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Mutation Testing

80 / 100 · Low risk

Fine to try. Some of what it can do is expected: a coding skill usually runs build and test commands.

By PramodDutta/qaskills (GitHub) · coding · 246 stars · scanned at commit 8d6cf5f

Run mutation testing with StrykerJS for TypeScript/JavaScript and mutmut for Python to measure whether your test suite actually catches bugs, enforce mutation score thresholds, and keep runs fast with incremental mode in CI.

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'mutation-testing' ] || [ -L ~/.agents/skills/'mutation-testing' ]; then echo 'A skill folder named mutation-testing already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/PramodDutta/qaskills' "$d" && git -C "$d" checkout --quiet '8d6cf5f6db54e56d14bd0ea2c9cfe7a097fb07ee' -- 'seed-skills/mutation-testing' && mkdir -p ~/.agents/skills && cp -R "$d"/'seed-skills/mutation-testing' ~/.agents/skills/'mutation-testing' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'mutation-testing' ~/.claude/skills/'mutation-testing' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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Score history