**ctrlflow** is a lightweight Node‑JS library that lets you compose asynchronous operations into a single, easy‑to‑call function. By feeding an array (or nested object) of steps—each can be a normal async function, a parallel group, or a shortcut notation—the library runs them in sequence (or in parallel where specified), automatically propagates results, and catches both thrown exceptions and callback errors, invoking a final callback with any error. It’s aimed at developers who need a clear, error‑robust alternative to other async flow tools like async, step, or slide.