Google Open-Sources DESIGN.md — Format Spec for Describing Visual Identity to Coding Agents

Google Labs / Hacker News (37pts)·medium signal

Google Labs published DESIGN.md, an open-source (Apache 2.0) format specification that gives coding agents a persistent understanding of a design system. Combines YAML front matter with machine-readable design tokens and markdown prose explaining rationale. Drop it in your project root and Claude Code, Cursor, Copilot will generate on-brand UI without repeated explanation. Born from Google Stitch, positioned as the 'README.md for design systems.' 37 points on HN.