// Streaming lifecycle helper
export function withStreamingLifecycle(
  setup: () => Promise<void>,
  teardown: () => Promise<void>,
) {
  let isCleaningUp = false;
  const cleanup = async () => {
    if (isCleaningUp) return;
    isCleaningUp = true;
    try {
      await teardown();
    } finally {
      process.exit(0);
    }
  };
  process.once('SIGINT', cleanup);
  process.once('SIGTERM', cleanup);
  return (async () => {
    await setup();
    await new Promise(() => {}); // keep alive
  })();
}