motion-verify

# Motion verification from a recording Screenshots prove only that an animation reaches sampled states. Jank and frozen frames hide between them. Record the real macOS display, extract uniform frames, inspect a phase strip, then measure adjacent-frame change. This method found the spotlight ring's speed and braided-orbit defects in 2026-07-23. Run whenever `pnpm design:route` includes `motion-verify`. This is the completion proof for temporal output, not an optional craft review. ## Preconditions - The surface is visible on a real monitor. Headless sequential screenshots may diagnose a defect but cannot approve motion; if recording is unavailable, report the proof as deferred. - Resolve available `ffmpeg` and `ffprobe` executables; the Homebrew path is an example, not a requirement. Report missing instrumentation before recording. - Put recordings and frames in an external session scratch directory. - Capture the same app/window/state through the computer-use capability so the accessibility owner and screenshot bind the recording to the reviewed surface. ## 1. Prepare a deterministic state Set the exact URL, zoom, and state. The map sleeps while idle, so confirm the motion keeps it awake and disable simulated reduced motion unless that is the subject. Add `?guides=off`. A first-run overlay contaminates the opening frames; closing it by hand adds its own animation and focus change. Use `?guides=reset` only when the guide itself is under test. ## 2. Record and e...