LangChain

LangChain tutorials for JavaScript, covering agents, tools, and building LLM-powered apps with small, runnable examples.

Published on
June 26, 2026
LangChain JS agent with a custom tool
Create a small LangChain JavaScript agent with one custom tool using createAgent, tool, and a Zod schema, with a runnable end-to-end example.
javascript snippets langchain agents llm