·mutation-testing
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mutation-testing

Mutation testing to validate test quality before PR creation. Runs mutation tools, enforces 100% kill rate, reports surviving mutants with recommended fixes. Activate when validating test coverage, preparing pull requests, checking test quality, or when asked about mutation testing.

63Installs·3Trend·@jwilger

Installation

$npx skills add https://github.com/jwilger/agent-skills --skill mutation-testing

How to Install mutation-testing

Quickly install mutation-testing AI skill to your development environment via command line

  1. Open Terminal: Open your terminal or command line tool (Terminal, iTerm, Windows Terminal, etc.)
  2. Run Installation Command: Copy and run this command: npx skills add https://github.com/jwilger/agent-skills --skill mutation-testing
  3. Verify Installation: Once installed, the skill will be automatically configured in your AI coding environment and ready to use in Claude Code, Cursor, or OpenClaw

Source: jwilger/agent-skills.

SKILL.md

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Value: Feedback -- mutation testing closes the verification loop by proving that tests actually detect the bugs they claim to prevent. Without it, passing tests may provide false confidence.

Teaches the agent to run mutation testing as a quality gate before PR creation. Mutation testing makes small changes (mutations) to production code and checks whether tests catch them. Surviving mutants reveal gaps where bugs could hide undetected. The required mutation kill rate is 100%.

Detect the project type and run the appropriate mutation testing tool.

Mutation testing to validate test quality before PR creation. Runs mutation tools, enforces 100% kill rate, reports surviving mutants with recommended fixes. Activate when validating test coverage, preparing pull requests, checking test quality, or when asked about mutation testing. Source: jwilger/agent-skills.

Facts (cite-ready)

Stable fields and commands for AI/search citations.

Install command
npx skills add https://github.com/jwilger/agent-skills --skill mutation-testing
Category
</>Dev Tools
Verified
First Seen
2026-02-20
Updated
2026-03-10

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Quick answers

What is mutation-testing?

Mutation testing to validate test quality before PR creation. Runs mutation tools, enforces 100% kill rate, reports surviving mutants with recommended fixes. Activate when validating test coverage, preparing pull requests, checking test quality, or when asked about mutation testing. Source: jwilger/agent-skills.

How do I install mutation-testing?

Open your terminal or command line tool (Terminal, iTerm, Windows Terminal, etc.) Copy and run this command: npx skills add https://github.com/jwilger/agent-skills --skill mutation-testing Once installed, the skill will be automatically configured in your AI coding environment and ready to use in Claude Code, Cursor, or OpenClaw

Where is the source repository?

https://github.com/jwilger/agent-skills