---
title: ReAct From Scratch
emoji: 🧠
colorFrom: blue
colorTo: indigo
sdk: gradio
sdk_version: 4.44.0
python_version: "3.11"
app_file: app.py
pinned: false
---

# ReAct from scratch

A Reasoning + Acting agent built from first principles, with a transparent
step-by-step trace. Bring your own [OpenRouter](https://openrouter.ai/keys) key.

Source & write-up: https://github.com/shenmali/agentic-ai-first/tree/main/demos/01-react-from-scratch