DESIGN.md - UI design systems format shared with AI

Google’s Stitch introduces DESIGN.md, a new open-source format that could standardize how UI design systems are shared with AI.

Instead of repeatedly explaining design rules, teams can store them in a structured file combining machine-readable tokens (colors, typography, spacing) and human-readable context explaining intent.

This allows AI tools to generate consistent, brand-aligned interfaces automatically. The format also includes validation tools (like accessibility checks) and integrates with workflows such as Tailwind or CI pipelines.

Overall, DESIGN.md aims to become a universal “design contract” across tools, reducing friction, improving consistency, and potentially reshaping how designers and developers collaborate.