langchain
Installation
SKILL.md
LangChain Skill
Expert assistance for the langchain Python package's new agent API: create_agent() — a high-level factory that builds a LangGraph-backed agent with composable middleware for cross-cutting concerns (HITL, PII, fallback, limits, summarization, etc.).
Install: pip install -U langchain
Reference: references/api.md (500 KB — full API reference).