mcp-transport-close-life-stdioclienttransport-close-returns-immediately-wit-901acb3c

THEN Modify close() to await the child process exit. Wrap the process's 'close' event in a Promise and resolve it after the process exits. Ensure the returned Promise only resolves once the process has fully terminated.

close(): Promise<void> {
  return new Promise((resolve) => {
    this._process.once('close', resolve);
    this._process.kill();
  });
}