LangGraph.js v0.2.0, a JavaScript/TypeScript framework for building LLM-powered agents, introduces new features such as flexible streaming modes, a built-in checkpointing system, and first-class human-in-the-loop support. It also supports parallel node execution and integrates with LangGraph Studio, an IDE for debugging, and LangGraph Cloud for scalable deployment. These advancements enhance the responsiveness, resilience, and access control of applications, making it easier for developers to build, debug, and deploy reliable agents. The framework is compatible with multiple JavaScript runtimes, and its integration with LangGraph Cloud allows for easy scaling and management of high-traffic agents. LangGraph.js is already being used by AI teams for rapid feature deployment and is available for free during its beta phase on LangSmith. The development team actively seeks community feedback to continue improving the framework.