature hangs off). This is a real architectural redesign — a `SceneGraph`
owner-object with narrow seams — that touches the binding surface and needs
design review, NOT an unsupervised autonomous peel. Do not attempt it blind pre-1.0.

**Pending bus:** `ViewModels/index.md` Phase 3 tracker has rows A–E (closed);
Phase 3 marked COMPLETE. Watch-list (under limit, no action): `Controls/PreviewPane.xaml.cs`
(464), `ViewModels/MainViewModel.Audio.cs` (408).

## Landmines

- **Pre-existing test failures (do not chase):**
  `AudioPipelineTests.Mix_HonorsProviderGains_AndGameMute_KillsTheLoopback` +
  `RoundClipInteractionTests.Round_Clip_Corner_Is_Grabbable_And_Shape_Is_Circle`.
- **Tests occasionally abort early (236/237)** — known flake, accepted by `verify.sh`.
- **App running locks `ytLive.exe`** → build fails MSB3027. Kill PID before building.
- **WinForm crash from `Window_PreviewMouseLeftButtonDown`** — handled in-side the
  preview/left panel; don't add handlers that deref `OriginalSource` unguarded.
- **Controls cannot see `Window.Resources`** (converter rule, Commit 13): any
  StaticResource the window once supplied must live at app level in
  `Themes/Controls.xaml`. The 7 converters were promoted there.
- **Some control XAML needs its own `xmlns:models` / `xmlns:Helpers`** — a moved
  block lost its namespace when it left MainWindow's root (LeftPanel hit this,
  MC2000 "key null"). Always add the model/helper xmlns on each control root.
- **Name-looked-up host stubs must stay in the window:** `WebViewHostPanel`
  (ctor `InitWebView2(WebViewHostPanel)`) and `ToastArea`
  (`NotificationService.InArea("ToastArea")`) are resolved by name from the
  window — keep them as window-root children, don't bury them in a control.
  OverlayHost deliberately left them in place (Commit 18) for this reason.
- **Pre-commit gate:** `scripts/verify.sh` (0-warning build + full tests) and
  `scripts/scope-check.sh "file1" …` — scope-check REQUIRES explicit file args.
- Build from WSL with the Windows dotnet host only (see `AGENTS.md`).

## Todo state

- MainViewModel refactor: **Phase 1 complete (11/11 partials)**, pushed.
- MainWindow.xaml refactor: **Phase 2 complete (6/6 controls)**, pushed at `1f4624c`.
- 500-line compliance: **Phase 3 complete (A–E, all ≤500)**, pushed.
- **True decomposition: Commit G — `Services/ChatOverlayLayer.cs` shipped + pushed** (first owner-state component; pattern recorded in `ai.md`).
- **Next (design-needed, do NOT blind-peel):** the scene-graph segment (`SceneGraph` owner-object) — the one remaining genuine big decomposition; touches binding surface, needs review.
- TASK 3: 27/30 (preview compositor 16, text source 17, alerts 20 still open).
- TASK 4: ✅ shipped. TASK 9: items 1–3 shipped; 4–7 open. TASK 10: steps 1–7; Velopack pending.
- TASK 18: shipped, creator verification pending. TASK 19/23, 20, 21-A: shipped.
- TASK 22 (audio sync offset): not started — required for v1.

## Session summary (2026-08-31)

- Ran the **500-line Phase 3 split to completion** (A–E), then the continuation.
- **Re-structuring principle (user correction, 2026-08-31):** split by
  **functionality**, so an AI can process one concern per file; the 500-line
  count is a **ceiling**, NOT the target. Do not pad or reshape code to a number.
- **Correction of a false premise:** my plan to "extract FFmpegEncoder /
  StreamHealthMonitor / FramePump" was a no-op — those already exist as
  `Services/Encoder/*`. The honest seams were (F) the recording concern and
  (G) the chat overlay.
- **Commit G = first TRUE decomposition:** `ChatOverlayLayer` owns chat state +
  behavior; `MainViewModel.Chat.cs` 194 → 44 thin facade. This is the pattern
  that actually compliments AI retrieval (one self-contained unit per feature),
  unlike the partial shuffles of A–E, which only marginalize context because
  every partial still shares the god-object's state.
- **Accident caught & recovered (Commit D):** a `> ViewModels/SocialsDialogViewModel.cs`
  write that truncated the file it was reading left it at 1 line; restored via
  `git checkout --`, re-ran from temp files. **Lesson** in `MyMistakes.md`: never
  `awk … > SRC` while awking SRC; stage cuts into temp files, then assemble.
- Everything through G is **pushed to `origin/main` (`85893ea`)** with tags A–G.