Run language-dispatched mutation testing and generate dated per-project reports.
npx skills add https://github.com/AAbdulghany/fms --skill mutation-test-aabdulghany
Please help me install this Agent Skill. Skill: mutation-test Source: https://github.com/AAbdulghany/fms/tree/main/.claude/skills/mutation-test Command: npx skills add https://github.com/AAbdulghany/fms --skill mutation-test-aabdulghany
Mutation testing reveals whether a test suite truly constrains behaviour by detecting mutants that tests fail to catch, going beyond standard code-coverage metrics.
Run /mutation-test on a project to assess test strength across languages.
High-intent search queries and answers about installing and using this skill.
You can run cross-language mutation testing directly on your project to measure test strength. The Skill detects the project language and dispatches the appropriate mutation tester to uncover behavioural gaps missed by standard coverage.
Yes, language-dispatched mutation testing supports TypeScript and JavaScript via Stryker, Python via MutPy, Go via go-mutesting, and Ruby via Mutant. The Skill detects the language and applies the correct runner automatically.
You need the relevant mutation testers installed for your project's language. If none are present, the Skill gracefully degrades by issuing an install advisory and exit code 3, or you can run --check-only to report readiness.
Standard code coverage only checks if lines execute, while mutation testing verifies that tests truly constrain behaviour by introducing faults. This reveals whether your tests actually detect logic errors beyond just hitting lines.
Mutation testing results are saved as a dated report at projects/<name>/quality/mutation-YYYY-MM-DD.md. The six-section report includes trend data and highlights the top-5 surviving mutants to track test quality over time.
Mutation testing is designed to run at milestone boundaries and on-demand. This ensures you assess test strength at critical project phases rather than continuously, balancing audit depth with execution overhead.
jmaglyRun mutation testing across JavaScript, Python, Java projects and report scores and weak tests.
Space-DinosaursMap source modules to tests and produce a ranked coverage gap report.
JaiminVadadoriyaAnalyze test coverage gaps in JavaScript, TypeScript, and Python applications.
jorgealvesAggregate complexity, test coverage gaps, and change frequency to identify high-risk code hotspots.
