Stand-alone mutation testing of a target: run cargo-mutants (Rust) or Stryker.NET (C) over a file/module/project, surface the surviving mutants, and emit each as a work-unit proposal describing the UNDER-TESTED behavior class for a later tdd run to cover. Use when the user wants to mutation-test code, measure mutation score, find gaps the existing tests don't catch, or harden a module's test suite — WITHOUT writing tests in this run. Analysis-only: it proposes coverage gaps as data; it never writes tests itself. Supports Rust (cargo-mutants) and C (dotnet-stryker); degrades to a clear skip when the tool is absent.
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AGENT SKILLS ATLASIncludes Report Bug and other workflows.
Claude Code
Codex
Cursor
GitHub Copilot
Gemini CLISupported by the Atlas install prompt. Skill-specific requirements vary.
Pack stats
What’s included
Mutation
Stand-alone mutation testing of a target: run cargo-mutants (Rust) or Stryker.NET (C) over a file/module/project, surface the surviving mutants, and emit each as a work-unit proposal describing the UNDER-TESTED behavior class for a later tdd run to cover. Use when the user wants to mutation-test code, measure mutation score, find gaps the existing tests don't catch, or harden a module's test suite — WITHOUT writing tests in this run. Analysis-only: it proposes coverage gaps as data; it never writes tests itself. Supports Rust (cargo-mutants) and C (dotnet-stryker); degrades to a clear skip when the tool is absent.
Report Bug
Report a bug as a GitHub Issue with description, reproduction steps, and initial analysis
Quick start
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After installation, start with a request like:
Use the Mutation skill to help with my task.
Ask me for the context you need before getting started.Requirements & license
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