Building a software product entirely with AI-generated code: A team's experiment with Codex
By
pramodbiligiri
Pure flour-power. Hearty enough to carry you through lunch.
Summary
Ryan Lopopolo describes an experiment where his team built and shipped an internal beta software product using entirely AI-generated code (Codex), with zero lines manually written by humans. The product has real users, ships, deploys, breaks, and gets fixed — all with code written by an AI agent. The team estimates they built it in about 1/10th the time it would have taken manually. The article explores the paradigm shift where humans steer and agents execute, discussing the implications of agent-first software engineering.
Key quotes
· 3 pulledWe estimate that we built this in about 1/10th the time it would have taken to write the code by hand.
Humans steer. Agents execute.
Every line of code—application logic, tests, CI configuration, documentation, observability, and internal tooling—has been written by Codex.
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