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Open Design System Bench
Open-source harness that runs coding agents against a React design system and grades component use, API fidelity, tokens, accessibility, and compilation. Compares results across models and context levels.
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@shadcn/lint
newAgent-focused linter for Tailwind v4 design systems. Enforces component, token, color, and class rules through ESLint or Oxlint, with fix guidance drawn from the project's own components and theme.

Airship
Open-source visual editor that wraps a running web app in a Figma-like canvas, maps selected elements to source files, and lets Codex, Claude Code, or OpenCode apply reviewable edits.
Better Design
Design MCP server and shadcn/ui registry that gives coding agents design tokens, UI principles, component code, icon direction, and accessibility review rules.
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Linear-inspired project management UI
