Vector Forge skill: what it does and how to install it

What it does. Runs baseline mutation tests against existing vectors, uses Trailmark call graphs to triage escaped mutants, then creates Wycheproof-format vectors and re-runs tests to compare kill rates. It builds harnesses that check valid and invalid inputs, round trips, and cross-implementation results, and writes a coverage report.

When to use it. For cryptographic algorithms or protocols with an implementation, test harness and mutation framework. It does not apply when no implementation exists, the implementation is trivial, or the target is application logic.