UnrealBlueprintMCP

// Copyright Epic Games, Inc. All Rights Reserved. // UnrealBlueprintMCP Plugin - Phase 1 Implementation // Enables external AI agents to control Blueprint Editor through MCP protocol #pragma once #include "CoreMinimal.h" #include "Modules/ModuleManager.h" /** * Main module class for the UnrealBlueprintMCP plugin. * * This module provides the foundation for external AI agents (Gemini, Claude, etc.) * to programmatically control the Unreal Engine 5.6 Blueprint Editor through * the Model Context Protocol (MCP). * * Phase 1 Features: * - Plugin initialization and lifecycle management * - Editor toolbar integration with MCP menu * - Basic status window widget * - Settings management for MCP server configuration * * Architecture: * - External MCP Server (Python) <-> WebSocket <-> Unreal Plugin (C++) * - The plugin acts as a WebSocket client connecting to external Python MCP server * - Provides UI for monitoring connection status and basic configuration */ class FUnrealBlueprintMCPModule : public IModuleInterface { public: /** * Called when the module is loaded. * Initializes editor UI extensions and prepares for MCP server connection. */ virtual void StartupModule() override; /** * Called when the module is unloaded. * Cleans up UI extensions and closes any active connections. */ virtual void ShutdownModule() override; private: /** * Registers editor toolbar menu extensions. * Adds MCP menu button to the main editor toolbar. */ void RegisterMenuExtensions(); /** * Unregisters editor toolbar menu extensions. * Removes MCP menu button from the editor toolbar. */ void UnregisterMenuExtensions(); /** * Creates and populates the MCP menu with relevant actions. * @param MenuBuilder The menu builder to populate */ void CreateMCPMenu(class FMenuBuilder& MenuBuilder); /** * Opens the MCP status window. * Shows current connection status, server settings, and logs. */ void OpenMCPStatusWindow(); /** * Handles the menu action for opening status window. * Called when user clicks on "Open MCP Status" menu item. */ void OnOpenMCPStatusAction(); /** * Spawns the MCP status tab when requested. * @param Args Spawn arguments for the tab * @return The created dock tab containing the status widget */ TSharedRef<class SDockTab> SpawnMCPStatusTab(const class FSpawnTabArgs& Args); /** * Initializes the MCP client and attempts auto-connection if enabled. * Called during module startup to establish connection to MCP server. */ void InitializeMCPClient(); /** * Shuts down the MCP client and disconnects from server. * Called during module shutdown to ensure clean disconnection. */ void ShutdownMCPClient(); /** Handle to the registered menu extender */ TSharedPtr<class FExtender> MenuExtender; /** Handle to the registered toolbar extension */ TSharedPtr<const class FExtensionBase> ToolbarExtension; };