Google has released DESIGN.md, an open-source file format that encodes design tokens, accessibility rules, and system details so any AI can understand and apply your design system out of the box. It validates decisions against WCAG and lets you import and export rules across projects and platforms, directly challenging Anthropic’s closed Claude Design limits.

The author argues that Claude Design is just a repackaged version of existing Claude Code capabilities, offering template-based prototypes and presentations rather than truly skilled design. It may lower the bar for non-designers but won’t deliver quality beyond what current AI tools already produce and won’t replace professional designers.

Impeccable provides a suite of 18 AI commands that teach design best practices and steer code generation with shared vocabularies. It includes a detection engine, CLI tool, and Chrome extension to spot and fix design anti-patterns like low contrast, nested cards, and gradient text across live sites or codebases.