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onsystem

onsystem

Keep coding agents on your design system

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onsystem checks agent-written React against your real components and tokens: palette colors, native elements and APIs your design system lacks, at every edit and pull request, with the fix. MCP server, Claude Code plugin, ESLint plugin and GitHub Action. MIT.

onsystem makers

Here are the founders, developers, designers and product people who worked on onsystem

Diogo EstevesStaff Full-Stack AI Engineer
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