React Native Upgrader MCP

Instructions

Implementation Reference

• src/tools.ts:54-59 (handler)

  The tool handler function that calls getStableVersion helper and formats the response as MCP tool output.

  async () => {
      const version = await getStableVersion();
      return {
          content: [{ type: "text", text: version }]
      }
  }

• src/tools.ts:36-60 (registration)

  Registration of the 'get-stable-version' tool including title, description, and handler function.

      server.registerTool('get-stable-version',
          {
              title: "Get Stable Version",
              description: `Gets the latest stable version of React Native from GitHub releases.
  
  OVERVIEW:
  This version represents the most recent production-ready release that has been thoroughly tested 
  and is recommended for use in applications.
  
  VERSION FORMAT:
  • The version number follows semantic versioning (e.g. 0.72.0)
  • Excludes any release candidates or beta versions
  
  USAGE:
  • This tool is commonly used before planning an upgrade to ensure targeting the latest stable release
  • Must be called before calling get-react-native-diff tool
  • The output of this tool will be used as the toVersion parameter in the get-react-native-diff tool`,
          },
          async () => {
              const version = await getStableVersion();
              return {
                  content: [{ type: "text", text: version }]
              }
          }
      );

• src/services.ts:5-9 (helper)

  Core helper function implementing the logic to fetch the latest stable React Native version from GitHub API by getting the latest release tag and stripping the 'v' prefix.

  export const getStableVersion = async () => {
      const response = await fetch(`https://api.github.com/repos/facebook/react-native/releases/latest`);
      const data = await response.json() as { tag_name: string };
      return data.tag_name.replace('v', '');
  }