{"generatedAt":"2026-10-24T12:11:27.697Z","canonicalUrl":"https://agentbreakwatch.vercel.app/p/primer-mcp","llmsTxtUrl":"https://agentbreakwatch.vercel.app/p/primer-mcp/llms.txt","categoryHub":{"slug":"design-ui","title":"Design, Figma, Storybook & UI Component MCP Servers","url":"https://agentbreakwatch.vercel.app/c/design-ui"},"tldrVerdict":"Primer MCP (@primer/mcp) is currently at v1.1.2 on NPM (published 2026-10-23), with a 90-day Stability Score of 82/100 (B+) and MEDIUM schema drift risk. recent release v1.1.2 (up from v1.1.1) updates Design & UI MCP tool schemas and transport handling (13 releases in last 90d). Pin exact version v1.1.2 in .mcp.json to avoid silent parameter drift.","package":{"slug":"primer-mcp","packageName":"@primer/mcp","registry":"npm","kind":"mcp","subcategory":"Design & UI MCP","displayName":"Primer MCP","vendor":"Primer","githubRepo":"primer/react","breakingSummary":"recent release v1.1.2 (up from v1.1.1) updates Design & UI MCP tool schemas and transport handling (13 releases in last 90d). Pin exact version v1.1.2 in .mcp.json to avoid silent parameter drift.","schemaDriftRisk":"medium","affectedSymbols":["mcp","tools/list","tools/call"],"migrationBefore":"\"primer-mcp\": {\n  \"command\": \"npx\",\n  \"args\": [\"-y\", \"@primer/mcp@latest\"]\n}","migrationAfter":"\"primer-mcp\": {\n  \"command\": \"npx\",\n  \"args\": [\"-y\", \"@primer/mcp@1.1.2\"]\n}","description":"An MCP server that connects AI tools to the Primer Design System","latestVersion":"1.1.2","latestPublishedAt":"2026-10-23T15:50:14.824Z","recentVersions":[{"version":"1.1.2","publishedAt":"2026-10-23T15:50:14.824Z"},{"version":"1.1.1","publishedAt":"2026-10-16T17:11:51.207Z"},{"version":"1.1.0","publishedAt":"2026-09-03T16:31:54.279Z"},{"version":"0.0.0-20260831205533","publishedAt":"2026-08-31T20:55:48.854Z"},{"version":"0.0.0-20260814130501","publishedAt":"2026-08-14T13:05:09.160Z"},{"version":"0.0.0-20260805190128","publishedAt":"2026-08-05T19:01:37.219Z"}],"releasesLast90d":13,"dependenciesCount":8,"license":"MIT","registryUrl":"https://www.npmjs.com/package/@primer/mcp","githubUrl":"https://github.com/primer/react","installCommand":"npx -y @primer/mcp@1.1.2","stabilityScore":82,"stabilityGrade":"B+"}}