The Unity editor, running an agent.

An open-source plugin that wires Claude, GPT, and your own models into the Unity editor — with 268 typed Unity API tools, an MCP server, and a BMAD loop your team actually owns.

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try it live

Real commands · pick a tab · copy

One command. Works in any Unity project.

# from your Unity project root
pnpm dlx mosaic-plugin@latest install

# verify the install
mosaic --version
# → mosaic 0.4.2

// What ships in the box

Four pillars. One plugin.

Every feature is open source, every tool is typed, every action is reversible. Pick the layer that fits the day’s work.

// Agentic editor

Agents that operate the Unity Editor like you do.

Chat, refactor, and BMAD agents share a single tool registry that wraps the entire Unity Editor API. Every action is auditable, every tool call is reversible.

268 typed Unity API tools out of the box
Streaming chat with cyan-glow editor feedback
Undo / redo across agent actions

See how it ships in tiers

// MCP server

Talk to Unity from any MCP client.

The plugin exposes the entire tool registry over the Model Context Protocol. Claude Code, Cursor, Cline, your own scripts — any MCP-aware client can drive the editor.

Standards-compliant MCP server, no lock-in
Stream tool results back to the agent in real time
Pluggable auth for team and CI environments

See how it ships in tiers

// BMAD loop

Plan, build, measure, adopt — automated.

BMAD drives Unity features through the same loop your team would, but at machine speed. Plans become PRs, PRs become builds, builds become measured outcomes.

Natural-language plans → working Unity prefabs
Per-feature build + smoke test pipeline
Adoption metrics fed back to the next plan

See how it ships in tiers

// Bring your own model

Claude, GPT, or your own. Local-first when you need it.

Provider adapters let you swap models without rewriting prompts. On-device inference via ONNX is supported for air-gapped industrial environments.

Claude (default) · GPT · Gemini · local ONNX
Privacy-first deploys for air-gapped facilities
Per-cohort cost + latency budgets

See how it ships in tiers

// How it ships

Free for individuals. Calm for teams. Built for the Gulf.

The plugin is and always will be MIT-licensed. Team and Enterprise tiers add the operational layer you need to ship with confidence.

Individual

Free

MIT licensed · forever

Open-source plugin for solo developers and indie studios. The full agentic editor, MCP server, and BMAD loop.

Every tool, every agent
Bring your own model API key
Community support on GitHub

Star on GitHub

Recommended

Team

$30

per seat / month · billed yearly

For studios shipping production Unity work together. Shared cost + latency budgets, team eval dashboards, and private model proxies.

Everything in Individual
Shared cost + latency dashboards
Private team model proxies
Eval suites for prompt regressions
Email support · 1 business day

Talk to us about Team

Enterprise

Custom

scoped to your environment

Air-gapped on-prem deployment, dedicated training, and direct line to the team. For Gulf B2B and regulated environments.

Everything in Team
On-prem / air-gapped deployment
Custom Unity API tools written for you
Dedicated training + onboarding
Founder-level reply on every issue

Enterprise inquiry

// Get started

Star it on GitHub. Or talk to us.

Both paths are first-class. Indie devs and small studios start with the open-source plugin; enterprise teams skip the trial and get a founder reply within a day.

Star on GitHub Enterprise inquiry