LLM Memory Engineering: Practical Strategies for Long-Term Memory in AI Agents and LLM Workflows

Modern LLMs forget by default. This book shows you how to make them remember. LLM Memory Engineering is your practical blueprint for building AI agents and applications with long-term, persistent memory-so your models can recall, reason, and evolve across time. Written by a seasoned AI engineer with hands-on experience in building memory-augmented agents, this book goes far beyond theoretical explanations. You'll get field-tested patterns, production-grade implementations, and insights drawn from real-world LLM deployments using LangChain, LlamaIndex, Chroma, Weaviate, and Pinecone. About the Technology: Today's large language models, while powerful, are inherently stateless. They respond based on the current prompt alone-unless you equip them with external memory systems. This book bridges that critical gap. Whether you're building an AI assistant, a personalized tutor, or a long-running agent system, memory matters. Technologies like vector databases, embedding retrievers, summarizers, and LangChain's modular memory interfaces are the foundation of truly intelligent LLM workflows. What's Inside: You'll learn how to design memory pipelines, store episodic and semantic memory, customize prompt injection, and scale memory systems for production. From chunking and retrieval to compression and auditing, the book guides you through every layer of memory engineering: Vector search with FAISS, Chroma, Pinecone, Weaviate Retrieval-Augmented Generation (RAG) with persistent memory LangChain and LlamaIndex memory modules explained and applied Memory summarization, relevance scoring, and garbage collection Compliance, data minimization, and secure memory design Real-world use cases: research agents, companions, support bots, and more Who This Book Is For: Whether you're an AI engineer, backend developer, data scientist, or product team working on intelligent applications, this book is written for you. No deep ML background is required-only curiosity and the desire to build smarter, context-aware systems. LLMs are evolving rapidly-and so are expectations for what they can remember. If you're not already working with memory-augmented architectures, you're behind. Don't let your AI product stall at session-level intelligence. Start building agents that remember, adapt, and improve. This isn't just a book-it's a complete engineering guide. You're not only learning how memory works, you're getting battle-tested techniques, best practices, reusable prompts, deployment patterns, and architectural blueprints that can save you months of R&D. If you're serious about building AI that goes beyond the prompt-AI that remembers, reasons, and grows with its users-then this book is your toolkit. Start mastering LLM memory engineering today and shape the future of intelligent agents.