The project uses Wechaty to scan and log into WeChat, then routes incoming IM messages to various LLM providers for processing and response generation. It supports multi-model routing across ChatGPT, DeepSeek, Ollama, Claude, and Pi, enabling auto-reply functionality and AI-powered analysis of group chats and friend relationships. Additional features include local caching of Moments, contact/group member management, and integration with Lark IM.