Function start

design/src/daemon.ts:527–563

()

// ─── Startup ─────────────────────────────────────────────────────

export function start(): { port: number } {
  const portArg = process.env.DESIGN_DAEMON_PORT;
  const port = portArg ? parseInt(portArg, 10) : 0;
  serverRef = Bun.serve({
    port,
    hostname: "127.0.0.1",
    fetch: fetchHandler,
  });
  const actualPort = serverRef.port;
  const state: DaemonState = {
    pid: process.pid,
    port: actualPort,
    startedAt: new Date().toISOString(),
    version: VERSION,
    serverPath: process.argv[1] || "",
    cmdlineMarker: CMDLINE_MARKER,
  };
  writeStateFile(state);
  dlog(`DAEMON_STARTED port=${actualPort} pid=${process.pid} version=${VERSION}`);
  // Stdout line the spawning CLI parses to learn the port quickly.
  console.log(`DAEMON_STARTED port=${actualPort}`);

  idleInterval = setInterval(idleCheckTick, IDLE_CHECK_INTERVAL_MS);

  process.on("SIGTERM", () => {
    void gracefulShutdown(0);
  });
  process.on("SIGINT", () => {
    void gracefulShutdown(0);
  });
  process.on("uncaughtException", (e) => {
    dlog(`uncaughtException: ${(e as Error).stack || (e as Error).message}`);
    void gracefulShutdown(1);
  });

  return { port: actualPort };
}

if (import.meta.main) {
  start();