No problems with GPT-5.6 Sol here. I have an agent file that says, among other things, only to document purpose and intent, not just what the code does, and not write obvious comments. It's been so effective that it often doesn't comment anything at all, including some stuff that's so niche that it must be explained carefully. As a result, I've had to pull back a bit and tell it explicitly which areas to actually add comments for.