What is Buril?
Buril is an AI copilot that lives inside the Unity Editor. It ships as a Unity Package Manager (UPM) package that runs in your Editor process and exposes the Editor to any MCP client you already use: Claude Code, Claude Desktop, GitHub Copilot in VS Code, opencode.
Two convictions shape the product:
- The Editor is the right place for AI. AssetDatabase, prefabs, scenes, scripts, the console, the build pipeline, the profiler: all of it is reachable from inside one Unity process. Buril exposes it as 3,691 tools (
IToolimplementations, 322 families, catalog of 2026-09-10) that an LLM calls over JSON-RPC. - Local by default. The bridge runs on your machine, on
127.0.0.1. Your project files do not leave it. The only network traffic is what your own AI provider triggers.
What ships today
| Layer | What it is |
|---|---|
Bridge UPM package (com.buril.bridge 1.7.0) | The Unity-side control plane: 3,691 ITools across Editor/Tools/*, MCP server on HTTP (/rpc) and TCP, one port per project. |
| Connector | The .mcpb bundle for Claude Desktop and the Claude Code plugin; plain MCP config for VS Code and opencode. See Connect your AI client. |
| DCC bridges | VRoid · Cascadeur · Marvelous Designer · ZBrush · Daz3D, each callable from your chat. |
| Multi-Agent Studio | Specialist agents with filtered tool views and a director that hands work off. |
| AI pipelines | Animation, clothing, 3D generation, 2D pixel, voice and lipsync. |
| Headless / CLI | buril "..." for batchmode workflows and CI. |
Free carries 243 tools; every paid plan carries all 3,691. You bring your own AI key or an already signed-in CLI (Claude Code, Codex, Copilot). See Plans.
Philosophy
- The Unity Editor is the IDE. Buril does not replace the Editor; it extends it. Every tool call runs against the live, currently open Unity process.
- You direct, the AI executes. The dispatch layer is deterministic: same JSON in, same effect out. The chat is the UX, not the contract.
- No invisible network calls. Buril does not phone home, does not bundle vendor keys, and does not upload scene data.
- Compose, don't bloat. Most tools are thin wrappers over one Unity API. The value is the surface: agents chain tools the way people chain commands.
Where to next
- Install Buril: the UPM package and the first-run wizard.
- Connect your AI client: Claude Code, Claude Desktop, Copilot, opencode.
- Your first tool call: confirm the wiring with
editor_state. - Tool catalog: the 3,691 tools by family.
- Plans: Free, Indie, Studio, Team, Enterprise.