Ruby on Rails creator DHH stops hand-writing code after 25 years, says AI agents now do the typing

David Heinemeier Hansson, the programmer who built Ruby on Rails and has written production code by hand for a quarter century, says he has stopped. Speaking at Rails World 2026, he told the audience he has not typed a single line since March. The admission marks a sharp turn for one of the industry's most influential working developers, who as recently as a year ago was publicly pushing back against AI-assisted coding.

His new position is blunt. "English is a better programming language than Ruby," he said on stage, describing natural-language instructions to AI agents as a more effective way to build software than the syntax he spent 25 years promoting. He called the shift the biggest thing to happen in the history of computing — a claim that carries weight coming from someone whose framework still underpins thousands of production applications and a large chunk of the modern web stack.

The about-face is notable because DHH was not a quiet skeptic. Throughout 2025 he argued that handing code generation to models produced sloppy, hard-to-maintain work and eroded the craft of programming. His defection to an agent-driven workflow removes one of the loudest holdouts from the anti-AI camp and gives vendors a marquee reference: the author of Rails now ships by describing intent in English rather than writing Ruby.

What he is actually doing day to day remains partly opaque. He did not detail which models or agent tools he uses, how much of his output is reviewed by humans, or how the Rails codebase itself is changing as a result. Those gaps matter, because the argument over AI coding has moved from whether it can write working code to whether it can maintain large, long-lived systems without accumulating defects that no one understands.

For the Rails community, the remarks land at an awkward moment. The framework's pitch has long been developer happiness and readable, convention-driven code — values that assume a human is reading and writing it. If contributors increasingly direct agents instead of editing files, the project's review culture, documentation standards and even its hiring pipeline will have to adapt, and there is no consensus yet on how.

Watch for two things. First, whether DHH publishes specifics — model choice, review process, measured defect rates — or leaves the claim at the level of a conference anecdote. Second, whether other prominent maintainers follow him in public, which would signal that hand-written code is becoming an exception rather than the default in mainstream open-source work.