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ft-hands tracks with the mono IR cameras in dim light and with every camera (or the colour pair, HANDS_BRIGHT) in bright light, going by the colour frames' mean brightness with hysteresis and a 2 s hold (HANDS_CAMERAS=auto, the default; mono, color and all fix it). Colour frames are placed on the mono cameras' clock by their dequeue time, and a view in a camera a step lacks waits for that camera's next frame. A grip (a closed hand) is a second gesture next to the pinch, in version 2 of the gestures file: every fingertip curled toward the wrist, beginning only on a hand seen open within a second and held up in front. On the 2026-09-30 lit recording that leaves 6 false grips of 14, all with the hands on the desk; pinch counts are unchanged. ft-handreplay logs grips and finger curl, watch_gestures.py shows them, and tools/cut_sets.py copies a few sets out of a recording. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>