Wycheproof skill: what it does and how to install it

What it does. Loads Wycheproof JSON vectors, filters test groups for supported parameters, converts encoded values and maps valid, invalid and acceptable results into a test harness. It covers encryption, signatures, key exchange and related constructions, with guidance for CI updates and diagnosing failures from flags and comments.

When to use it. Use it to check established cryptographic implementations against known attacks and edge cases. It is not intended for timing side-channel testing, finding unknown bugs through fuzzing, or custom algorithms outside its coverage.