LangChain Skill

Use this skill when working with LangChain for building LLM-powered applications.

📚 Documentation Lookup (Context7)

Always verify patterns with latest docs:

mcp_context7_resolve-library-id(libraryName="langchain", query="LCEL chains")
mcp_context7_query-docs(libraryId="/langchain-ai/langchain", query="RunnablePassthrough examples")

Core Concepts

1. LLMs and Chat Models

from langchain_openai import ChatOpenAI
from langchain_anthropic import ChatAnthropic