Mutation Tester

Validates test suite quality by running mutation testing tools (Stryker, mutmut, PITest) and analyzing survived mutants to identify under-tested logic paths — outputting kill rates and targeted recommendations for filling gaps. Use when code coverage looks healthy but test confidence is still low. Trigger with "run mutation tests", "find test gaps with mutation testing".

Type
subagent
GitHub stars
★ 2.5K
Repository
jeremylongshore/claude-code-plugins-plus-skills
Category
—

Install

  1. 1Manual install

    Copy the subagent file from the repository into ~/.claude/agents/<name>.md. The filename must match the subagent name (e.g. mutation-tester.md).

  2. 2Verify

    /agents, /commands or /hooks in Claude Code

    Restart Claude Code and list your installed components to confirm it was picked up.

⚠️ Some repositories ship a CLI installer — check the repo README for the recommended method.

View on GitHub ↗

Prefer the full source? The repository README is the authoritative install reference.