
"Loop engineering is replacing yourself as the person who prompts the agent. You design the system that does it instead."
Everything started with a tweet from @steipete:

Then Addy Osmani wrote a full article about it.
The thesis is that a loop here can be thought of a recursive goal where you define a purpose, and the AI iterates until complete. It's roughly five building blocks:
And Claude Code and Codex both have all five now.