David Heinemeier Hansson (DHH), creator of Ruby on Rails, has shifted his approach to software development, moving from writing all code manually to an agent-first methodology. While his core philosophy on AI remains unchanged, the capabilities of AI tools have evolved significantly, particularly with the advent of powerful models like Opus 4.5 and agent harnesses. DHH now utilizes multiple AI agents, including Gemini 2.5 and Opus, to assist in code generation and exploration, though he maintains high standards for quality and craft, merging agent-produced code only after careful review. AI
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RANK_REASON This is an opinion piece by a notable figure in software development discussing his evolving use of AI tools.
