mutation-testing
About
This Claude skill performs mutation testing to evaluate test suite effectiveness by introducing code changes and measuring the kill rate of mutants. It helps developers identify weak tests and prove their tests actually catch bugs by analyzing which mutations survive. The skill is optimized for test quality validation and provides actionable metrics to strengthen test coverage.
Quick Install
Claude Code
Recommendednpx skills add mattnigh/skills_collection -a claude-code/plugin add https://github.com/mattnigh/skills_collectiongit clone https://github.com/mattnigh/skills_collection.git ~/.claude/skills/mutation-testingCopy and paste this command in Claude Code to install this skill
GitHub Repository
Frequently asked questions
What is the mutation-testing skill?
mutation-testing is a Claude Skill by mattnigh. Skills package instructions and resources that Claude loads on demand, so Claude can perform mutation-testing-related tasks without extra prompting.
How do I install mutation-testing?
Use the install commands on this page: add mutation-testing to Claude Code as a plugin, or clone its repository into your skills directory, then restart Claude so it picks up the skill.
What category does mutation-testing belong to?
mutation-testing is in the specialized-testing category, tagged mutation, stryker, test-quality, kill-rate, assertions and effectiveness.
Is mutation-testing free to use?
Yes. mutation-testing is listed on AIMCP and free to install. It runs inside Claude, so no separate service account is required to use the skill itself.
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