What problem does it solve? AI-generated interfaces often look generic, ignore accessibility requirements, and break on different screen sizes. This Skill guides the construction of production-quality user interfaces that follow a real design system, meet WCAG 2.1 AA accessibility standards, and handle loading, error, and empty states properly. ## Core Features & Use Cases - Component Architecture: Enforces composition over configuration, colocated file structures, and separation of data fetching from presentation in React/TypeScript components. - Accessibility Compliance: Provides concrete patterns for keyboard navigation, ARIA labels, focus management, and screen reader support, backed by a detailed WCAG checklist reference. - Design System Adherence: Avoids the recognizable "AI aesthetic" (purple gradients, excessive rounding, stock card grids) by enforcing consistent spacing scales, typography hierarchy, and semantic color tokens. - Use Case: When asked to build a task management page, the Skill produces a responsive grid layout with skeleton loading states, optimistic updates via React Query, keyboard-accessible controls, and meaningful empty states. ## Quick Start Ask the agent to build an accessible, responsive task list component with loading and empty states that follows the project design system.