mutation-testing
Diff-scoped mutation testing to verify test quality beyond coverage metrics. Detects language, selects the appropriate tool (Stryker, mutmut, cargo-mutants, PIT, gremlins), and runs mutations only on changed code. Use when asked to run mutation testing, check test quality, find weak tests, verify test coverage is meaningful, or "are my tests actually catching bugs?". Also use after TDD cycle completes or when bugmagnet identifies test coverage gaps. Triggers on: mutation testing, mutant, test quality, weak tests, test effectiveness, "do my tests catch bugs", "are these tests good enough", "verify test quality", "mutation score".
Installation and usage
Diff-scoped mutation testing to verify test quality beyond coverage metrics. Detects language, selects the appropriate tool (Stryker, mutmut, cargo-mutants, PIT, gremlins), and runs mutations only on changed code. Use when asked to run mutation testing, check test quality, find weak tests, verify test coverage is meaningful, or "are my tests actually catching bugs?". Also use after TDD cycle completes or when bugmagnet identifies test coverage gaps. Triggers on: mutation testing, mutant, test quality, weak tests, test effectiveness, "do my tests catch bugs", "are these tests good enough", "verify test quality", "mutation score".
Once installed, you can use this skill by running the following command in your terminal:
skills use mutation-testing