Intel's software optimization guides have similar annotations on many of their guidelines, and have done since long before LLMs were a thing. As a reader it's useful to know how impactful a given recommendation is and how generally applicable it is without having to read the more detailed explanations.

Ahh, interesting, thanks. (I read the reference manuals but typically ignore the rest... I don't need to write this stuff, just read it!) I've seen people recommend creating docs to be LLM-friendly and I was wondering if this was an instance of that.