The End of Manual Prompting
Boris Cherny, the head of Claude Code at Anthropic, has highlighted a fundamental shift in software engineering. He noted that great engineers are more important than ever, but their day-to-day work has changed dramatically [[20]]. Cherny revealed that he no longer writes prompts manually, signaling the end of traditional prompt engineering as a primary engineering task.
Loop Engineering in Practice
Instead of crafting individual prompts, Cherny now manages loops of AI agents that handle coding tasks autonomously [[23]]. On some days, he oversees tens of thousands of AI agents running simultaneously, reviewing code, executing tests, and iterating on solutions without direct human intervention at each step [[25]]. This evolution represents a new paradigm he refers to as "Loop Engineering."
The Evolving Role of the Software Engineer
This shift does not diminish the role of the human engineer. Rather, it elevates it. Engineers are transitioning from writing every line of code or prompt to designing systems, analyzing architectures, and maintaining critical thinking oversight. The ability to orchestrate autonomous AI workflows is becoming the defining skill of the next generation of software development.