Free vibe coding in VS Code. An agent in the sidebar of VS Code, Cursor and Windsurf. Describe it; the agent builds it, runs it and checks it.
Install in one step
Search for MegaBrain in the Extensions view, or run code --install-extension megabrain.code-factory. Cursor and Windsurf install it from Open VSX. It needs VS Code 1.105 or later, or a fork built on it.
Build from the sidebar
Describe the change in the MegaBrain panel. The agent reads your workspace, edits the files it needs, runs your commands and tests, and hands you the diff to review.
One plan for every editor
The extension, the CLI, the JetBrains plugin and the Mac app share one sign-in and one plan.
Free to start
Free costs nothing and needs no card: the agent in your terminal, your editor and the Mac app, the free models, and your own API keys and local models (Ollama, LM Studio) with no limits from us. Paid plans start at $8 a month (Plus) and go up to $200 (Ultra). They include GLM, Kimi, MiniMax, DeepSeek, Qwen, Grok and Auto with a session limit and a weekly limit you can always see; from Pro ($30) Claude, GPT and Gemini are paid from credits.
Questions
Is there a free vibe coding extension for VS Code?+
Yes: MegaBrain, on the free plan, from the VS Code Marketplace. Cursor and Windsurf install it from Open VSX.
Does it work in Cursor and Windsurf?+
Yes. Both install extensions from Open VSX: search for MegaBrain in the Extensions view. The CLI also runs in their built-in terminal.
Which models can I use in VS Code?+
90+ models through one plan: the free models on Free, the included models such as GLM, Kimi and MiniMax on the paid plans, Claude, GPT and Gemini from Pro, any model through your own API key, and local models.
Do I need an API key?+
No. Sign in once and the free models work without one. Keys of your own for OpenAI, Anthropic, Google or another provider work too, at no cost from us.
How do I start?+
Install the extension (code --install-extension megabrain.code-factory), open the MegaBrain panel and sign in once.
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