A Rails developer reflects on DHH's Rails World keynote about AI agents handling code generation, acknowledging both the technology's progress and the value of deep understanding. While agents show promise for routine tasks, the author argues that human developers remain essential for maintaining system coherence, understanding failures, and making architectural decisions.
David Heinemeier Hansson, creator of Ruby on Rails and co-owner of 37signals, announced in September 2026 that his company has stopped writing code by hand, instead relying on AI agents like Anthropic's Claude Opus 4.5. He argues that AI has democratized software development by ending programmers' monopoly on computing, comparing it to the Reformation's impact on the clergy, and believes similar disruption will affect other knowledge work.
David Heinemeier Hansson, creator of Ruby on Rails and co-owner of 37signals, announced in September 2026 that his company has stopped hand-writing code, comparing programmers to a priesthood whose monopoly AI has ended. His new operating system Omarchy, built with AI agents like Anthropic's Claude Opus 4.5, was developed entirely without human code-writing and has attracted over $21 million in funding from major tech leaders.
Ruby on Rails creator David Heinemeier Hansson announced that his company 37signals has adopted a 'pencils down' policy, using AI coding agents as the default and handwritten code only as exception handling. Hansson emphasized this reflects an industry shift enabled by tools like Claude Code and Cursor, though developer adoption remains mixed with over 45% reporting they're keeping pace with AI tools while 17.5% opt out entirely.