Geoffrey Huntley
The Ralph loop, and back pressure for agents
14 July 2025
“Anything can be wired in as back pressure to reject invalid code generation.”
Huntley, Ralph Wiggum as a "software engineer", 14 July 2025
The written start of the chain. "In its purest form, Ralph is a Bash loop." The post is not the first showing: Horthy records Huntley presenting Ralph at a meetup on June 19th 2025. The word back pressure is older than software.
Taught in the course
- 17Ralph loop in Many agents
- 9Backpressure in Backpressure
Documented influence
- same author, pointing back“remember this from the original ralph post”Huntley, everything is a ralph loop, 17 January 2026
- tells the story and links Huntley“The Ralph Wiggum Technique, created by Geoff Huntley”That sentence is from Horthy's post of 6 January 2026. The December post on backpressure also links a Huntley post.Horthy, A Brief History of Ralph, HumanLayer, 6 January 2026
- links it, without naming Huntley“loop agents until they have stamped out all of the inconsistencies and issues for you.”The words "loop agents" link to ghuntley.com/ralph. It is the only mention, and it isn't a credit for back pressure.Moss, Don't waste your back pressure, 17 January 2026
Then on to: Ryan Lopopolo, OpenAI, Vivek Trivedy, Birgitta Böckeler, Addy Osmani.
Not on the record
We found no earlier use of back pressure for agents in this pass, and we did not search exhaustively. No page we opened credits Huntley with coining the agent sense.