Expo iOS Development MCP Server

Instructions

Implementation Reference

• src/simulator/logs.ts:78-91 (handler)

  Core implementation of stopLogStream(): kills the log stream process (execa 'xcrun simctl spawn booted log stream') if running, updates state variables.

  export async function stopLogStream(): Promise<void> {
    logger.info("simulator", "Stopping simulator log stream");
  
    if (!logStreamProcess) {
      logger.info("simulator", "No log stream is running");
      return;
    }
  
    logStreamProcess.kill("SIGTERM");
    logStreamProcess = null;
    isStreaming = false;
  
    logger.info("simulator", "Simulator log stream stopped");
  }

• src/mcp/server.ts:251-270 (registration)

  MCP tool registration for 'simulator.log_stream.stop': thin wrapper around stopLogStream() with MCP response formatting and error handling.

  server.tool(
    "simulator.log_stream.stop",
    "Stop streaming simulator system logs",
    {},
    async () => {
      try {
        await stopLogStream();
        return {
          content: [
            {
              type: "text",
              text: JSON.stringify({ success: true, message: "Log stream stopped" }),
            },
          ],
        };
      } catch (error) {
        return handleToolError(error);
      }
    }
  );