LangSmith Evals in JavaScript LangSmith now supports a native `runOverDataset` method for evaluating your JavaScript LLM applications! You can configure custom or off-the-shelf evaluators to compare + score the the outputs of your app against ideal reference outputs.
@langchain
-

LangGraph Financial Agent with Polygon API Integration
By
–
LangGraph Financial Agent w/ Polygon A combo of our two favorite things – LangGraph and agent toolkits Big s/o to @virattt for adding this awesome example of creating a LangGraph agent that has access to Polygon APIs to access financial data Code: https://
gist.github.com/virattt/4d764c
427892ce9fdf4534209edfb1f4
… -

LangChain Releases LangGraph Updates and New astream_events Method
By
–
New release notes! Catch up on everything LangChain related over the past two weeks, including: LangGraph
LangChain v0.1
LangSmith updates
New astream_events method
Revamp of key use case pages! Blog: https://
blog.langchain.dev/week-of-1-22-2
4-langchain-release-notes/
… -

Mental Health App Built as LLM State Machine
By
–
Mental Health Therapy as an LLM State Machine In this new guest blog, @Sonia_Health shares more about how they are developing their app Excited to highlight this for two reasons: App with really positive societal benefit
Built as a state machine – which matches our -
LangChain Hacking Hours Event – Meet the Team
By
–
Friday Fun Time! Come join us for hacking hours later today! Meet the team, meet others building in the space, and build some cool stuff with LangChain, LangGraph, LangSmith, LangServe, Lang?? RSVP:
-

10 Lessons Building AI Chatbot Using Retrieval-Augmented Generation
By
–
10 Lessons from Developing an AI Chatbot Using Retrieval-Augmented Generation A great blog from @fiddlerlabs goes through ten lessons learned when building a chatbot using RAG Covers a LOT of content – check it out! https://
fiddler.ai/resources/10-l
essons-from-developing-an-ai-chatbot-using-retrieval-augmented-generation
… -

Mendable Leverages LangSmith Debug Tools Actions
By
–
How Mendable leverages LangSmith to debug Tools & Actions @mendableai recently launched "Tools & Actions" – to enable their assistants to take actions Blog Link: https://
blog.langchain.dev/how-mendable-l
everages-langsmith-to-debug-tools-actions/
… What are some learnings along the way? "One of the biggest problems when building -
LangGraph Hacking Hours in SF This Friday
By
–
We're doing hacking hours this Friday in SF! Specifically focused on **LangGraph** – so we expect cool agents (or multi agents) to be built! Will try to record any demos at the end to share remotely RSVP:
-

LangGraph Multi-Agent Workflows: Collaboration and Supervision
By
–
LangGraph for Multi-Agent Workflows We pushed a bunch of examples of using LangGraph to construct multi-agent workflows. These include: Multi-Agent **Collaboration** – having agents work on the same scratchpad of messages Agent **Supervisor** – using and LLM to
-

SQL Agent Toolkit Updates Enable Natural Language Database Queries
By
–
Agent Toolkits: SQL Agents offer a natural language interface over SQL DBs: The agent converts natural language questions to SQL SQL query is executed by the agent
The agent summarizes results from SQL query execution We've recently updated our SQL agent toolkit
