What is the Operator Loop Stack?

The Operator Loop Stack is Jack Njoroge's framework for deciding whether an AI agent loop is safe to run. It has five layers: harness, loop contract, state layer, checker, and human checkpoint.

What is the Operator Test?

The Operator Test is a safety rule for AI agent loops: if the agent cannot prove it is done, you are not engineering a loop; you are automating drift.

Jack Njoroge - Jack Njoroge

Q: What is loop engineering?

Loop engineering is the practice of designing systems that prompt, verify, retry, and stop AI agents instead of manually prompting them turn by turn.

What Is Loop Engineering? The 2026 Guide to AI Agent Loops

A practical guide to loop engineering, AI agent loops, /goal vs /loop, and the Operator Loop Stack for building safer autonomous workflows.