readdirp is a Node.js utility that recursively walks a directory tree, emitting each file or directory as a stream entry (or as a Promise‑resolved list). It provides a low‑memory, back‑pressured stream API as well as a simpler promise API, with flexible filters, depth limits, and optional stat information, making it useful for developers who need efficient, scalable directory traversal in scripts, build tools, or server‑side applications.