What is Summer Engine?

Summer Engine is a real desktop game engine for agent-led game development: an editor, scene tree, runtime, assets, exports, and local diagnostics. You build and run a Summer game inside the engine instead of stopping at files generated in a chat window.

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 be exported?

Summer projects can be run and tested locally. Export availability depends on the installed target templates and toolchains; signing, store review, and submission remain creator-controlled.

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 um agente de IA ou modelo local compatível ao Summer Engine. Use o plano de IA que você já tem para criar, executar e testar um jogo Summer localmente; a exportação ainda depende dos templates e toolchains do destino.

or run the CLI directly

Uso grátis com MCPSeu plano de IA ou um modelo localCrie jogos Summer jogáveis

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.

Conecte um agente de IA ou modelo local compatível.

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

Execute e teste jogos Summer localmente; exportações exigem os templates e toolchains do destino.

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