Sandbox lifetime

const info = await fetch(`${apiUrl}/api/sandboxes/${sandboxId}`, {
  headers: { "X-API-Key": apiKey },
}).then((r) => r.json());

console.log(info.status);  // "running"
console.log(info.endAt);   // "2026-09-02T04:30:26Z"

const remainingMs = Date.parse(info.endAt) - Date.now();

if (remainingMs < 30 * 60 * 1000) {          // half an hour left
  const cp = await sandbox.createCheckpoint(`rollover-${Date.now()}`);
  // wait for the checkpoint to report ready, then create a new sandbox
  // and restore onto it before this one ends
}