Developer Discovers Her AI Agent Unknowingly Used the ReAct Framework All Along

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A developer enrolled in the AWS AI & ML Scholars Agentic Engineer Nanodegree encountered the term ReAct, initially confusing it with Meta's frontend library React, open-sourced in 2013. ReAct, introduced in a 2022 research paper by Shunyu Yao and collaborators, is an AI reasoning pattern that combines reasoning, acting, and observation in a continuous loop. The developer later realized she had independently implemented this same loop in Verity Lex, a tool she built during OpenAI Build Week to assess court readiness for AI adoption. Verity Lex navigates unstructured court websites by searching, observing results, reasoning about findings, and deciding the next action — mirroring the ReAct framework without her knowing it had a name. The experience highlighted how developers often apply established AI patterns in practice before formally learning the concepts behind them.

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