The man who created Claude Code — the AI agent that now writes a sizable share of the world's code and most of Anthropic's own — no longer writes code himself. Boris Cherny writes loops: standing instructions that run hundreds of agents while he supervises. His honest account of that shift, and of who it makes more valuable and who it erases, breaks the comfortable story the industry tells about the future of engineering.

Juniors are being displaced — sharply and measurably — but 'senior beats architect' turns out to be a false binary. A randomized trial found expert developers were 19% slower with AI on code they knew well, even as Cherny names domain experts, not professional engineers, as the biggest winners. The role isn't vanishing; it's moving up a level to the hybrid orchestrator who fuses architectural judgment with hands-on fluency. This is the verified story of Cherny, his tool, and what both reveal about where engineering talent, roles, and AI-leveraged building are heading in the next one to two years.

I'm Dan. AI moves too fast to keep up with, so I built my own stack of AI tools to research, analyse, verify and illustrate the questions I can't stop thinking about — mostly to learn it myself, and I share what I find. AI-assisted, fact-checked, worth a second look.

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