Mutation Testing

Invoked when test coverage is high but confidence in test quality is low. Mutation testing reveals tests that pass by accident (weak assertions).


Read the full skill on GitHub. The site shows the first section; the canonical full content with all principles, examples, and rules lives in the repo.

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What the full skill covers

  • Micro-Skills
  • Tools by Language
  • Outputs
  • Scope
  • Guardrails
  • Ask-When-Ambiguous
  • Decision Criteria
  • Success Criteria