dotnet-skills Current release catalog-v2026.4.5.0
Skill page Testing v1.0.0

Stryker.NET

Use the open-source free `Stryker.NET` mutation testing tool for .NET. Use when a repo needs to measure whether tests actually catch faults, especially in critical libraries or domains.

Trigger On

  • the repo uses or wants Stryker.NET
  • mutation testing is needed for high-risk code

Workflow

  1. Run mutation testing on critical projects, not blindly on the whole mono-repo.
  2. Keep it out of the fastest PR path unless the repo explicitly accepts the runtime cost.
  3. Stabilize tests first; mutation testing amplifies flaky or slow suites.

Deliver

  • explicit mutation-test scope
  • reproducible Stryker commands

Validate

  • the selected scope is affordable in CI
  • mutation score is interpreted with test quality, not as a vanity number

Load References

  • references/stryker.md
  • references/commands.md
  • references/patterns.md

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