UnrealClaude

Claude Code CLI integration for Unreal Engine 5.7 - Get AI coding assistance with built-in UE5.7 documentation context directly in the editor.

Supported Platforms: Windows (Win64), Linux, and macOS (Apple Silicon). On Windows please use Claude Code 2.1.52 or older if you run into tool issues (2.1.71 seems ok from testing so far).

Overview

UnrealClaude integrates the Claude Code CLI directly into the Unreal Engine 5.7 Editor. Instead of using the API directly, this plugin shells out to the claude command-line tool, leveraging your existing Claude Code authentication and capabilities.

Key Features:

• Native Editor Integration - Chat panel docked in your editor with live streaming responses, tool call grouping, and code block rendering
• MCP Server - 20+ Model Context Protocol tools for actor manipulation, Blueprint editing, level management, materials, input, and more
• Dynamic UE 5.7 Context System - The MCP bridge includes a dynamic context loader that provides accurate UE 5.7 API documentation on demand
• Blueprint Editing - Create and modify Blueprints, Animation Blueprints, state machines (Few bugs still, don't rely on fully)
• Level Management - Open, create, and manage levels and map templates programmatically
• Asset Management - Search assets, query dependencies and referencers
• Async Task Queue - Long-running operations won't timeout
• Script Execution - Claude can write, compile (via Live Coding), and execute scripts with your permission
• Session Persistence - Conversation history saved across editor sessions
• Project-Aware - Automatically gathers project context (modules, plugins, assets) and is able to see editor viewports
• Uses Claude Code Auth - No separate API key management needed

Prerequisites

1. Install Claude Code CLI

npm install -g @anthropic-ai/claude-code

2. Authenticate Claude Code

claude auth login

This will open a browser window to authenticate with your Anthropic account (Claude Pro/Max subscription) or set up API access.

3. Verify Installation

claude --version
claude -p "Hello, can you see me?"

Installation

(Check the Editor category in the plugin browser. You might need to scroll down for it if search doesn't pick it up)

Step 1: Clone and Build

This plugin must be built from source for your platform and engine version. No prebuilt binaries are included.

1. Clone this repository (includes the MCP bridge submodule):

   git clone --recurse-submodules https://github.com/Natfii/UnrealClaude.git
   

   If you already cloned without --recurse-submodules, run:

   cd UnrealClaude
   git submodule update --init
   

2. Build the plugin:

   Windows:

   Engine\Build\BatchFiles\RunUAT.bat BuildPlugin -Plugin="PATH\TO\UnrealClaude\UnrealClaude\UnrealClaude.uplugin" -Package="OUTPUT\PATH" -TargetPlatforms=Win64
   

   Linux:

   Engine/Build/BatchFiles/RunUAT.sh BuildPlugin -Plugin="/path/to/UnrealClaude/UnrealClaude/UnrealClaude.uplugin" -Package="/output/path" -TargetPlatforms=Linux
   

   macOS:

   Engine/Build/BatchFiles/RunUAT.sh BuildPlugin -Plugin="/path/to/UnrealClaude/UnrealClaude/UnrealClaude.uplugin" -Package="/output/path" -TargetPlatforms=Mac
   

Step 2: Install the Plugin

Copy the built plugin to either your project or engine plugins folder.

Option A: Project Plugin (Recommended)

Copy the build output to your project's Plugins directory:

YourProject/
├── Content/
├── Source/
└── Plugins/
    └── UnrealClaude/
        ├── Binaries/
        ├── Source/
        ├── Resources/
        ├── Config/
        └── UnrealClaude.uplugin

Option B: Engine Plugin (All Projects)

Copy to your engine's plugins folder:

Windows:

C:\Program Files\Epic Games\UE_5.7\Engine\Plugins\Marketplace\UnrealClaude\

Linux:

/path/to/UnrealEngine/Engine/Plugins/Marketplace/UnrealClaude/

Step 3: Install MCP Bridge Dependencies

Required for Blueprint tools and editor integration:

cd <PluginPath>/UnrealClaude/Resources/mcp-bridge
npm install

Step 4: Launch

Launch the editor - the plugin will load automatically.

macOS Quick Start (Apple Silicon)

For full details, see INSTALL_MAC.md.

1. Install Node.js and Claude Code CLI:

   brew install node
   npm install -g @anthropic-ai/claude-code
   claude
   

2. Install the plugin into your project's Plugins/ directory
3. Install MCP bridge dependencies:

   cd YourProject/Plugins/UnrealClaude/Resources/mcp-bridge
   npm install
   

4. Launch the editor and open Tools > Claude Assistant

Linux Quick Start (Rocky/Fedora)

For full details, see INSTALL_LINUX.md.

1. Install Libraries:

   sudo dnf install -y nss nspr mesa-libgbm libXcomposite libXdamage libXrandr alsa-lib pciutils-libs libXcursor atk at-spi2-atk pango cairo gdk-pixbuf2 gtk3
   

2. Install Clipboard Support:

   sudo dnf install -y wl-clipboard   # Wayland
   sudo dnf install -y xclip          # X11 fallback
   

3. Setup Wayland:

   export SDL_VIDEODRIVER=wayland
   export UE_Linux_EnableWaylandNative=1
   

4. Build and Launch:

   ./UnrealEditor -vulkan
   

Usage

Opening the Claude Panel

Menu → Tools → Claude Assistant

Example Prompts

How do I create a custom Actor Component in C++?

What's the best way to implement a health system using GAS?

Explain World Partition and how to set up streaming for an open world.

Write a BlueprintCallable function that spawns particles at a location.

How do I properly use TObjectPtr<> vs raw pointers in UE5.7?

Input Shortcuts

| Shortcut | Action | |----------|--------| | Enter | Send message | | Shift+Enter | New line in input | | Escape | Cancel current request |

Features

Session Persistence

Conversations are automatically saved to your project's Saved/UnrealClaude/ directory and restored when you reopen the editor. The plugin maintains conversation context across sessions.

Project Context

UnrealClaude automatically gathers information about your project:

• Source modules and their dependencies
• Enabled plugins
• Project settings
• Recent assets
• Custom CLAUDE.md instructions

Scripting

MCP Server

The plugin includes a Model Context Protocol (MCP) server with 20+ tools that expose editor functionality to Claude and external tools. The MCP server runs on port 3000 by default and starts automatically when the editor loads.

Tool Categories:

• Actor Tools - Spawn, move, delete, inspect, and set properties on actors
• Level Management - Open levels, create new levels from templates, list available templates
• Blueprint Tools - Create and modify Blueprints (variables, functions, nodes, pins)
• Animation Blueprint Tools - Full state machine editing (states, transitions, conditions, batch operations)
• Asset Tools - Search assets, query dependencies and referencers with pagination
• Character Tools - Character configuration, movement settings, and data queries
• Material Tools - Material and material instance operations
• Enhanced Input Tools - Input action and mapping context management
• Utility Tools - Console commands, output log, viewport capture, script execution
• Async Task Queue - Background execution for long-running operations

For full MCP tool documentation with parameters, examples, and API details, see UnrealClaude's MCP Bridge repository.

Dynamic UE 5.7 Context System

The MCP bridge includes a dynamic context loader that provides accurate UE 5.7 API documentation on demand. Use unreal_get_ue_context to query by category (animation, blueprint, slate, actor, assets, replication) or search by keywords. Context status is shown in unreal_status output.

Configuration

Custom System Prompts

You can extend the built-in UE5.7 context by creating a CLAUDE.md file in your project root:

# My Project Context

## Architecture
- This is a multiplayer survival game
- Using Dedicated Server model
- GAS for all abilities

## Coding Standards
- Always use UPROPERTY for Blueprint access
- Prefix interfaces with I (IInteractable)
- Use GameplayTags for ability identification

Allowed Tools

By default, the plugin runs Claude with these tools: Read, Write, Edit, Grep, Glob, Bash. You can modify this in `ClaudeSubsyst