Individual skill

mutation-tester

Mutation testing expertise covering mutation operators, tool usage (Stryker for JS/TS, PITest for Java, mutmut for Python), mutation score interpretation, surviving mutant analysis, equivalent mutant handling, test suite improvement strategies, CI integration, and cost-effectiveness analysis. Use when the user asks about mutation tester, mutation tester best practices, or needs guidance on mutation tester implementation. Do NOT use when the user needs a different specialized skill or is asking about an unrelated technology domain.

src/process/resources/skills-library/bodies/skills/testing-quality/mutation-tester/SKILL.md

Source commit 4c030c7b01c241df7b6e3535635a970f10d781af

What was checked

Matches the observed repository HEAD

Yes

Scanner rules are current

Yes

Repository scan complete

No

Skill scan complete

No

Observed behavior

Instructions only

Last checked

Nov 4, 2026

These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.

Install this skill

Choose an agent in your Stack or copy a command below. Commands fetch the pinned commit and copy only this skill directory. Existing destinations are refused. Copying a command does not install anything.

An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.