The @sec‑ant/readable‑stream package supplies a lightweight, zero‑dependency polyfill that makes Web ReadableStreams fully spec‑compliant: it adds an async‑iterator implementation for consuming streams and a `from` factory that turns any iterable (sync or async) into a ReadableStream. It’s aimed at JavaScript/TypeScript developers who need reliable, standard‑conforming streaming I/O—especially in environments where native async iterator support or `ReadableStream.from` is unavailable.