LangChain OSS

@LangChain_OSS

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

Joined January 2026

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LangChain OSS
@LangChain_OSS
2h
MCP usage is growing... and growing fast! check out our latest blog on our revamped support for MCP and the new, stateless spec!
Sydney Runkle
@sydneyrunkle
2h
ICYMI -- yesterday we released support for the new MCP protocol in @LangChain !! what do you need to know? 1. MCP support is now in the main langchain package! get started with `uv pip install 'langchain[mcp]'` 2. it's now built on top of FastMCP v4; FastMCP has ergonomic
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LangChain OSS
@LangChain_OSS
Aug 28
new MCP spec support is coming soon in @LangChain (and deepagents) try it out and let us know what you think!
Sydney Runkle
@sydneyrunkle
Aug 28
we're adding support for the new MCP spec in @LangChain open source! the new API is built on top of FastMCP, so you can take advantage of their excellent devx for building MCP servers and clients. an early version is available in langchain==1.4.0a2; let us know what you think!
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LangChain OSS
@LangChain_OSS
Aug 20
What's new in LangChain? 🚀 🧯 Standard exceptions: chat models now raise standard exception types across providers, so you can distinguish retryable errors (timeouts, rate limits, etc.) in a consistent way. Fully backward compatible. 🧩 Agent middleware: custom token_counter
github.com
syyy44 - Overview
syyy44 has 7 repositories available. Follow their code on GitHub.
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LangChain OSS
@LangChain_OSS
Aug 14
What's new in LangChain? 🚀 🔌 Support for OpenAI's 3.0 SDK (using httpx2) ✨ Support for gemini-3.7-flash Plus a wave of core reliability fixes from external contributors: 🛠️ Tool calling & structured output: clearer errors, respect for pydantic aliases when validating tool
github.com
RinZ27 - Overview
RinZ27 has 196 repositories available. Follow their code on GitHub.
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LangChain OSS
@LangChain_OSS
Aug 11
New langchain python release! 🚀 Highlights: • Internal middleware model calls no longer leak into messages / event stream (github.com/devbyteai, reported by github.com/nick-youngblut) • SummarizationMiddleware retries failed summaries (reported by github.com/Harshxth) +
github.com
devbyteai - Overview
AI Engineer & Full-Stack Developer Building autonomous agents, scalable platforms, and intelligent systems. - devbyteai
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