hashlib

Prepare a hashlib release — changelog section, version bump, release-grade verification, bump commit — and hand the tag push to the maintainer. Also orchestrates the cross-repo cascade (convertlib → hashlib → cipherlib).

Measure hashlib performance properly — per-algorithm before/after comparison for optimization work, compiled-exe runs, correct interpretation. Use when optimizing, when asked "is this faster", to compare against crypto/pointycastle/hash, or before/after any change to a hot path ($update, $process, sink internals).

Implement a new hash/MAC/KDF algorithm in hashlib end-to-end — sink, wrapper, exports, cited test vectors, compare tests, benchmark, README row, changelog. Use when asked to add, implement, or port a hash algorithm, checksum, MAC, or KDF.

Run hashlib's CI gate locally, scoped to the current change — format, analyze, VM tests, plus node/integration/pana when the diff warrants them. Use before committing, when asked to "check", "verify", "preflight", or "is this ready", and as the final step of any code change.