Phase 2 (Development) of product-playbook — design the product's UI BEFORE building screens. Turns "I don't know what it should look like" into agreed design principles + a confirmed sample page + a concrete, archetype-correct DESIGN.md (shadcn-compatible tokens) that every later build step reuses.
Phase 2 (Development) of product-playbook — design the product's UI BEFORE building screens. Turns "I don't know what it should look like" into agreed design principles + a confirmed sample page + a concrete, archetype-correct DESIGN.md (shadcn-compatible tokens) that every later build step reuses. Use after /structure when the product has a user-facing UI, or run /design-system "design the UI", "