Live session outcomes: (1) pinch thresholds validated for inner
fingers frozen as defaults (ratio_on 0.50, margin 0.05, ext_min 1);
(2) panel frames + X/Y gauges now permanent (no early-return when
nothing is detected); (3) wxcvbn source-bundle shortcuts gated off by
default (VIZ_SOURCE_KEYS=1 re-enables) — a stray key mid-performance
switched the audio scene.
Add hand_facing() palm-spread metric (dist(kp5,kp17)/hand_size).
Gate GestureSlotStabilizer slot activation on facing >= HAND_FACE_MIN
(default 0.5) with 0.8x hysteresis; side-on palms no longer arm
pinch/strike. Add VizConfig.hand_face_min + HAND_FACE_MIN env var.
Update test fixtures: _near_hand() now spreads kp[5]/kp[17] so
existing tests keep passing through both near+face gates.
iphone-usb path: camera decode + ARKit conversion is cheap (no
MediaPipe inference on Mac). Frame-based gesture calibrations
(debounce/hold/grace/persist) assume 30 Hz. Keep 18 Hz for the
webcam MediaPipe path (M5 CPU protection).
Tests: period formula + MultiWorker.__init__ signature check.
Detection v3 review follow-ups: pin hand_persist_grace/near_off/
hold_frames defaults; use the module-level route_hands (restores the
monkeypatch seam, drops the dead local alias); document the grace
count-inheritance window in the gate docstring.
hand_slots module docstring still claimed inverted chirality (default
1) after the live A/B validated chirality correct (default 0); align
it. Pin the MESH_RIG ne0 bool convention (chantier 5 review minor).
61 tests: all VizConfig defaults, four bool conventions,
numeric cast fallback, monkeypatch round-trip, and Part B
gating (_ensure_model never called under --iphone-usb).
Fix hand_swap_lr from_env default: was True, now False.
L'électron rare