Use only for MSBuild failure investigation, build-performance analysis, or review of existing build XML/extension contracts. A plan to convert a working legacy/non-SDK project to SDK style or migrate packages.config is a project-system migration, NOT a build-file review: do not activate, even to check scope. Framework/API upgrades are also excluded.
Install
npx skills add dotnet/skills --skill msbuildnpx skills add dotnet/skills --skill msbuild -a claude-code -gnpx skills add dotnet/skills --skill msbuild -a codex -ggemini skills install https://github.com/dotnet/skills.git --path plugins/dotnet/skills/msbuildgh skill install dotnet/skills msbuildgit clone --depth 1 https://github.com/dotnet/skills /tmp/dotnet__skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/dotnet__skills/plugins/dotnet/skills/msbuild ~/.claude/skills/msbuild # Claude Code
cp -R /tmp/dotnet__skills/plugins/dotnet/skills/msbuild ~/.agents/skills/msbuild # Codex, Cursor, Gemini CLI, Copilot, OpenCode