Interview the user to build an app's front-end design system, then write docs/foundation/DESIGN.md — a prescriptive, stack-adaptive token + component reference that coding agents load alongside every UI build to stay on-brand and avoid generic "AI slop" — plus a generated DESIGN.html visual preview.
Interview the user to build an app's front-end design system, then write docs/foundation/DESIGN.md — a prescriptive, stack-adaptive token + component reference that coding agents load alongside every UI build to stay on-brand and avoid generic "AI slop" — plus a generated DESIGN.html visual preview. Use when the user types /ask-about-design, "set up the design system", "how should the UI look", "d