John Gregoriadis wired a live C. elegans connectome into the control loop of a Claude coding agent, then watched what the worm did when the code broke.
It’s C. elegans, a roundworm about a millimetre long. It has 302 neurons, and scientists mapped every single connection between them back in 1986 (the year I was born, which I’m choosing not to read anything into). It’s one of the only nervous systems we understand all the way down.
I took 14 of those neurons and ran them live in a simulation. Four of them do the heavy lifting. One is a salt sensor, and to a worm salt means food, so I wired it to reward. Its opposite I wired to bad results. One drives the worm forward, so I wired it to how much work is left. One throws it into reverse, so I wired it to errors.
I didn’t make any of that wiring up. It’s the published connectome. All I did was connect the worm’s senses to the agent’s situation and let it run.
See the video and more in the article here.
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