Building LLM Applications using LangChain
Chapter 1: Introduction to the LangChain Framework
The Motivation for a Framework
LangChain's Core Architecture
Setting Up Your Development Environment
Your First LangChain Application
Chapter 2: Models, Prompts, and Parsers
Interfacing with LLMs and Chat Models
Managing Prompts with PromptTemplates
Implementing Few-Shot Prompting
Structuring Output with Parsers
Hands-on Practical: Building a Structured Data Extractor
Chapter 3: Constructing Chains for Sequential Operations
Fundamentals of Chains
Using the Simple LLMChain
Creating Sequential Chains
Implementing Conditional Logic with Router Chains
Hands-on Practical: A Content Generation Pipeline
Chapter 4: Memory for Conversational Applications
The Importance of State in Conversations
Buffer Memory for Short-Term Recall
Summarization Memory for Long Conversations
Using Windowed and Token-Based Memory
Adding Memory to Chains and Agents
Practice: Building a Chatbot with Memory
Chapter 5: Data Connection for Retrieval Augmented Generation (RAG)
Architecture of a RAG System
Loading Data with Document Loaders
Splitting Documents for Processing
Vector Stores and Embeddings
Fetching Data with Retrievers
Building a Question-Answering Chain
Hands-on Practical: Q&A over Your Documents
Chapter 6: Developing Autonomous Agents
Introduction to Agents and Tools
The Agent, Tool, and Toolkit Architecture
Using Built-in Tools
Creating Custom Tools
Exploring Agent Types and Executors
Hands-on Practical: A Web-Searching Agent
Buffer Memory for Short-Term Recall
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- Memory, LangChain, 2025 (LangChain Inc.) - Official documentation for LangChain's memory module, detailing how
ConversationBufferMemoryand other memory types are implemented and used. - Prompt engineering, OpenAI, 2024 (OpenAI) - Explains fundamental principles of prompt engineering and managing context for OpenAI's language models, which directly relates to the context window limitations discussed.
- Building LLM-Powered Applications: Learn to use Large Language Models for tasks like chatbots, summarization, and content creation, Josh Starmer, 2023 (Packt Publishing) - Provides practical insights into architecting and implementing LLM applications, including strategies for managing conversational state and context, which are fundamental to memory concepts like
ConversationBufferMemory.