everything-about-loop-engineering

Stop prompting. Start designing. The complete reference and hands-on course on loop engineering — designing systems that prompt AI coding agents — from absolute beginner to production-ready, in one repo.

This repo documents a discipline that is approximately two weeks old as of mid-June 2026. See HONESTY.md for transparency about the field's age, claim classification, and limitations.

The Big Idea

For two years, the way you worked with AI coding agents was simple: you typed a prompt, read the response, typed another prompt. One turn at a time. You were the human in the loop.

Loop engineering changes that. Instead of typing prompts yourself, you design the system that generates them — automatically, on a schedule, with verification, state memory, and sub-agent checking.

"My job is to write loops." — Boris Cherny, head of Claude Code at Anthropic

"You shouldn't be prompting coding agents anymore. You should be designing loops that prompt your agents." — Peter Steinberger (6.5M views)

"Build the loop. But build it like someone who intends to stay the engineer, not just the person who presses go." — Addy Osmani, who coined the term

What is Loop Engineering?

Loop engineering is replacing yourself as the person who prompts an AI coding agent — designing the system that does it instead.

The term was coined by Addy Osmani on June 8, 2026. The technique originated with Geoffrey Huntley's "Ralph" loop in July 2025.