Agentic Patterns #5: ReAct | The Agent Loop Explained

Published: 27 November 2025
on channel: AI TL;DR

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This is the pattern that started the Agent Revolution. Pattern #5 is ReAct (Reason + Act).

We break down the fundamental loop—Thought, Action, Observation—that allows LLMs to use tools, search the web, and interact with the real world using APIs.

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