promise‑assist is a lightweight NPM library that adds utility helpers for working with native JavaScript promises. It provides functions such as `sleep` (delay execution), `timeout` (limit how long a promise may run), `deferred` (create a promise with external resolve/reject), `retry` (automatically retry a failing async/sync operation) and `waitFor` (test‑friendly retry with sensible defaults). The package is aimed at developers who need concise, reusable promise‑handling patterns in Node.js or browser code.