MSIX packaging, signing, and Microsoft Store publishing for WinUI 3 apps with WinApp CLI 0.7+: project packaging, Native AOT, certificates, self-contained deployment, CI/CD. Use when releasing or publishing a WinUI app. Not for WPF, WinForms, or Electron apps that only reference the Windows App SDK.
Install
npx skills add microsoft/winappCli --skill winui-packagingnpx skills add microsoft/winappCli --skill winui-packaging -a claude-code -gnpx skills add microsoft/winappCli --skill winui-packaging -a codex -ggemini skills install https://github.com/microsoft/winappCli.git --path plugins/winui/agent-plugin/skills/winui-packaginggh skill install microsoft/winappCli winui-packaginggit 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-packaging ~/.claude/skills/winui-packaging # Claude Code
cp -R /tmp/microsoft__winappCli/plugins/winui/agent-plugin/skills/winui-packaging ~/.agents/skills/winui-packaging # Codex, Cursor, Gemini CLI, Copilot, OpenCode