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AI Agent Architecture — ReAct, Memory, Planning and Multi-Agent Systems · AI Agent — Architecture, Not a Chatbot

Native LLM Limitations: No Memory, Finite Context, No World Access

AI Agent — Architecture, Not a Chatbot

Introduction

Before building an agent, you must understand what an LLM does natively and what it does not. This lesson systematises three fundamental limitations: statelessness (no state between calls), finite context window (the token window is a finite resource), and no world access (knowledge frozen at training date). Each limitation has architectural implications for agent design.