LangChain JS

LangChain

@LangChain_JS

Ship great agents fast with our open source JS frameworks – LangChain, LangGraph, and Deep Agents. Maintained by @LangChain.

langchain.com Joined January 2026

16 Following 2.5K Followers 251 Posts

Latest posts 5

LangChain JS @LangChain_JS Oct 1

@𝚕𝚊𝚗𝚐𝚌𝚑𝚊𝚒𝚗/𝚖𝚌𝚙-𝚊𝚍𝚊𝚙𝚝𝚎𝚛𝚜 2.0 is out! 🧵

Using MCP with your TypeScript agents up to MCP servers just got a lot simpler: support for the latest stateless version of MCP, tools that can check in with your users when they need something, much easier auth integrations, and a ton of QoL updates.

Here's what's new 👇

LangChain JS @LangChain_JS Aug 27

🧑‍🍳

Christian Bromann Verified account @bromann Aug 27

Starting today, @LangChain’s Managed Deep Agents can bake your agent’s environment at deploy time. 🧑‍💻

No clone. No install. No repeated setup.

Drop in setup.sh or a Dockerfile. Bake once. Every new thread starts ready. 👇

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LangChain JS @LangChain_JS Aug 24

You deploy, we provision! 🤝

Christian Bromann Verified account @bromann Aug 24

Starting today, a @LangChain's Managed Deep Agent deploy provisions your Slack app for you 🤯

No manifest. No OAuth redirects. No bot tokens to copy around.

One command, and your agent says 👋 in Slack.

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LangChain JS @LangChain_JS Jun 26

code reviews can be beautiful ❤️ thanks @shadcn!

Christian Bromann Verified account @bromann Jun 26

Plugged the new @shadcn chat components into @LangChain_JS Deep Agents and one-shotted a full code review agent.

One reviewer per file, local sandbox, streaming live. Wild how fast this was 😍

🧑‍💻 full demo: github.com/langchain-ai/s…

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LangChain JS @LangChain_JS Jun 25

Agents are easy to demo locally. The hard part is shipping them inside a real app.

We published a deployment cookbook for @LangChain agents: full-stack examples with streaming UI, subagents, thread history, and production persistence notes across common JS frameworks 🚀

🧵👇