`with-callback` is a tiny utility that converts Node‑style functions that expect a `(err, …result)` callback into promises. By calling `withCallback` with either a wrapper that receives the callback or directly with the target function and its arguments, developers can work with async APIs using native `Promise` syntax without pulling in custom promise libraries. It’s aimed at JavaScript/Node developers who need a simple bridge between callback‑based code and modern promise‑based workflows.