LangChain overview for Node.js

LangChain.js is a framework for LLM applications in TypeScript and Node.js. It standardizes how you wire prompts, models, tools, document loaders, embeddings, and retrievers into reusable pipelines and agents. LangChain, Deep Agents, LangGraph, and LangSmith Project Role LangChain High-level APIs: LCEL chains, createAgent, loaders, retrievers Deep Agents Batteries-included agent harness: planning, subagents, filesystem, context management LangGraph Low-level orchestration;...