Initial implementation of MCP Server and Awake tools

.github/actions/spell-check/expect.txt

@@ -953,6 +953,7 @@ maxversiontested
 mber
 MBM
 MBR
+mcp
 MDICHILD
 MDL
 mdtext

.pipelines/ESRPSigning_core.json

@@ -237,7 +237,9 @@
             "PowerToys.DSC.dll",
             "PowerToys.DSC.exe",
 
-            "PowerToysSparse.msix"
+            "PowerToysSparse.msix",
+            "PowerToys.McpServer.dll",
+            "PowerToys.McpServer.exe"
           ],
             "SigningInfo": {
                 "Operations": [

Directory.Packages.props

@@ -65,6 +65,7 @@
     <PackageVersion Include="Microsoft.WindowsAppSDK.Runtime" Version="1.8.250907003" />
     <PackageVersion Include="Microsoft.Xaml.Behaviors.WinUI.Managed" Version="2.0.9" />
     <PackageVersion Include="Microsoft.Xaml.Behaviors.Wpf" Version="1.1.39" />
+    <PackageVersion Include="ModelContextProtocol" Version="0.4.0-preview.2" />
     <PackageVersion Include="ModernWpfUI" Version="0.9.4" />
     <!-- Moq to stay below v4.20 due to behavior change. need to be sure fixed -->
     <PackageVersion Include="Moq" Version="4.18.4" />

PowerToys.sln

@@ -330,6 +330,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "AwakeModuleInterface", "src
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Awake", "src\modules\awake\Awake\Awake.csproj", "{D940E07F-532C-4FF3-883F-790DA014F19A}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "PowerToys.McpServer", "src\McpServer\PowerToys.McpServer.csproj", "{8A6F5D3B-F59E-4F34-A1D3-3F69D3FDBD9D}"
+EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Community.PowerToys.Run.Plugin.UnitConverter", "src\modules\launcher\Plugins\Community.PowerToys.Run.Plugin.UnitConverter\Community.PowerToys.Run.Plugin.UnitConverter.csproj", "{BB23A474-5058-4F75-8FA3-5FE3DE53CDF4}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Community.PowerToys.Run.Plugin.UnitConverter.UnitTest", "src\modules\launcher\Plugins\Community.PowerToys.Run.Plugin.UnitConverter.UnitTest\Community.PowerToys.Run.Plugin.UnitConverter.UnitTest.csproj", "{3E424AD2-19E5-4AE6-B833-F53963EB5FC1}"
@@ -1454,6 +1456,14 @@ Global
 		{D940E07F-532C-4FF3-883F-790DA014F19A}.Release|ARM64.Build.0 = Release|ARM64
 		{D940E07F-532C-4FF3-883F-790DA014F19A}.Release|x64.ActiveCfg = Release|x64
 		{D940E07F-532C-4FF3-883F-790DA014F19A}.Release|x64.Build.0 = Release|x64
+		{8A6F5D3B-F59E-4F34-A1D3-3F69D3FDBD9D}.Debug|ARM64.ActiveCfg = Debug|ARM64
+		{8A6F5D3B-F59E-4F34-A1D3-3F69D3FDBD9D}.Debug|ARM64.Build.0 = Debug|ARM64
+		{8A6F5D3B-F59E-4F34-A1D3-3F69D3FDBD9D}.Debug|x64.ActiveCfg = Debug|x64
+		{8A6F5D3B-F59E-4F34-A1D3-3F69D3FDBD9D}.Debug|x64.Build.0 = Debug|x64
+		{8A6F5D3B-F59E-4F34-A1D3-3F69D3FDBD9D}.Release|ARM64.ActiveCfg = Release|ARM64
+		{8A6F5D3B-F59E-4F34-A1D3-3F69D3FDBD9D}.Release|ARM64.Build.0 = Release|ARM64
+		{8A6F5D3B-F59E-4F34-A1D3-3F69D3FDBD9D}.Release|x64.ActiveCfg = Release|x64
+		{8A6F5D3B-F59E-4F34-A1D3-3F69D3FDBD9D}.Release|x64.Build.0 = Release|x64
 		{BB23A474-5058-4F75-8FA3-5FE3DE53CDF4}.Debug|ARM64.ActiveCfg = Debug|ARM64
 		{BB23A474-5058-4F75-8FA3-5FE3DE53CDF4}.Debug|ARM64.Build.0 = Debug|ARM64
 		{BB23A474-5058-4F75-8FA3-5FE3DE53CDF4}.Debug|x64.ActiveCfg = Debug|x64
@@ -3345,6 +3355,7 @@ Global
 		{F5333ED7-06D8-4AB3-953A-36D63F08CB6F} = {3DCCD936-D085-4869-A1DE-CA6A64152C94}
 		{4E0FCF69-B06B-D272-76BF-ED3A559B4EDA} = {8EF25507-2575-4ADE-BF7E-D23376903AB8}
 		{A66E9270-5D93-EC9C-F06E-CE7295BB9A6C} = {8EF25507-2575-4ADE-BF7E-D23376903AB8}
+
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {C3A2F9D1-7930-4EF4-A6FC-7EE0A99821D0}

installer/PowerToysSetupCustomActionsVNext/CustomAction.cpp

@@ -1493,11 +1493,12 @@ UINT __stdcall TerminateProcessesCA(MSIHANDLE hInstall)
     }
     processes.resize(bytes / sizeof(processes[0]));
 
-    std::array<std::wstring_view, 42> processesToTerminate = {
+    std::array<std::wstring_view, 43> processesToTerminate = {
         L"PowerToys.PowerLauncher.exe",
         L"PowerToys.Settings.exe",
         L"PowerToys.AdvancedPaste.exe",
         L"PowerToys.Awake.exe",
+        L"PowerToys.McpServer.exe",
         L"PowerToys.FancyZones.exe",
         L"PowerToys.FancyZonesEditor.exe",
         L"PowerToys.FileLocksmithUI.exe",

src/McpServer/PowerToys.McpServer.csproj

@@ -0,0 +1,32 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <Import Project="..\Common.Dotnet.CsWinRT.props" />
+  <Import Project="..\Common.SelfContained.props" />
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>PowerToys.McpServer</RootNamespace>
+    <AssemblyName>PowerToys.McpServer</AssemblyName>
+    <Nullable>enable</Nullable>
+    <OutputPath>..\..\$(Platform)\$(Configuration)</OutputPath>
+    <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
+    <AppendRuntimeIdentifierToOutputPath>false</AppendRuntimeIdentifierToOutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <ApplicationManifest>PowerToys.McpServer.dev.manifest</ApplicationManifest>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(CIBuild)'=='true'">
+    <ApplicationManifest>PowerToys.McpServer.prod.manifest</ApplicationManifest>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Hosting" />
+    <PackageReference Include="ModelContextProtocol" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\settings-ui\Settings.UI.Library\Settings.UI.Library.csproj" />
+    <ProjectReference Include="..\common\ManagedCommon\ManagedCommon.csproj" />
+  </ItemGroup>
+</Project>

src/McpServer/PowerToys.McpServer.dev.manifest

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
+  <assemblyIdentity version="1.0.0.0" name="PowerToys.McpServer.app" />
+  <msix xmlns="urn:schemas-microsoft-com:msix.v1"
+        publisher="CN=PowerToys Dev, O=PowerToys, L=Redmond, S=Washington, C=US"
+        packageName="Microsoft.PowerToys.SparseApp"
+        applicationId="PowerToys.McpServer" />
+</assembly>

src/McpServer/PowerToys.McpServer.prod.manifest

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
+  <assemblyIdentity version="1.0.0.0" name="PowerToys.McpServer.app" />
+  <msix xmlns="urn:schemas-microsoft-com:msix.v1"
+        publisher="CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US"
+        packageName="Microsoft.PowerToys.SparseApp"
+        applicationId="PowerToys.McpServer" />
+</assembly>

src/McpServer/Program.cs

@@ -0,0 +1,57 @@
+// 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 System;
+using System.IO;
+using System.Threading.Tasks;
+using ManagedCommon;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+using ModelContextProtocol.Server;
+using PowerToys.McpServer.Tools;
+
+namespace PowerToys.McpServer
+{
+    internal sealed class Program
+    {
+        private static async Task<int> Main(string[] args)
+        {
+            // Initialize PowerToys logger
+            // Logger.InitializeLogger expects path relative to Constants.AppDataPath()
+            // which already points to LocalAppData\Microsoft\PowerToys
+            string logPath = Path.Combine("McpServer", "Logs");
+            Logger.InitializeLogger(logPath);
+            Logger.LogInfo("Starting PowerToys MCP Server with official SDK");
+
+            try
+            {
+                var builder = Host.CreateApplicationBuilder(args);
+
+                // Configure all logs to go to stderr (required for MCP protocol)
+                builder.Logging.AddConsole(consoleLogOptions =>
+                {
+                    consoleLogOptions.LogToStandardErrorThreshold = LogLevel.Trace;
+                });
+
+                // Register MCP server with stdio transport and tools
+                builder.Services
+                    .AddMcpServer()
+                    .WithStdioServerTransport()
+                    .WithToolsFromAssembly();
+
+                Logger.LogInfo("Building and running MCP host...");
+                await builder.Build().RunAsync();
+                Logger.LogInfo("MCP server shutdown complete");
+
+                return 0;
+            }
+            catch (Exception ex)
+            {
+                Logger.LogError("Fatal error in MCP server", ex);
+                return 1;
+            }
+        }
+    }
+}

src/McpServer/README.md

@@ -0,0 +1,102 @@
+# PowerToys Model Context Protocol Server
+
+This module hosts a standalone Model Context Protocol (MCP) server that exposes PowerToys functionality to MCP-compliant AI agents. The server is built as a .NET 9 console application that implements the MCP specification using the official ModelContextProtocol SDK.
+
+## Project Structure
+
+- **Program.cs**: Main entry point that configures the MCP server with stdio transport
+- **Tools/AwakeTools.cs**: Implementation of Awake-related MCP tools
+- **PowerToys.McpServer.csproj**: .NET 9 project configuration with MCP dependencies
+
+## Dependencies
+
+- **Microsoft.Extensions.Hosting**: For hosting infrastructure and dependency injection
+- **ModelContextProtocol**: Official MCP SDK for .NET
+- **PowerToys Settings Library**: Integration with PowerToys settings system
+- **ManagedCommon**: PowerToys logging and utilities
+
+## Available Tools
+
+| Tool Name | Description | Parameters | Module |
+|-----------|-------------|------------|--------|
+| `GetAwakeStatus` | Returns the current Awake configuration (mode, timers, display policy) | None | Awake |
+| `SetAwakePassive` | Set Awake to passive mode (allow system to sleep normally) | None | Awake |
+| `SetAwakeIndefinite` | Set Awake to indefinite mode (keep system awake until manually changed) | `keepDisplayOn` (bool), `force` (bool) | Awake |
+| `SetAwakeTimed` | Set Awake to timed mode (keep system awake for a specific duration) | `durationSeconds` (int), `keepDisplayOn` (bool), `force` (bool) | Awake |
+
+## Building and Running
+
+### Prerequisites
+- .NET 9 SDK
+- Visual Studio 2022 (recommended) or VS Code with C# extension
+
+### Build
+```bash
+# From PowerToys root directory
+msbuild src/McpServer/PowerToys.McpServer.csproj /p:Platform=x64 /p:Configuration=Debug
+
+# Or using dotnet CLI
+cd src/McpServer
+dotnet build -c Debug
+```
+
+### Run the Server
+The executable is built to `x64\Debug\PowerToys.McpServer.exe`. The server communicates over standard input/output using MCP framing (`Content-Length` header followed by JSON).
+
+**Example MCP Client Session:**
+1. Client sends `initialize` request with MCP version and capabilities
+2. Client calls `tools/list` to discover available PowerToys tools
+3. Client invokes `tools/call` with the desired tool name and arguments
+4. Server responds with tool execution results or errors
+
+The server will remain active until the process is terminated or a `shutdown` request is received.
+
+### Logging
+- Application logs are written to `%LOCALAPPDATA%\Microsoft\PowerToys\McpServer\Logs\`
+- MCP protocol logs are sent to stderr (required by MCP specification)
+
+## Architecture
+
+The server uses the official ModelContextProtocol .NET SDK and follows these patterns:
+
+- **Tool Discovery**: Tools are automatically discovered using `WithToolsFromAssembly()` 
+- **Tool Attributes**: Methods marked with `[McpServerTool]` and `[Description]` are exposed as MCP tools
+- **Parameter Binding**: Method parameters are automatically bound from MCP tool call arguments
+- **Error Handling**: Exceptions are caught and returned as MCP error responses
+- **Settings Integration**: Uses PowerToys settings system for configuration persistence
+
+## Adding New Module Tools
+
+1. Create a new static class in the `Tools/` directory (e.g., `FancyZonesTools.cs`)
+2. Mark the class with `[McpServerToolType]` attribute
+3. Implement static methods with `[McpServerTool]` and `[Description]` attributes:
+   ```csharp
+   [McpServerToolType]
+   public static class MyModuleTools
+   {
+       [McpServerTool]
+       [Description("Description of what this tool does")]
+       public static JsonObject MyTool(
+           [Description("Parameter description")] string parameter)
+       {
+           // Implementation here
+           return new JsonObject();
+       }
+   }
+   ```
+4. Follow existing patterns in `AwakeTools.cs` for:
+   - Settings integration using `SettingsUtils`
+   - Logging using `Logger.LogInfo/LogError`
+   - Error handling and response formatting
+   - PowerToys process detection and module status checks
+
+## Integration with PowerToys
+
+The MCP server integrates with PowerToys through:
+
+- **Settings System**: Uses the same settings files as the main PowerToys application
+- **Process Management**: Detects and interacts with running PowerToys processes
+- **Module Status**: Checks if specific PowerToys modules are enabled
+- **Logging**: Uses PowerToys logging infrastructure for troubleshooting
+
+Refer to the PowerToys developer documentation for build and packaging instructions.