AI Agent Architecture — ReAct, Memory, Planning and Multi-Agent Systems · AI Agent — Architecture, Not a Chatbot
The Agent Loop: Observe → Think → Act → Observe
AI Agent — Architecture, Not a Chatbot
Introduction
ReAct (Reasoning + Acting) is the most popular agent loop pattern. This lesson breaks it down into components: what the scratchpad looks like, how the LLM generates Thought/Action/Observation, how the loop detects the termination condition, and what happens when a step fails. Pseudocode and concrete prompt format examples.