LangGraphvsChatDev

LangGraph is LangChain's stateful agent and multi-agent framework that models agent workflows as directed graphs — enabling complex cycles, human-in-the-loop checkpoints, and persistent state across agent sessions. It has become the go-to framework for enterprise agent applications requiring production-grade reliability, observability, and complex workflow management. LangGraph Cloud offers managed hosting with built-in deployment, scaling, and monitoring.

ChatDev is a research project from OpenBMB (Tsinghua University) that demonstrates a virtual software company where multiple LLM agents with distinct roles — CEO, CTO, programmer, reviewer, tester — collaborate to build software from a single natural language requirement. It explores how software engineering processes can be fully automated through role-playing agents and structured communication protocols. ChatDev remains an influential research artifact and educational tool for understanding multi-agent systems.