LangChain Fundamentals

This introductory course provides a foundational guide to LangChain—an open-source framework designed to connect Large Language Models (LLMs) to data, tools, memory, and APIs. Intended for beginners the presentation outlines core framework components including prompts, models, output parsers, document loaders, text splitters, and retrievers. Key topics cover structuring end-to-end applications using LangChain Expression Language (LCEL), managing conversation memory, and deploying tools and autonomous agents. The material emphasizes practical implementation by detailing best practices, common developer pitfalls to avoid, and essential ecosystem tools like LangSmith and LangGraph. Finally, learners are guided through interactive exercises and a hands-on capstone project to build a complete Retrieval-Augmented Generation (RAG) document chat app.