Add WinUI and WinApp CLI plugins

.github/plugin/marketplace.json

@@ -434,6 +434,68 @@
         "xpp"
       ],
       "license": "MIT"
+    },
+    {
+      "name": "winui",
+      "source": {
+        "source": "github",
+        "repo": "microsoft/WinAppCli",
+        "path": "plugins/winui/agent-plugin",
+        "ref": "v0.8.0",
+        "sha": "696222f72e80c669671845bd6c7b0286eefab987"
+      },
+      "description": "Agents and skills for WinUI 3 app development. Create new WinUI 3 desktop apps, convert from other frameworks (WPF, WinForms, Electron, Tauri, Flutter) to WinUI 3, or add features to existing WinUI 3 applications. Includes MSIX packaging, code signing, UI automation testing, and Windows App SDK guidance.",
+      "version": "0.8.0",
+      "author": {
+        "name": "Microsoft",
+        "url": "https://www.microsoft.com"
+      },
+      "homepage": "https://github.com/microsoft/WinAppCli",
+      "repository": "https://github.com/microsoft/WinAppCli",
+      "keywords": [
+        "windows",
+        "winui",
+        "winui3",
+        "xaml",
+        "windows-app-sdk",
+        "msix",
+        "packaging",
+        "desktop",
+        "wpf-migration",
+        "electron-migration"
+      ],
+      "license": "MIT"
+    },
+    {
+      "name": "winappcli",
+      "source": {
+        "source": "github",
+        "repo": "microsoft/WinAppCli",
+        "path": "plugins/winapp",
+        "ref": "v0.8.0",
+        "sha": "696222f72e80c669671845bd6c7b0286eefab987"
+      },
+      "description": "Windows app development, packaging, and distribution. Helps with creating Windows installers (MSIX), code signing, certificates, Windows SDK and Windows App SDK setup, package identity for Windows APIs (push notifications, background tasks, share target), appxmanifest authoring, and Microsoft Store distribution. Supports Electron, .NET, C++, Rust, Flutter, and Tauri apps.",
+      "version": "0.8.0",
+      "author": {
+        "name": "Microsoft",
+        "url": "https://www.microsoft.com"
+      },
+      "homepage": "https://github.com/microsoft/WinAppCli",
+      "repository": "https://github.com/microsoft/WinAppCli",
+      "keywords": [
+        "windows",
+        "msix",
+        "packaging",
+        "installer",
+        "code-signing",
+        "appxmanifest",
+        "microsoft-store",
+        "electron",
+        "tauri",
+        "desktop-app"
+      ],
+      "license": "MIT"
     }
   ]
 }

README.md

@@ -27,6 +27,8 @@ This marketplace also references plugins hosted in other repositories:
 
 - **[Power Platform Skills](https://github.com/microsoft/power-platform-skills)** — `power-pages`, `model-apps`, `mcp-apps`, `canvas-apps`, `code-apps-preview`, `mobile-app`, `power-automate`. Plugins for Power Platform development (Power Pages sites, model-driven and canvas apps, code apps, MCP App widgets, mobile apps, and Power Automate cloud flows).
 
+- **[WinUI and WinApp CLI](https://github.com/microsoft/WinAppCli)** — `winui`, `winappcli`. Build Windows apps: create WinUI 3 desktop apps or move existing apps to WinUI 3, then package, sign, and ship them with WinApp CLI (MSIX installers, certificates, package identity, and Microsoft Store distribution).
+
 ## 🤝 Contributing
 
 We'd love your contributions! Please read our [Contributing Guide](CONTRIBUTING.md) for details on how to submit pull requests.