Google’s Stitch introduces <a href="https://stitch.withgoogle.com/docs/design-md/overview" target="_blank" rel="noopener nofollow">DESIGN.md</a>, 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, <a href="https://stitch.withgoogle.com/docs/design-md/overview" target="_blank" rel="noopener nofollow">DESIGN.md</a> aims to become a universal “design contract” across tools, reducing friction, improving consistency, and potentially reshaping how designers and developers collaborate.

Anubhav Bhatt

Google's Stitch has introduced DESIGN.md, an open-source file format designed to standardize how UI design systems are shared with AI tools. It combines machine-readable design tokens (colors, typography, spacing) with human-readable context explaining design intent, enabling AI to generate consistent, brand-aligned interfaces without repeated manual explanation. The format includes validation tools like accessibility checks and integrates with workflows such as Tailwind and CI pipelines, aiming to become a universal design contract that reduces friction and improves designer-developer collaboration.

DESIGN.md - UI design systems format shared with AI

Love the idea! Hopefully it doesn’t join <a href="http://AGENTS.md" target="_blank" rel="noopener nofollow">AGENTS.md</a> and <a href="http://CLAUDE.md" target="_blank" rel="noopener nofollow">CLAUDE.md</a> in the “almost a standard” pile.

I somehow missed the link to the source.
This might be it: <a href="https://stitch.withgoogle.com/docs/design-md/overview" target="_blank" rel="noopener nofollow">https://stitch.withgoogle.com/docs/design-md/overview</a>