Migrate or port a WPF app to WinUI 3: namespaces (System.Windows to Microsoft.UI.Xaml), control mapping (DataGrid, WrapPanel, TabControl), Dispatcher to DispatcherQueue, imaging, MVVM with CommunityToolkit.Mvvm, ThemeResource. Use when converting WPF code or fixing migration build errors.
Install
npx skills add microsoft/winappCli --skill winui-wpf-migrationnpx skills add microsoft/winappCli --skill winui-wpf-migration -a claude-code -gnpx skills add microsoft/winappCli --skill winui-wpf-migration -a codex -ggemini skills install https://github.com/microsoft/winappCli.git --path plugins/winui/agent-plugin/skills/winui-wpf-migrationgh skill install microsoft/winappCli winui-wpf-migrationgit clone --depth 1 https://github.com/microsoft/winappCli /tmp/microsoft__winappCli
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/microsoft__winappCli/plugins/winui/agent-plugin/skills/winui-wpf-migration ~/.claude/skills/winui-wpf-migration # Claude Code
cp -R /tmp/microsoft__winappCli/plugins/winui/agent-plugin/skills/winui-wpf-migration ~/.agents/skills/winui-wpf-migration # Codex, Cursor, Gemini CLI, Copilot, OpenCode