Create, build, run, and fix build errors in WinUI 3 apps (C# or C++) with WinApp CLI 0.7+: winapp new, winapp run, Native AOT, crash diagnosis. Use for a new WinUI app or a WinUI project that fails to build or crashes. Not for WPF, WinForms, or Electron apps that only reference the Windows App SDK.
Install
npx skills add microsoft/winappCli --skill winui-dev-workflownpx skills add microsoft/winappCli --skill winui-dev-workflow -a claude-code -gnpx skills add microsoft/winappCli --skill winui-dev-workflow -a codex -ggemini skills install https://github.com/microsoft/winappCli.git --path plugins/winui/agent-plugin/skills/winui-dev-workflowgh skill install microsoft/winappCli winui-dev-workflowgit 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-dev-workflow ~/.claude/skills/winui-dev-workflow # Claude Code
cp -R /tmp/microsoft__winappCli/plugins/winui/agent-plugin/skills/winui-dev-workflow ~/.agents/skills/winui-dev-workflow # Codex, Cursor, Gemini CLI, Copilot, OpenCode