Google just undercut Anthropic’s closed, pricey design tool by releasing DESIGN.md, an open-source standard anyone can use. While Claude Design locked down its AI-powered interface behind steep limits, Google published a single Markdown file you drop into any project. That file defines your brand colors, typography, spacing and component roles in plain language, so any AI—on any platform—knows exactly what each token means. Beyond naming values, DESIGN.md builds in automatic accessibility checks against WCAG rules. Instead of manually verifying contrast ratios or ARIA labels, your AI agent flags potential issues as it generates or updates components. You get instant feedback without digging through design specs or running separate audits. Portability is the final piece. You export your DESIGN.md from one repo and import it elsewhere—no lock-in, no conversions. Whether you’re on GitHub, in Figma plugins or running Anthropic’s tools, the rules stay consistent. Google’s repo lives at github.com/google-labs-code/design.md, ready for anyone to clone and adapt. Anthropic bet on walled gardens and high price tags. Google tore down the walls with one file. By open-sourcing a universal design standard, it hands every team the keys to seamless, accessible AI-driven interfaces.