The Hallway Track
Engineering Insights

Quoting Paul Dix

Simon Willison · Aug 26, 2026 · Engineering Insights

AI wrote and refined 1M LOC to produce software now running on millions of machines

“If you can build a verification system and give proper direction, AI can produce a highly complex, highly sophisticated piece of software and it can continue to refine it until it just works.”

Paul Dix argues that AI-generated and AI-refined code at scale—1M LOC now running on millions of developer machines—is a landmark proof point for autonomous software development. His key insight is that the real unlock is pairing AI with a verification system, not the AI alone. This reframes the debate from 'can AI write code' to 'can teams build the scaffolding to validate it.'

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