What problem does it solve? UI code often drifts into hard-coded spacing, colors, and raw platform components, producing inconsistent styling across screens. This Skill enforces a design-token-first approach and a shared core component library so every screen follows the same design system. ## Core Features & Use Cases - Design Token Enforcement: Provides spacing, color, and typography token tables (e.g., $4, $textPrimary, $lg) and flags hard-coded values as mistakes. - Core Component Reference: Documents Box, HStack/VStack, Text, Button, Input, and Card with prop patterns and variants. - Layout Patterns: Supplies ready-made screen, form, and list-item layout templates using core components. - Use Case: When building a new profile screen, the agent composes it from Screen, VStack, Input, and Button components with token-based props instead of raw View elements and inline styles. ## Quick Start Ask the agent to build a settings screen using the core component library with design tokens for all spacing and colors.