LangChain Changelog

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March 2025

Prompt engineering LangGraph Studio

You can now view and edit your node logic (such as prompts) directly within the Studio UI. See which nodes use specific assistant fields and edit them...

LangGraph BigTool for providing agents access to a large number of tools

langgraph-bigtool is a Python library for creating LangGraph agents that can access large numbers of tools. Key features include: • Scalable access to tools:...

LangGraph Swarm for building multi-agent systems

We now have a lightweight library for building swarm-style multi-agent systems with LangGraph. Key features include: The library is available via pip install...

LangGraph 0.3: Pre-built agents

LangGraph has always been about giving full control over your AI agents—no hidden prompts, no enforced architectures. But we also know that getting started...

MCP Adapters for LangChain and LangGraph

The LangChain MCP Adapters is a package that makes it easy to use Anthropic Model Context Protocol (MCP) tools with LangChain & LangGraph. It: Why use MCP...

February 2025

LangGraph Supervisor: A Library for Hierarchical Multi-Agent Systems

We've released LangGraph Supervisor, a new lightweight Python library that simplifies building hierarchical multi-agent systems with LangGraph. Key features...

February 26, 2025

useStream for integrating LangGraph for your React app

You can now integrate LangGraph into your React application with a single hook. Thread and state management, messages streaming and branching built-in. See...

February 21, 2025

LangMem SDK for long-term agent memory

The LangMem SDK is a lightweight Python library that helps your agents learn and improve through long-term memory. It provides tooling to extract information...

February 20, 2025

LangSmith LangGraph

LangSmith Playground integration with LangGraph Studio

You can now open LLM runs from LangGraph Studio in the LangSmith Playground, making it easier to debug, visualize, and refine your agents. This is an early...

February 8, 2025

January 2025

Functional API for LangGraph

LangGraph’s powerful state management— including short- & long-term memory, human-in-the-loop, and time travel — just got even more flexible. With the new...

January 29, 2025

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