Guide for diagnosing and improving MSBuild project evaluation performance. Only activate in MSBuild/.NET build context. USE FOR: builds slow before any compilation starts, high evaluation time in binlog analysis, expensive glob patterns walking large directories (node_modules, .git, bin/obj), deep import chains (>20 levels), preprocessed output >10K lines indicating heavy evaluation, property…
Install
npx skills add dotnet/skills --skill eval-performancenpx skills add dotnet/skills --skill eval-performance -a claude-code -gnpx skills add dotnet/skills --skill eval-performance -a codex -ggemini skills install https://github.com/dotnet/skills.git --path plugins/dotnet-msbuild/skills/eval-performancegh skill install dotnet/skills eval-performancegit clone --depth 1 https://github.com/dotnet/skills /tmp/dotnet__skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/dotnet__skills/plugins/dotnet-msbuild/skills/eval-performance ~/.claude/skills/eval-performance # Claude Code
cp -R /tmp/dotnet__skills/plugins/dotnet-msbuild/skills/eval-performance ~/.agents/skills/eval-performance # Codex, Cursor, Gemini CLI, Copilot, OpenCode