ClaudusBridge A Real AI Coding Agent, Inside Unreal Engine

ClaudusBridge embeds a full AI coding agent directly inside the Unreal Editor and gives it (or any external MCP client) 900+ tools to drive your project. Open the in-editor terminal, sign in with your own Claude, ChatGPT/Codex, or Gemini account, and start building Blueprints, materials, Niagara systems, UMG, levels and more in plain language. No API keys. No cloud middleman. 100% local. Documentation: https://galidar.com/claudusbridge

The Agent Lives in the Editor

The ClaudusCode module ships an in-editor Slate terminal plus a bundled agent runtime (a Claude Code fork that also drives ChatGPT/Codex and Gemini). It launches headless via your system Node install and is driven over the Agent Client Protocol (ACP) by a native C++ client. The terminal is a real PTY (ConPTY on Windows, forkpty on Mac/Linux), so the agent runs exactly as it would in any shell, but with full access to Unreal.

• Your accounts, your sessions — sign in with Claude / ChatGPT / Gemini logins. No API keys to manage or pay for separately.

• Multi-provider — one agent, switchable across Anthropic, OpenAI and Google models (e.g. Opus, GPT-5.x, Gemini).

• 100% local — the agent and the bridge run on your machine. Your project never leaves it.

900+ Tools, 65+ Toolsets

ClaudusBridge surfaces 900+ MCP tools across 65+ toolsets generated from Unreal's own reflection system, plus 14 native plugin toolsets — Multi-User, Asset, Level, Image, Chess, Material-Graph editing, Niagara script-graph authoring, Niagara system editing, Reflection (call any UFUNCTION by name), Multi-Agent Orchestration, AnimBlueprint, Simulation, Blueprint components, and Blueprint-to-C++ scaffolding — and your own author-able ToolLibrary Blueprints. The agent can:

• Create and edit Blueprints, Materials, Niagara, UMG, Sequencer and assets

• Read and author full material graphs — parameters, wiring, and Custom HLSL nodes

• Author Niagara function scripts and wire system user parameters and data interfaces

• Build and modify levels, spawn and arrange actors, save maps

• Inspect and manipulate textures and images

• Drive Multi-User (Concert) collaboration sessions

• Run any tool exposed through Unreal's toolset architecture

Run a Whole Fleet of Agents (new in 1.2.0)

One editor, many agents. The Orchestration toolset adds an async job queue (fire a long compile or batch migration, get a job id instantly, poll for the result — no client timeouts), self-declared agent sessions so every agent sees who is working on what, and advisory per-asset locks with auto-expiring leases so parallel agents never stomp the same asset. Verified with 20 concurrent agent sessions running jobs, tool calls and lock contention in seconds — the HTTP server is tuned for fleet-scale bursts out of the box.

Works With Any MCP Client

You are not locked into the embedded agent. ClaudusBridge runs a standard Model Context Protocol server over HTTP at 127.0.0.1:3000/mcp (JSON-RPC). Connect Claude Desktop, Cursor, Windsurf, VSCode, Gemini, or Codex and drive the same 900+ tools. The plugin can even write the MCP client config for you — and the bundled reconnect proxy keeps the connection alive across editor restarts, so rebuilding the plugin never drops your session.

To avoid flooding clients with hundreds of tools, the server defaults to tool-search mode: lightweight list_toolsets / describe_toolset / call_tool meta-tools let the agent discover and invoke tools on demand. Eager mode (every tool registered up front) is available if you prefer.

Multi-User Collaboration With Presence

Drop the agent and a human into the same Concert session as separate participants, each with their own presence avatar. ClaudusBridge reuses Unreal's existing Multi-User client and auto-configures it at startup — no engine fork, no second client. Watch the agent work alongside you in real time.

Cross-Platform

Built for Windows, Mac, and Linux on Unreal Engine 5.8. The agent runtime ships inside the plugin — only a system Node install is required.

What You Get

• Embedded AI coding agent (Claude / ChatGPT / Gemini) running inside Unreal

• In-editor terminal with a native ACP drive path for programmatic control

• 900+ MCP tools across 65+ toolsets, usable by the agent or any MCP client

• Multi-agent orchestration: background jobs, agent sessions, and asset locks for whole fleets

• Native material-graph and Niagara authoring the generic property APIs can't reach

• Multi-User collaboration with agent + human presence avatars

• Reconnect proxy: the MCP connection survives editor restarts and plugin rebuilds

• User-authorable ToolLibrary Blueprints to add your own tools

• 25 bundled Agent Skills teaching the agent editor workflows from day one

• No API keys, no cloud dependency — your own logins, fully local

By Galidar Studio. Sign in with your own AI accounts; standard provider terms apply.