GH Repository · langchain-ai

langchainjs

The agent engineering platform

Open on GitHub ↗created 2023-02-06updated 2026-09-17read 2026-09-17

stars: 18,198
30-day movement: +134/day
Related entries: 1
Connections: 3

node/pnpmnodedenootherTypeScript

langchainjs is the LangChain JavaScript/TypeScript repository, described by its authors as 'the agent engineering platform'. It is a TypeScript codebase developed by LangChain AI and distributed under the MIT license.

Reach for it when you want to build agents in JavaScript or TypeScript on an established, MIT-licensed platform.

Use it to

Build agents in TypeScript
Explore the LangChain JS codebase
Contribute via the provided devcontainer
Follow repo conventions with AGENTS.md
Audit the MIT-licensed source

For JavaScript and TypeScript developers building LLM agents

Role: other
Language: TypeScript
Licence: MIT
Forks: 3,374
Open issues: 227
Last push: 2026-09-17
Latest release: 0.0.147 · 2023-09-12

topicsagentstypescriptjavascriptllmdeveloper-toolsmit-license