The recursive machine

An engraved plate in indigo showing the recursive machine as a factory line. Hoppers at the left pour text, code, images, designs and data into a central block labelled MODEL, whose output runs away along a conveyor of content, code, designs, models and data, curves round, and returns to the input side, captioned feedback loop, outputs become inputs. A verification checkpoint sits on the line, labelled can tell better from worse cheaply and honestly, with keep and discard boxes. Material passing no checkpoint spills off the end into a heap marked slop: cheap, unverified, unscored, unclaimed, yet invaluable. A person sits at a desk to one side beneath the question, what observation cannot be generated by the system being evaluated. Two further plaques read: the ledger records the purchase, the cost arrives later; and archives improve with age, today's slop is tomorrow's training set.

Machines have been improving machines for a long time, quietly, in the places where the improvement could be measured. Compilers are built by compilers. Chips are laid out by tools that will later run on them. What has changed is not the existence of those loops, but their reach: systems now produce the material later systems are trained on, the code they are assembled from, the tests they are judged by, and the experiments that decide what they become.

That moves the interesting question. Not what a model can do for the person using it, but what it produces for its successors, and what is left in the arrangement that can tell whether any of it is an improvement.

A model is a component. The recursive machine is the arrangement in which machines produce the material, code, evaluations and infrastructure that later machines are made from. Its governing property is not power.

Recursion is a topology, not a direction. A loop can compound towards the wrong thing. What decides which way it runs is whether anything in it can tell better from worse, cheaply and honestly.

Disclaimer

The observatory notes the difficulty of its own position. Anything written here about machines producing material for machines is itself material, and stands a fair chance of being read by a crawler some months before it is read by a person. The clerks have agreed not to think about this during working hours.