What it does
This MCP server provides Claude with access to GitHub's Primer Design System, the React component library and design tokens that power GitHub's interfaces. Operating without discrete tools, it enables filesystem and network access to Primer resources—allowing Claude to read component definitions, design guidelines, and specifications during development. This is useful when you want Claude to understand and apply Primer's constraints and token definitions in conversations about component architecture or code generation.
Who it's for
Teams building with the Primer Design System who want Claude's assistance with component selection, design alignment checks, and Primer-compliant code generation, especially in engineering workflows where design-system consistency is enforced.
Common use cases
- Reference Primer component APIs and prop signatures during code review
- Ask Claude to generate or review React components for Primer compliance
- Validate design token usage and theming decisions against Primer specifications
- Query design system documentation and accessibility requirements
Setup pitfalls
- One secret was detected in the codebase during scanning. Store credentials in environment variables, not version control.
- The server has read and write filesystem access. In multi-user environments, restrict its access to prevent unintended file changes.
- The Primer Design System documentation and token definitions may drift from your local installation. Verify your design-system version is current before relying on Claude's recommendations for critical decisions.