Stage 7 of the Software Factory - the proof video. Turns a build's acceptance criteria into a narrated MP4 - Playwright drives the real app criterion by criterion while a voice explains what's being proven, plus one beat showing the rendered test results. "Watch your software pass its own exam" for people who won't read test output. Thin entry point over the auto-loom engine (requires the auto-loom skill as a sibling folder). Triggers - "proof video", "show me it works", "prove the build".
