Just like it does when given an existing GPL’d source and dealing with its hallucinations, the agent could be operated on a black box (or a binary Windows driver and a disassembly)?
The GPL code helped here but as long as the agent can run in a loop and test its work against a piece of hardware, I don’t see why it couldn’t do the same without any code given enough time?
Consider that even with the Linux driver available to study, this project took two months to produce a viable BSD driver.
The next implementation doesn't have to happen in a vacuum. Now that it has been done once, a person can learn from it.
They can discard the parts that didn't work well straight away, and stick to only the parts of the process that have good merit.
We'll collectively improve our methods, as we tend to do, and the time required will get shorter with each iteration.
In fact most Windows binaries have public debug symbols available which makes SRE not exactly a hurdle and an agent-driven SRE not exactly a tabula rasa reimplementation.