In the field of artificial intelligence, prompt engineering was once seen as the essential skill for interacting effectively with AI. But that paradigm is rapidly evolving. According to Business Insider, AI leaders such as Boris Cherny, creator of Claude Code, and OpenAI engineer Peter Steinberger have moved away from manually writing prompts and are now embracing "Loop Engineering." Cherny stated bluntly in a CNBC interview: "My agent now writes prompts for Claude; I no longer write prompts myself." He even predicts that the loop approach and its associated features will be among his proudest achievements over the next decade.
So-called "Loop Engineering" doesn't replace prompts—it enables AI agents to automatically generate, optimize, and execute prompts through a self-iterating loop mechanism, creating more efficient autonomous workflows. OpenAI engineer Steinberger reminded users on X: "This is your monthly reminder—you should no longer manually write prompts for coding agents." Claire Vo, founder of ChatPRD, summed it up neatly: "Remind yourself that you don't need to type prompts with human fingers; your agent can do the work for you." This idea is fundamentally reshaping how developers collaborate with AI.
