LangChain Changelog

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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

December 2024

🔁 Modify graph state from tools in LangGraph

LangGraph's latest update gives you greater control over your agents by enabling tools to directly update the graph state. This is a game-changer for use...

December 18, 2024

`interrupt`: Simplifying human-in-the-loop agents

Our latest feature in LangGraph, interrupt , makes building human-in-the-loop workflows easier. Why Human-in-the-Loop? Agents aren’t perfect, so keeping...

December 16, 2024

🤖 Command in LangGraph to build edgeless graphs & multi-agent workflows

We've released Command , a new tool in LangGraph that lets you manage dynamic, edgeless agent flows. Now, nodes can dynamically decide which node to execute...

December 10, 2024

LangGraph LangGraph Platform

🔍 Semantic search for LangGraph's long-term memory

With semantic search for LangGraph’s long-term memory, your agents can now find relevant memories based on meaning , not just exact matches — making it...

December 6, 2024

November 2024

🤖 LangGraph Agent Protocol + LangGraph Studio for local execution

We’ve taken a big step toward our vision of a multi-agent future by making it easier to connect and integrate agents— regardless of how they’re built. We've...

November 26, 2024

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