by Amit Shekhar · 30 April 2026
ReAct Agent
The ReAct Agent - what it is, how it is built, its anatomy, how it thinks and acts, and how to handle its common failure modes.
Read on Outcome School ↗then come back to lock it in
Before you read, guessWhat are the five essential components of a ReAct Agent, without which it ceases to exist?
Ten seconds, a guess, then read — a wrong guess still makes the answer stick.
What this article covers
- What is a ReAct Agent
- ReAct Agent vs AI Agent
- Anatomy of a ReAct Agent
- The ReAct Prompt Template
- How a ReAct Agent Thinks and Acts
- A Full Trace Example
- Implementing a ReAct Agent
- Common Failure Modes and How to Fix Them
The article lives on outcomeschool.com. Read it there, then come back: the tutor in the margin has read it and will answer questions, and the questions below check what stayed.