node‑qassert is a drop‑in replacement for Node’s built‑in `assert` library that adds clearer error messages and extra assertion helpers such as `within()` (numeric range), `inorder()` (sorted array check), and versatile `contains()`/`notContains()` checks for strings, buffers, arrays and objects. It’s aimed at JavaScript/Node developers who write unit tests and want more expressive, user‑friendly assertions without leaving the standard `assert` API.