Patterns for managing MSBuild item groups: Include/Remove/Update semantics, item metadata, batching with %(Metadata), transforms, per-item filtering, and cross-product batching pitfalls. Only activate in MSBuild/.NET build context.
Install
npx skills add dotnet/skills --skill item-managementnpx skills add dotnet/skills --skill item-management -a claude-code -gnpx skills add dotnet/skills --skill item-management -a codex -ggemini skills install https://github.com/dotnet/skills.git --path plugins/dotnet-msbuild/skills/item-managementgh skill install dotnet/skills item-managementgit 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/item-management ~/.claude/skills/item-management # Claude Code
cp -R /tmp/dotnet__skills/plugins/dotnet-msbuild/skills/item-management ~/.agents/skills/item-management # Codex, Cursor, Gemini CLI, Copilot, OpenCode