AE.LTD Mutation Gate

What This Skill Does

Measures test quality beyond line coverage using mutation testing. Exposes weak assertions and generates actionable test hardening recommendations. Niche gem source: mutation-tester plugin from awesome-claude-code-toolkit.

1. Detect appropriate mutation tool (Stryker/mutmut/PIT)
2. Run targeted mutation tests on critical modules
3. Convert survived mutants into hardened tests
4. Track mutation score to threshold (target: 80%+)

Quick Start

User: "My tests pass but I'm not confident"
→ Detect stack → Run mutations → Report survivors → Harden tests

Workflow