What is Summer Engine?

Summer Engine is a real desktop game engine built on the foundation of Godot, adapted so AI agents can build inside it. Think Unity or Unreal for agent-led game development: an editor, scene tree, runtime, assets, exports, and local diagnostics.

MCP gives your AI agent a controlled bridge into the running engine. Through 44 tools, it can create scenes, add nodes, set properties, run the game, inspect errors, and import or generate assets instead of only editing files blindly.

What does the CLI do?

The summer-engine CLI downloads the desktop app, signs you in, writes the MCP config for Claude Code, Cursor, Codex CLI, Devin Desktop, Gemini CLI, LM Studio, Kilo Code, and other agents, installs the game-dev skills, creates projects, runs them, and checks that everything is connected.

Can I use a free local model instead of a subscription?

Yes. Run a model on your own GPU with Ollama or LM Studio and connect it through the same MCP server. Engine control and asset search stay free; cloud generation uses credits. See the Ollama, LM Studio, and Goose guides for the setups that actually work in 2026.

Can games made with Summer ship?

Yes. Summer projects are real game projects. The goal is not a toy prototype in chat; it is a game you can run, test, export, and ship across desktop, mobile, web, Steam, and console pipelines as the product matures.

Is Summer Engine free?

Yes. Summer Engine is free to download and start using. The CLI, MCP server, skills, hooks, and plugin manifests are MIT open source. Heavy hosted AI and cloud generation features use credits. See /source-status for the exact open, free, and paid split.

Summer Engine MCP

Crie jogos reaisno Claude Code.

Conecte Claude Code, Cursor, Codex ou Devin Desktop a um engine de jogo desktop real — ou rode um modelo local gratuito com Ollama ou LM Studio. Use o plano de IA que você já tem, rode o jogo localmente e exporte projetos para Steam, PC, Mac, mobile e pipelines de console.

Uso grátis com MCPSeu plano de IA ou um modelo local grátisLance projetos de jogo reais

Baixar app desktop Ler docs de MCP

Agent guides

Como criar jogos no Claude Code, Cursor e mais

Claude Code Cursor Codex CLI Devin Desktop Gemini CLI CCline

What it is

Um engine desktop que seu agente consegue operar de verdade.

Summer Engine é grátis para uso com MCP.

Abra Claude Code, Cursor, Devin Desktop — ou rode um modelo local gratuito com Ollama ou LM Studio.

Use sua assinatura de IA atual para criar jogos reais dentro do Summer Engine.

Rode, teste e exporte projetos para Steam, PC, Mac, mobile e pipelines de console.

Como funciona

1. Download the engine

Install the Summer Engine desktop app. This is where the scene tree, runtime, assets, and exports live.

2. Set up MCP

Run the CLI setup command. It writes the agent config, installs skills, and connects to the local engine API.

3. Build with your agent

Claude Code, Cursor, and other MCP clients get 44 engine tools for real game development.

Jogável, não imaginário

Sua assinatura de IA escreve. Summer mostra o jogo.

Por que parece diferente

Seu agente para de adivinhar e começa a usar o engine.

Claude Code, Cursor e Devin Desktop já escrevem código. Summer dá a esse código um engine de jogo real: abrir a cena, posicionar objetos, rodar o projeto, inspecionar erros e repetir até o loop ficar jogável.

Agent guides