# HANDOFF — 2026-10-10 (scene-order F-key fix + desktop-lock fix; both LOCAL, uncommitted)

## At a glance
- **Branch** main (no feature branch). Pushed through `5685c5d`; 18 commits local, **not pushed**
  (push at the creator's call).
- Desktop-lock fix committed as `63bf844`; **scene-order fix below is uncommitted**.

## Branch
- main (no feature branch). Pushed through `5685c5d` (TRAX toggle); everything after is local,
  **not pushed** (push at the creator's call).

## New work unit (this handoff) — READY TO VERIFY, do not commit yet
- **Fix** for the scene-strip / F-key ordering report — `ViewModels/MainViewModel.Scenes.cs` new
  `ReorderScenesToCanonical()` (canonical F1-F5 order at load, renamed scenes after; next save
  re-stamps SortOrder) called from `MainViewModel.cs:LoadLayout`; `ytLive.Tests/SceneOrderTests.cs`
  (new, seeds a Chat-before-BRB DB and asserts order + F1-F5 labels + persisted SortOrder).
  See `bugs.md` entry 2026-10-10. Scope-locked files: `ViewModels/MainViewModel.Scenes.cs`,
  `ViewModels/MainViewModel.cs` (1 call line), `ytLive.Tests/SceneOrderTests.cs`, `bugs.md`,
  `HANDOFF.md`.
- Full suite **423 passed / 0 failed / 0 warnings**. Root cause was the creator's own DB (Chat
  SortOrder 2, BRB 3); the fix heals it on next launch regardless of DB history.
- **To commit later (this unit only):** the files listed above. Then the working tree is back to
  just the creator's pinned-chat unit (NOT mine to commit).

## Desktop-lock unit (COMMITTED 63bf844 — desktop "lock" fix)
- `ShowActivated = !FullscreenGameRunningNow` + `FullScreenDetectorOverride` seam + `DesktopLockTests`
  (3 tests). Committed 2026-10-10. Creator still to verify in-game (launch while an
  exclusive-fullscreen game owns the foreground — the game must stay live).

## Dirty files — current reality (2026-10-10)
- **NOT mine — do NOT commit:** the creator's in-flight "pinned chat" unit (`Models/YouTube.cs`,
  `ViewModels/MainViewModel.Chat.cs`, untracked `Helpers/RelayCommandGeneric.cs`, and **its hunks in
  `Controls/LeftPanel.xaml`**), plus the creator's untracked `Assets/llamacasty*` art.
- ⚠️ Pre-commit (scene-order unit): `scripts/verify.sh` runs `scripts/scope-check.sh` against ALL
  working-tree changes — the not-mine pinned-chat + art files WILL flag. Pass them as declared-known.

## What just happened — TASK 51 quality pass (committed 2026-10-09)
1. **Jitter fix (`3057069`) — `MaskSmoother`**: per-session blend 0.75×new + 0.25×previous at the
   ONE worker (`CameraManager.RunEffectWorker` → `session.Smoother.Smooth(TrySegment(source))`).
   State on `CameraSession`, NOT the segmenter (shared app-wide, contract-pinned to raw output). Null
   resets history; first frame passes through; never aliases caller's array; ping-pong buffers (no
   per-frame LOH alloc). Weights: OBS obs-backgroundremoval 0.85 default, Jitsi 0.7/0.3 best
   (0.5/0.5 smears). Test `Temporal_Smoothing_Damps_Segmentation_Jitter_Across_Frames`: x=6 → first
   255 / smoothed 58 / raw-unsmoothed 0. ⚠️ Gotcha: worker guards a re-queued identical frame
   reference — pump frame2 as a NEW instance.
2. **Blur "heavy" fix (this commit) — quadratic radius**: `BlurRadius(strength)` = 1 + 5·s²,
   `MaxBlurRadius` 12→6 small px (≈ 24 full px max). Default 0.5 = 2 small px (was 6 under the old
   linear curve) — ~3× lighter spread. Rationale: StreamFX defaults Box blur Size to 5, author stops
   downscaled blurs ~8px. Test `Blur_default_strength_is_gentle_and_full_strength_is_strong` pins the
   mapping and step-edge behaviour (reach 9px default vs 26px max). Point-source probes vanish below
   the 0.5 rounding (3 box passes dilute a spike) — use a step edge, not a spike, to measure blur.

## Next step
- Creator launches the app: the scene strip must show Starting/Live/BRB/Chat/Ending in order with
  F1-F5 correct (the creator's DB had Chat before BRB; the load-time reorder heals it and the next
  save re-stamps SortOrder). Also still to verify when convenient: the desktop-lock fix while an
  exclusive-fullscreen game owns the foreground. Then I can commit the scene-order unit.

## Tests
- Full suite **423 passed / 0 failed / 0 skipped / 0 warnings** (2026-10-10; includes the new
  `SceneOrderTests`). Known env flakes remain `Mix_HonorsProviderGains…` (fails while system audio
  plays) and `RealMouseDrag…` (needs an idle desktop).

## Also still open
- **Vertical-format regression (STALE, not fixed):** 1080p60 vertical selection no longer shrinks the
  capture border in the preview. Mechanism mapped (see prior summary): the crop Rectangle
  `Controls/PreviewPane.xaml:319-322` bound to `OutputRectX/Y/W/H` + `IsOutputCropped`, driven by
  `MainViewModel.Streaming.cs` `ApplyStreamQuality` from `SelectedQuality` (binding + ctor only,
  `new("Vertical 1080p60", 60, 8.0, 1080, 1920)`), `DimRects` in `MainViewModel.cs:91-94`. Root cause
  unknown — paused.
- **Vertical recording file closed:** the recording itself is 1080×1920 60fps correctly; the
  "whitespace" was the app's preview UI, not the file. Audio loudness (`ebur128`) for the private video
  was never run and the thread is closed unless the user reopens it.
- Blur-heaviness = fixed (above). Yellow-border regression = stale thread.
- ⛔ Sudo password rotation pending (user; then update both password lines in `CREDENTIALS.md`).
- TASK 56 secret scan before `gramps/LlamaCasty` goes public. TASK 55 disk hygiene queued.