Move Coach

A Claude Code mod that adds a camera pane: your webcam feed with MediaPipe pose landmarks drawn in green, the matching Built to Move illustration beside it, and spoken coaching while you do the test.

• /move-coach [test] [camera#] opens the pane. With no test it's a plain camera preview. /move-coach stop ends a run.
• Tool mcp__move-coach__camera_test lets Claude run a test. The built-to-move-mobility-test skill uses it.
• Tests: sit_and_rise, couch, airport_scanner, shoulder_rotation, squat, solec, old_man.

Pieces

• helper/pose_coach.py: a uv script (mediapipe 0.10.14, opencv). It captures the camera, runs the Pose Landmarker (model cached in ~/.cache/move-coach), and runs one state machine per test. It speaks cues and streams JSON lines to the mod.
• hooks/register.tsx: the pane, the slash command and the tool. Ghostty draws the camera as a PNG Image; the Desktop app draws it as an Svg that embeds the JPEG frame with a vector skeleton on top.
• assets/book/: illustrations, optional. The book's illustrations are copyrighted and aren't shipped; put your own in ~/.config/move-coach/book/ (see assets/book/README.md). The pane works without them.

Voice

By default the coach speaks with the built-in macOS voice (say); nothing to set up. For a more natural voice, add an ElevenLabs API key in the plugin's settings (/config → move-coach → "ElevenLabs API key", stored in secure storage), and optionally a voice ID. The key reaches the helper in a private file it deletes on read, never on the command line. ~/.config/move-coach/keys.env with ELEVENLABS_API_KEY=... also works. If ElevenLabs fails for a cue, that cue falls back to say. Audio clips are cached in ~/.cache/move-coach/tts.

Requirements

macOS with a camera, uv (the helpers are uv scripts that install their own Python packages on first run), and the Xcode command-line tools (xcode-select --install, used once to build the small "Move Coach Camera" app). Optional: ffmpeg (camera names), a Muse headband and liblsl (brew install labstreaminglayer/tap/lsl) for EEG.

Camera permission

The Claude app starts its sessions with camera responsibility disclaimed, so a helper spawned straight from the mod can never get camera access (and macOS can't prompt for it). helper/launch.sh therefore builds a tiny Move Coach Camera.app (in ~/Library/Application Support/move-coach/, from helper/camera-app/) and runs the helper inside it with open, relaying its stdout through a FIFO. The first run shows the macOS camera prompt for "Move Coach Camera"; the grant then sticks across Claude updates. Revoke it in System Settings → Privacy & Security → Camera.

Optional: brain waves from a Muse headband

/move-coach eeg (or the pane's Connect Muse EEG button, or the tool's eeg_start action) runs helper/eeg_stream.py, which reads a Muse through muse-lsl. It attaches to an LSL EEG stream if one is already running (muselsl stream), and otherwise scans Bluetooth for a Muse and starts muselsl stream itself. /move-coach eeg Muse-1A2B picks a headband by name; /move-coach eeg stop ends it.

The pane draws the last 4 s of each channel (TP9, AF7, AF8, TP10), a contact dot per sensor, and relative band power over the last second. While a test runs, its result also carries the mean band power during the test (eeg_mean_relative_band_power).

The helper runs inside "Move Coach Camera.app", like the camera, so macOS asks once to allow Bluetooth. pylsl needs liblsl: if the wheel doesn't bundle it, brew install labstreaminglayer/tap/lsl.