Every contributor and AI agent opening a PR that changes UI starts the description with "Requires UI/UX UAT approval from the maintainer" and lists the screens and flows to review. The PR is not merged until the maintainer approves. Added to AGENTS.md (full rule), CLAUDE.md (Claude Code reads only that file), the archipelago-design skill and the PR template. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>