LangChain

Overview

Build production-grade LLM applications using LangChain's composable framework. This skill covers chains, agents, retrieval-augmented generation (RAG), tool integration, memory, and deployment — using modern LCEL patterns (not legacy LLMChain).

Instructions

Step 1: Project Setup

Determine the user's runtime (Python or TypeScript) and initialize the project:

Python:

pip install langchain langchain-core langchain-openai langchain-community
# For RAG:
pip install langchain-chroma sentence-transformers
# For document loading:
pip install unstructured pypdf docx2txt