1. Understand that code that has been wholly or partly LLM generated is tainted - it has (in at least some part) been created neither by humans nor by a deterministic, verifiable, process. Any representations to its quality are therefore void.

2. Ban tainted code.

Consider code that (in the old days) had been copy pasted from elsewhere. Is that any better than LLM generated code? Why yes - to make it work a human had to comb through it, tweaking as necessary, and if they did not then stylistic cues make the copy pasta quite evident. LLMs effectively originate and disguise copy pasta (including mimicking house styles), making it harder/impossible to validate the code without stepping through every single statement. The process can no longer be validated, so the output has to be. Which does not scale.