demo-video

On-demand guided-tour walkthrough video of a built feature — the last skill in the v2 workflow. Drives an existing Playwright / frontend setup through the primary flow slowly with pauses, records video, and derives timed subtitles from as-built.md and test-step timing; optional background music. Never bootstraps Playwright and never claims success from "a video exists" alone. Without ffmpeg it still ships Playwright's native video plus a sidecar subtitle file; it degrades to ordered screenshots only when no video can be recorded at all. Narration audio is out of scope — it writes subtitles, not speech. Use when the user invokes /demo-video, or says "make a demo video", "record a walkthrough", "generate a guided tour of the feature".