nanobot is an ultra-lightweight personal AI assistant developed by HKUDS (Data Intelligence Lab at the University of Hong Kong) that delivers core agent functionality in approximately 4,000 lines of Python code — 99% smaller than OpenClaw's 430,000+ lines. Released on February 2, 2026, it has rapidly grown to over 36,000 GitHub stars. The framework integrates with 8+ messaging platforms including Telegram, Discord, WhatsApp, Slack, Feishu, DingTalk, Email, and QQ, and supports 11+ LLM providers including OpenRouter, Anthropic, OpenAI, DeepSeek, Google Gemini, and Ollama through an extensible Provider Registry that enables adding new providers in just 2 steps. Recent updates include replacing litellm with native OpenAI and Anthropic SDKs (March 21), an interactive setup wizard (March 20), and expanded provider support with Ollama, VolcEngine, and BytePlus (March 19). The project features a modular skills system, conversation memory management, scheduled task execution, and is designed to be research-ready with clean, readable code that a single developer can fully understand.