langchain - Build LLM applications using LangChain.
Build LLM applications using LCEL chains, RAG pipelines, and LangGraph agents.
Tags
Updated: 2026-09-20Capabilities
Typical Inputs
Typical Outputs
What this skill does
- Build LCEL chains
- Implement RAG pipelines
- Create LangGraph agents
- Configure LangSmith tracing
- Deploy via LangServe
Inputs
- Document data sources
- Agent tool definitions
- Model provider integration packages
- LANGCHAIN_TRACING_V2 environment variable
Outputs
- LCEL chain execution outputs
- RAG pipeline responses
- Agent execution states
- LangSmith trace logs
Requirements
- Python environment
- LangChain v1.0 or higher
- LangGraph runtime