Diagnose MSBuild build performance bottlenecks using binary log analysis. Only activate in MSBuild/.NET build context. USE FOR: identifying why builds are slow by analyzing binlog performance summaries, detecting ResolveAssemblyReference (RAR) taking >5s, Roslyn analyzers consuming >30% of Csc time, single targets dominating >50% of build time, node utilization below 80%, excessive Copy tasks…
Install
npx skills add dotnet/skills --skill build-perf-diagnosticsnpx skills add dotnet/skills --skill build-perf-diagnostics -a claude-code -gnpx skills add dotnet/skills --skill build-perf-diagnostics -a codex -ggemini skills install https://github.com/dotnet/skills.git --path plugins/dotnet-msbuild/skills/build-perf-diagnosticsgh skill install dotnet/skills build-perf-diagnosticsgit 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/build-perf-diagnostics ~/.claude/skills/build-perf-diagnostics # Claude Code
cp -R /tmp/dotnet__skills/plugins/dotnet-msbuild/skills/build-perf-diagnostics ~/.agents/skills/build-perf-diagnostics # Codex, Cursor, Gemini CLI, Copilot, OpenCode