Run, debug, and UI-automate a Windows app in a persistent Windows Sandbox rather than the user's desktop. Use for disposable app testing, guest diagnostics, file transfer, and app or whole-desktop evidence. Builds remain on the host; connection and reconnect can briefly take focus.
Install
npx skills add microsoft/winappCli --skill winapp-sandboxnpx skills add microsoft/winappCli --skill winapp-sandbox -a claude-code -gnpx skills add microsoft/winappCli --skill winapp-sandbox -a codex -ggemini skills install https://github.com/microsoft/winappCli.git --path plugins/winapp/skills/winapp-sandboxgh skill install microsoft/winappCli winapp-sandboxgit clone --depth 1 https://github.com/microsoft/winappCli /tmp/microsoft__winappCli
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/microsoft__winappCli/plugins/winapp/skills/winapp-sandbox ~/.claude/skills/winapp-sandbox # Claude Code
cp -R /tmp/microsoft__winappCli/plugins/winapp/skills/winapp-sandbox ~/.agents/skills/winapp-sandbox # Codex, Cursor, Gemini CLI, Copilot, OpenCode