This book provides a comprehensive guide to building LLM-poweredapplications using LangChain TypeScript. Covering everything from basic conceptsto advanced patterns, it includes detailed explanations of agents, models, tools,memory management, middleware, and production deployment strategies.

This book provides a comprehensive guide to building AI applications with LangChain.It covers essential concepts including chat models, message systems, tools, memory,RAG architectures, agent development, middleware, streaming, guardrails, and LangGraph.The book also includes practical examples for building customer service systems,research assistants, code assistants, and multi-agent collaboration systems.