Summer Engine MCP guide
How to make games in Devin Desktop with Summer Engine
Connect Devin Desktop (formerly Windsurf) to Summer Engine and let it build real game projects with scene operations, Play mode, and diagnostics. Summer Engine is the desktop game engine; Devin Desktop is the agent that drives it through MCP.
Summer is free for MCP use
Download the desktop engine and connect it to your agent. You are not paying Summer for the AI calls your existing subscription already covers.
Open Devin Desktop
Use the AI editor you already have. The setup command writes the MCP config and installs the Summer game-dev skills.
Run a Summer game
The agent writes code. Summer Engine shows the Summer game, runs Play mode, and helps inspect errors. Export still requires the target templates and toolchains.
Install
Connect Summer to Devin Desktop
- 1
Install Summer Engine
Downloads the desktop engine app, about 1 GB. Skip it if Summer Engine is already installed, or if you only need assets and video for a game built in another engine.
- 2
Sign in
Opens your browser once. The CLI and the engine share the session.
- 3
Connect Devin Desktop
Writes the summer-engine MCP config and installs the Summer game-dev skills.
- 4
Restart and build
Restart Devin Desktop (formerly Windsurf) and refresh MCP servers from the agent settings. Devin's docs say mcp_config.json configures the Cascade agent; for the Devin agent add the server in the app's MCP settings with the same command.
Why this matters
Devin Desktop writes with your subscription. Summer Engine shows the game.
A chat agent alone can write files. With MCP, Devin Desktop gets tools for the running game engine, so it can inspect the project, run commands, and make changes that become playable inside Summer.