TASK 51 slice 4: camera-path hookup — CameraManager renders per-scene effect variants (one segmentation per raw frame on a latest-frame-drop worker, raw path untouched), VM declares/adopts variants per config; separable upsampling cuts Remove 46->3 ms, Blur 80->18 ms (Debug, 720p) (Unit: bg-effects hookup)

TASKS/task-51-webcam-bg-effects.md

@@ -85,7 +85,7 @@ delivery shape changed:
 ## 3. ☐ Test seam (Good Dog — one integration test per unit)
 
 - ✅ Model-runner interface seam (`IPersonSegmenter`) so tests inject a fake segmenter.
-- ☐ Assert the **processed frame reaches both consumers** (preview bitmap + compositor frame).
+- ✅ The **processed frame reaches both consumers** (preview bitmap + compositor frame), raw stays raw (`CameraManagerTests`, slice 4).
 - ✅ `None` = same-instance passthrough of the raw frame (`BackgroundEffectEngineTests`).
 - ✅ `Remove` = alpha 0 outside the person, RGB untouched, non-opaque (`BackgroundEffectEngineTests`);
   ✅ `Blur` = background smoothed, person pixel-identical (`BackgroundEffectEngineTests`).
@@ -96,14 +96,14 @@ delivery shape changed:
 - ☐ Engine failure → passthrough + single log, layer never dropped (code path exists; dedicated
   test lands with the hookup slice).
 - ☐ Real inference: **manual on the creator's box** (camera + lighting), not in CI.
-- ☐ **Perf check in the hookup slice:** time `Segment` + `Apply` per 720p frame on the creator's
-  box before wiring it into the 60fps path (expect a few ms; the mask can run at a lower rate
-  than the camera if needed).
+- ✅ **Perf, synthetic 720p (Debug):** segment 1.6 ms, Remove 3.3 ms, Blur 17.5 ms (after making the
+  upsampling separable — naive was 46/80 ms). Runs on its own worker, off the raw path.
+  ☐ **Real numbers on the creator's box:** `startup.log` → "background effects avg … ms/frame".
 
 ## 4. Sequencing
 
 - ✅ Separate work unit after the zoom build (zoom shipped 2026-10-08).
-- Slice order: 1 engine ✅ → 2 Blur ✅ → 3 config + persistence ✅ → 4 camera-path hookup (one
+- Slice order: 1 engine ✅ → 2 Blur ✅ → 3 config + persistence ✅ → 4 camera-path hookup ✅ (one
   processing point, both consumers) + perf check → 5 properties-panel UI.
 
 ## Related (not duplicated here)