The code we write here is all human-generated. There’s been an initiative to explore LLM usage. So far it’s been in a reviewer role only, as in “here’s some things I found that you could fix”, and then humans discuss each one and determine if it’s valid and how to fix it.

Also one of my domains is in microcontrollers and using specific hardware that needs bit-banging drivers written for, so it’s unlikely any LLM has enough data to write those things itself.