What problem does it solve? Projects without a documented design system accumulate inconsistent spacing, colors, and component patterns, leaving downstream design audits with nothing to enforce against. This Skill produces an explicit design system contract at docs/DESIGN_SYSTEM.md. ## Core Features & Use Cases - Derive Mode: Extracts spacing scales, color palettes, typography, and component patterns from existing codebases (Tailwind configs, CSS variables, theme files) using grep-based surveys. - Propose Mode: Generates a complete design system from scratch for greenfield projects, including aesthetic direction, spacing scale, semantic colors, and typography. - Consistency Notes: Documents where the codebase disagrees with the system, surfacing candidates for design-audit and design-fix work. - Use Case: After a redesign introduces divergent patterns, run this Skill to document the majority patterns as the system and flag deviations for convergence work. ## Quick Start Analyze this codebase and create a design system contract at docs/DESIGN_SYSTEM.md documenting the existing spacing, color, and typography patterns. Note: this Skill is deprecated; prefer the current ui-* reference skills and design-expert/design-* model unless the legacy docs/DESIGN_SYSTEM.md workflow is explicitly requested.