Performs pseudo-mutation analysis on .NET production code to find gaps in existing test suites. Use when the user asks to find weak tests, discover untested edge cases, check if tests would catch a bug, or evaluate test effectiveness through mutation-style reasoning.
Install
npx skills add dotnet/skills --skill test-gap-analysisnpx skills add dotnet/skills --skill test-gap-analysis -a claude-code -gnpx skills add dotnet/skills --skill test-gap-analysis -a codex -ggemini skills install https://github.com/dotnet/skills.git --path plugins/dotnet-test/skills/test-gap-analysisgh skill install dotnet/skills test-gap-analysisgit clone --depth 1 https://github.com/dotnet/skills /tmp/dotnet__skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/dotnet__skills/plugins/dotnet-test/skills/test-gap-analysis ~/.claude/skills/test-gap-analysis # Claude Code
cp -R /tmp/dotnet__skills/plugins/dotnet-test/skills/test-gap-analysis ~/.agents/skills/test-gap-analysis # Codex, Cursor, Gemini CLI, Copilot, OpenCode