The Agentic AI Stack is the foundation behind today’s smartest autonomous AI agents. Unlike simple chatbots, these agents can think, remember, and act—thanks to a layered stack of LLMs, memory systems, tool libraries, and secure execution environments. This beginner-friendly guide breaks down the entire stack as of November 2024, so you can confidently build or deploy your own intelligent agents using the latest tools like LangChain, Letta, Chroma, OpenAI, and more.