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

制作真实游戏就在 Claude Code。

把 Claude Code、Cursor、Codex 或 Devin Desktop 连接到真正的桌面游戏引擎——也可以用 Ollama 或 LM Studio 运行免费的本地模型。继续使用你已有的 AI 方案，在本地运行游戏，并导出面向 Steam、PC、Mac、mobile 和主机流程的项目。

免费使用 MCP现有 AI 方案或免费本地模型发布真实游戏项目

下载桌面应用阅读 MCP 文档

Agent guides

如何在 Claude Code、Cursor 等工具中制作游戏

Claude Code Cursor Codex CLI Devin Desktop Gemini CLI CCline

What it is

一个你的 agent 真正能操作的桌面引擎。

Summer Engine 可免费用于 MCP。

打开 Claude Code、Cursor、Devin Desktop——或者用 Ollama、LM Studio 运行免费的本地模型。

用你现有的 AI 订阅，在 Summer Engine 里创建真正的游戏。

运行、测试并导出面向 Steam、PC、Mac、mobile 和主机流程的项目。

如何工作

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.

可玩，不是假装

你的 AI 订阅负责写。Summer 展示游戏。

为什么感觉不一样

你的 agent 不再猜测，而是开始使用引擎。

Claude Code、Cursor 和 Devin Desktop 已经会写代码。Summer 给这些代码一个真正的游戏引擎：打开场景、放置物体、运行项目、检查错误，然后重复，直到游戏循环可以玩。

Agent guides