A browser-based tool that lets multiple AI models collaborate on your code. Describe what you want to build. Three modes handle the rest: 🔍 Review Mode — one model codes, another reviews and corrects it 🏗️ Companion Mode — one model architects, the other implements ⚔️ Challenge Mode — both models compete, results shown side by side Supports Gemini, ChatGPT and Claude Sonnet. No backend. Your API keys never leave your browser. 100% open source.