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The Best Engineers Stopped Writing Prompts: The 4 Layers That Replaced Prompt Engineering

Boris Cherny, the builder of Claude Code, stated in June 2026 that he no longer writes prompts for Claude, instead using loops that have replaced prompt engineering. This shift highlights a new paradigm where engineers move beyond manual prompting to automated, layered systems.

read1 min views30 publishedJun 22, 2026

Boris Cherny built Claude Code. In June 2026 he said the quiet part out loud: “I don’t prompt Claude anymore. I have loops running that… Continue reading on Towards AI »

source & further reading
pub.towardsai.net — original article A Netflix Scientist Says Resample Your LLM Judge. 5 Runs Cut the Error Bar 13% Jev as a Quiet Layer Before the LLM: Building a Prompt-Aware Model Router I Asked Claude the Same Question on Low, High and Max. Only One Looked at My Project.
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