Function probeDaemonIdentity

src/mcp/daemon-paths.ts:110–152

(info: DaemonLockInfo, timeoutMs = 1_000)

 * after an OOM/SIGKILL (#1553).
 */
export function probeDaemonIdentity(info: DaemonLockInfo, timeoutMs = 1_000): Promise<boolean> {
  if (!Number.isInteger(info.pid) || info.pid <= 0 || !info.socketPath) return Promise.resolve(false);
  return new Promise<boolean>((resolve) => {
    let socket: net.Socket;
    let buffer = '';
    let done = false;
    const finish = (ok: boolean) => {
      if (done) return;
      done = true;
      clearTimeout(timer);
      socket.destroy();
      resolve(ok);
    };
    const timer = setTimeout(() => finish(false), timeoutMs);
    timer.unref?.();
    try {
      socket = net.createConnection(info.socketPath);
    } catch {
      clearTimeout(timer);
      resolve(false);
      return;
    }
    socket.setEncoding('utf8');
    socket.on('data', (chunk) => {
      buffer += String(chunk);
      if (buffer.length > 4096) return finish(false);
      const newline = buffer.indexOf('\n');
      if (newline < 0) return;
      try {
        const hello = JSON.parse(buffer.slice(0, newline)) as Record<string, unknown>;
        finish(
          hello.protocol === 1 &&
          hello.pid === info.pid &&
          (info.version === 'unknown' || hello.codegraph === info.version)
        );
      } catch {
        finish(false);
      }
    });
    socket.on('error', () => finish(false));
    socket.on('close', () => finish(false));
  });
}

/**
 * Serialize a {@link DaemonLockInfo} for writing to the pidfile. JSON for