const started = Date.now();
let got: unknown = null;
const proc = Bun.spawn(["bun", `${import.meta.dir}/child.ts`], {
  stdio: ["ignore", "inherit", "inherit"],
  serialization: "advanced",
  ipc: (m) => { got = m; },
});
const timeout = new Promise((r) => setTimeout(() => r("TIMEOUT"), 4000));
const outcome = await Promise.race([proc.exited, timeout]);
console.info(JSON.stringify({ outcome, got, ms: Date.now() - started }));
if (outcome === "TIMEOUT") proc.kill();