React Native Expo MCP

Instructions

Implementation Reference

• src/content/patterns/screen-architecture.ts:175-177 (handler)

  The handler function `getScreenArchitecture` that processes the pattern retrieval, using `resolvePattern` helper.

  export const getScreenArchitecture = (topic?: string, compact?: boolean): string =>
    resolvePattern(pattern, topic, compact);

• src/index.ts:54-72 (registration)

  The registration of the `get-screen-architecture` MCP tool in the server instance.

  server.tool(
    "get-screen-architecture",
    "Get screen architecture patterns (Logic/UI separation). Call this when creating a new screen or route. Covers the Route file + ScreenUI file split, naming conventions, and why it matters for testability and SOLID principles. Use `topic` to get a specific section only.",
    {
      topic: z
        .string()
        .optional()
        .describe(
          "Get a specific section only. Available: core-rule, route-file, screen-ui, rules, benefits. Omit for full content."
        ),
      compact: z
        .boolean()
        .optional()
        .describe("If true, returns rules only without code examples. Much shorter."),
    },
    async ({ topic, compact }) => ({
      content: [{ type: "text", text: getScreenArchitecture(topic, compact) }],
    })
  );