Southleft Design Systems MCP
Knowledge MCP exposing 188+ design system reference entries to AI agents: DTCG (W3C Design Tokens), WCAG 2.2, Material Design, Shopify Polaris, IBM Carbon, Atlassian Design System. Plug it into Claude Code / Cursor / Windsurf and the agent answers DS questions with real canonical sources instead of hallucinating.
Strengths
- 188+ maintained entries covering DTCG, WCAG 2.2, Material, Polaris, Carbon, solid reference base
- Open-source MIT, self-host possible, no vendor lock-in, no recurring cost
- Reduces DS hallucination from Claude Code / Cursor without writing a 5,000-line CLAUDE.md
Limitations
- Public coverage only, your internal DS is not there, you need to complement with a custom MCP (Storybook MCP, manifest)
- Maintenance depends on the open-source repo, future WCAG 3 or DTCG entries may take time to land
Best for
- Teams consuming AI on public DS (Polaris, Carbon, Material) and wanting to avoid spec fabrications
- DS managers benchmarking their internal DS against canonical references before each release