Mutation Test

Quality score: 70/100 · Category: Engineering · Sub-category: testing

Run mutation testing to validate test quality beyond code coverage. Use when assessing test effectiveness, finding weak tests, or validating test suite quality.

What this skill does

Mutation Test is a production-ready Claude Code skill (quality score 70/100) in the testing sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/mutation-test/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when assessing test effectiveness, finding weak tests, or validating test suite quality.

Who uses this skill

The Mutation Test skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It is part of the open ClaudSkills registry, a community-curated catalog of 15,000+ capabilities you can install for Claude Code — the Claude CLI agent.

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/mutation-test
curl -L https://claudskills.com/skills/mutation-test/SKILL.md \
  -o ~/.claude/skills/mutation-test/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/mutation-test/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/mutation-test/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\mutation-test\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

More Engineering skills

Browse all Engineering skills in the ClaudSkills registry, or explore these top-rated picks from the same category:

Browse all Engineering skills → Top 100 skills

Part of ClaudSkills — the open registry for Claude Code skills. · What's New · Install guide · About · llms.txt

Part of Acreator Store — Adam Lankamer's AI tools: GifPerfect · AspectPerfect · SlomoPerfect · Ucaption · UTagger · AutoXPoster · TestYourSkills