Rig is a Rust library for building LLM-powered applications with over 5,000 GitHub stars. The maintainer demonstrates how to create AI agents in Rust, implement tools, and even run Python code from Rust using PyO3. The framework supports 20+ AI providers, focuses on idiomatic Rust integration, and enables building scalable agent systems. A live coding session shows creating a simple agent with tools and a recursive language model that generates Python Flask applications.