Flat Promise is a tiny Node.js utility that creates a standard JavaScript Promise while exposing its `resolve` and `reject` callbacks for external use. It’s aimed at developers who need to control a promise’s settlement outside the executor function—e.g., in callbacks or event‑driven code—while still being able to pass the promise around the codebase. Use the safer default `flatPromise()` for one‑time control or `flatPromise.withControl()` when you deliberately want the control methods to travel with the promise.