Making a 30-second app promo in code with Claude Code and Remotion

A case study of a 30-second promo: a nine-step Claude Code skill with seven approval gates, a brief that checks every claim against the app's code, audio first on a beat-based timeline, real app components instead of mockups, seven AI-critic rounds and a phone check. Covers three bugs worth knowing; the author reports about 14 hours.

Disclosure Maker's own products: the promo is for the author's app, Habitmon, and the skill and critic are in his MIT-licensed claude-video-studio repo.