Those massive comments generally refer to intermediate states that never shipped, making them utterly useless, noisy and confusing as a permanent artifact. They're sometimes useful to reviewers, so a commit message or pull request comment is much more appropriate.
That's your perspective. For Claude that's an extension of its thinking, which makes it work better. Just like the person who takes notes so they have references for later. Take it away and you're negatively impacting outcomes.
No, it's the other way around. If you put a comment "don't do foo" in your code, you're biasing future readers, human or artificial, to think about foo when you explicitly want them not to.
It isn't about making readers not think about foo. It's about biasing thought about foo in a particular direction. And I've seen it work multiple times: agent mentions it encountered X comments in the code and revised its action as a result (yes, I read live agent transcripts).
