design-md

When the user wants to create, adopt, extract, or lint a DESIGN.md for a project — a plain-markdown design system that AI coding agents read to keep UI visually consistent. Trigger on: 'design system,' 'DESIGN.md,' 'visual consistency,' 'brand the UI,' 'styling guide,' 'agent keeps changing the colors,' 'adopt a brand look.' Sits next to CLAUDE.md / AGENTS.md in a project root and prevents the three failure modes of agent-built UI: bootstrap default, color roulette, and style drift.