mcp-process-cleanup-calling-stdioclienttransport-close-returns-immedia-1d9254b6

THEN Modify close() to return a Promise that resolves only after the child process has fully exited. Listen for the 'close' event on the child process and reject or resolve accordingly. Ensure proper shutdown by awaiting process exit before resolving.

async close(): Promise<void> {
  return new Promise((resolve, reject) => {
    this._process.on('close', (code) => {
      if (code !== 0 && code !== null) {
        reject(new Error(`Process exited with code ${code}`));
      } else {
        resolve();
      }
    });
    this._process.kill();
  });
}