What problem does it solve? Teams need a single, machine-readable source of truth for visual identity that coding agents can consume. This Skill helps you author Google's DESIGN.md spec files, validate them for structural errors and WCAG contrast issues, and export tokens to Tailwind or W3C DTCG JSON. ## Core Features & Use Cases - Authoring: Generate a complete DESIGN.md with YAML token frontmatter (colors, typography, rounded, spacing, components) plus canonical Markdown sections in the enforced order. - Lint & Diff: Run npx @google/design.md lint to catch broken token references, duplicate sections, invalid colors/dimensions, and WCAG AA/AAA contrast failures; diff two versions to detect regressions. - Export: Convert the spec to Tailwind theme JSON or W3C DTCG tokens.json for use in existing projects. - Use Case: A user pastes their brand palette and asks for a design system. You write DESIGN.md using token references like {colors.primary}, lint it, fix a contrast warning on button-primary, and export tailwind.theme.json next to it. ## Quick Start Ask the agent to create a DESIGN.md design token file for your brand with a primary color and typography, then lint it and export Tailwind theme JSON.