hashdirectory is an npm package that computes a SHA‑1 checksum for an entire directory using the same algorithm Git applies to files and trees. It lets developers generate deterministic hashes for static assets (e.g., for cache‑busting) without needing Git installed, offering synchronous, callback‑based, or promise‑based APIs. The tool is aimed at Node.js developers who need reliable directory hashing in build or deployment scripts.