“LangChain”

JavaScript and TypeScript framework of interoperable components for building LLM apps and agents, with LangGraph.js and Deep Agents above it.

Open-source agent harness from LangChain for building agents with code, with LangSmith for testing and monitoring.

Opinionated agent harness on LangGraph with sub-agents, filesystem access, context management, persistent memory and approval of tool calls.

The batteries included agent harness.

Python platform that gives agents a cryptographic identity, A2A communication and x402 payment requirements behind one bindufy() call.