LangGraph is a framework for building AI agents, gaining traction with companies such as Replit, Klarna, LinkedIn, and Uber. It prioritizes being low-level, without hidden prompts or cognitive architectures, making it production-ready and distinct from other frameworks. To balance this, LangGraph also offers higher-level abstractions, including a new prebuilt package, `langgraph-prebuilt`, which includes tools like `create_react_agent` for creating simple tool-calling agents, as well as prebuilt agents for tasks such as reliable structured extraction, supervisor multi-agent architecture, long-term memory, and swarm multi-agent architecture. These prebuilt libraries aim to make it easy to get started with common agent patterns while being built on top of LangGraph, allowing for modifications and community-driven development.