Loop Engineering 2026: Build Agent Loops, Not Prompts
“As Boris Cherny put it: ‘I don’t prompt Claude anymore. I have loops running that prompt Claude.’ When I first read that, it hit me. And I’d been wasting months polishing one-shot prompts when the real unlock was building systems that prompt themselves. That’s Loop Engineering. And Cobus Greyling’s repo (4,156★ in 21 days — that’s 197★/day) is the first complete toolkit that makes it practical. And not another prompt library either. Also not a ‘how to write better prompts’ tutorial. And it’s a full stack — CLI tools, 7 production patterns, and an MCP server — designed to shift you from writing prompts to designing control systems that orchestrate AI coding agents over time. ...