Lab note · 26 Oct 2026 · simulation

One sentence, and the shaft went in.

Two SO-101 arms on our simulated bench, assembling a gearbox drawn in Fusion. Version 1 pushed the shaft straight down and missed the bore, and the pair stood by. The founder typed one sentence; an AI model wrote version 2, and it was tested in simulated copies before the arm moved.

Fig. 1The take at real speed: version 1, the stand-by, version 2. Rendered from its recorded poses, not filmed.

The shaft with its blue gear rests on top of the dark housing, beside the bore. — Version 1

The shaft with its blue gear is down in the housing. — Version 2

Correction: “If it doesn't drop in, feel around in small circles.” Typed by the founder.
Version 2: Written by an AI model (DeepSeek v4-pro) in 43 s.
Pre-flight: From where the pair stood, 8 of 8 copies passed; from the task's start, 6 of 6; in the scene where version 1 was corrected, 4 of 4.
Signature: The founder approved version 2, and it seated the shaft.
Stood by: 114 s in all.

Version 2 found the housing with the overhead camera and went in on its first descent, so the take shows no circles.

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