diff --git a/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/AppStateService.cs b/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/AppStateService.cs
index f377aa8fb2..acd9b29119 100644
--- a/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/AppStateService.cs
+++ b/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/AppStateService.cs
@@ -18,7 +18,7 @@ public partial class AppStateService
 
     public AppStateModel CurrentSettings => _appStateModel;
 
-    public AppStateService(ILogger<SettingsService> logger)
+    public AppStateService(ILogger logger)
     {
         this.logger = logger;
         _filePath = PersistenceService.SettingsJsonPath("state.json");
diff --git a/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/Extensions/BuiltInExtensionService.cs b/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/Extensions/BuiltInExtensionService.cs
index f7062721ff..8a69949c3b 100644
--- a/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/Extensions/BuiltInExtensionService.cs
+++ b/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/Extensions/BuiltInExtensionService.cs
@@ -4,6 +4,6 @@
 
 namespace Microsoft.CommandPalette.UI.Services.Extensions;
 
-internal class BuiltInExtensionService : IExtensionService
+public class BuiltInExtensionService : IExtensionService
 {
 }
diff --git a/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/Extensions/IExtensionService.cs b/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/Extensions/IExtensionService.cs
index 4ea9d89c55..e61a4f2737 100644
--- a/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/Extensions/IExtensionService.cs
+++ b/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/Extensions/IExtensionService.cs
@@ -4,6 +4,7 @@
 
 namespace Microsoft.CommandPalette.UI.Services.Extensions;
 
-internal interface IExtensionService
+public interface IExtensionService
 {
+    CommandViewModel
 }
diff --git a/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/Extensions/JsonRPCExtensionService.cs b/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/Extensions/JsonRPCExtensionService.cs
new file mode 100644
index 0000000000..b6dd152025
--- /dev/null
+++ b/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/Extensions/JsonRPCExtensionService.cs
@@ -0,0 +1,9 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace Microsoft.CommandPalette.UI.Services.Extensions;
+
+public class JsonRPCExtensionService : IExtensionService
+{
+}
diff --git a/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/Extensions/WinRTExtensionService.cs b/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/Extensions/WinRTExtensionService.cs
index 4b3efc35e2..4064607c23 100644
--- a/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/Extensions/WinRTExtensionService.cs
+++ b/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/Extensions/WinRTExtensionService.cs
@@ -4,6 +4,6 @@
 
 namespace Microsoft.CommandPalette.UI.Services.Extensions;
 
-internal class WinRTExtensionService : IExtensionService
+public class WinRTExtensionService : IExtensionService
 {
 }
diff --git a/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/SettingsService.cs b/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/SettingsService.cs
index 658b4a5c45..5725fd3867 100644
--- a/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/SettingsService.cs
+++ b/src/modules/Deux/UI/Microsoft.CommandPalette.UI.Services/SettingsService.cs
@@ -22,7 +22,7 @@ public partial class SettingsService
 
     public SettingsModel CurrentSettings => _settingsModel;
 
-    public SettingsService(ILogger<SettingsService> logger)
+    public SettingsService(ILogger logger)
     {
         this.logger = logger;
         _filePath = PersistenceService.SettingsJsonPath("settings.json");
diff --git a/src/modules/Deux/UI/Microsoft.CommandPalette.UI.ViewModels/CommandViewModel.cs b/src/modules/Deux/UI/Microsoft.CommandPalette.UI.ViewModels/CommandViewModel.cs
new file mode 100644
index 0000000000..827383b52c
--- /dev/null
+++ b/src/modules/Deux/UI/Microsoft.CommandPalette.UI.ViewModels/CommandViewModel.cs
@@ -0,0 +1,25 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using CommunityToolkit.Mvvm.ComponentModel;
+using Microsoft.CommandPalette.Extensions;
+using Microsoft.CommandPalette.Extensions.Toolkit;
+using Windows.Foundation;
+
+namespace Microsoft.CmdPal.UI.ViewModels;
+
+public sealed partial class CommandViewModel : ObservableObject
+{
+    public string Title { get; set; } = string.Empty;
+
+    public string Subtitle { get; set; } = string.Empty;
+
+    public IIconInfo Icon { get; set; }
+
+    public Details Details { get; set; }
+
+    public event TypedEventHandler<object, IPropChangedEventArgs>? PropChanged;
+
+    public bool IsEnabled { get; set; }
+}
diff --git a/src/modules/Deux/UI/Microsoft.CommandPalette.UI/App.xaml.cs b/src/modules/Deux/UI/Microsoft.CommandPalette.UI/App.xaml.cs
index ee34e74614..eccbdbf917 100644
--- a/src/modules/Deux/UI/Microsoft.CommandPalette.UI/App.xaml.cs
+++ b/src/modules/Deux/UI/Microsoft.CommandPalette.UI/App.xaml.cs
@@ -5,6 +5,7 @@
 using Microsoft.CommandPalette.UI.Helpers;
 using Microsoft.CommandPalette.UI.Pages;
 using Microsoft.CommandPalette.UI.Services;
+using Microsoft.CommandPalette.UI.Services.Extensions;
 using Microsoft.CommandPalette.ViewModels;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
@@ -31,7 +32,6 @@ public partial class App : Application
 
     public ETWTrace EtwTrace { get; private set; } = new ETWTrace();
 
-
     public App(ILogger logger)
     {
         this.logger = logger;
@@ -70,6 +70,15 @@ public partial class App : Application
         services.AddSingleton<SettingsService>();
         services.AddSingleton<AppStateService>();
 
+        // Register extension services
+        // We do these before other services so that they are available
+        // during initialization of other services. Technically, they should
+        // be registered before other services require them, but this is
+        // a simple way to ensure that.
+        services.AddSingleton<IExtensionService, BuiltInExtensionService>();
+        services.AddSingleton<IExtensionService, WinRTExtensionService>();
+        services.AddSingleton<IExtensionService, JsonRPCExtensionService>();
+
         // Register services
         services.AddSingleton<TrayIconService>();