What problem does it solve? Designing a UI component to a consistent quality bar requires covering anatomy, variants, sizes, all 8 interaction states, design token mapping, and WCAG accessibility — a process that is easy to get wrong or leave incomplete when done ad hoc. ## Core Features & Use Cases - Complete Component Specs: Produces specifications with anatomy diagrams, variant and size tables, all 8 applicable states (default, hover, focus, active, disabled, loading, error, selected), token mapping, and ARIA/keyboard/screen-reader guidance. - Verification Gates: Builds a states harness and runs contrast, axe accessibility, text-measurement, focus-trap, and responsive-overflow scripts, plus Playwright screenshot inspection in light and dark modes. - House Patterns: Enforces tokenized motion, lucide icon sprites, mobile-first responsive layout, and verified custom checkbox/radio patterns for visual consistency. - Use Case: Ask for a spec for a new combobox or toast component and receive a full spec document plus a tested HTML states harness that passes every accessibility and contrast gate. ## Quick Start Design a spec for a modal dialog component including all states, token mapping, and accessibility requirements.