I think "don't ask to ask" is more accurate. "No hello" can both lead to a misunderstanding and be the result of a misunderstanding.

I learned the concept as "1st rule of IRC: Never ask to ask." Or some variation there of.

TIL about the "no hello" concept and i love it.

Mh, I don't think saying hello is the problem, only when it is the only thing. I've never heard of "no hello" as a concept before. And dislike the crossed out hello images on the club website. A respectful hello as an opener to the question seems appropriate.

What immediately came to mind is "Don't ask to ask, just ask". But that's not regarding a hello opener.

StackOverflow has "How do I ask a good question?". But that's very verbose and elaborative, very extensive.

Last time I looked for something similar I didn't get anything.

The form of how questions can or should be asked depends on context as well. So I'm not sure there's something that would fit all forms of communication or platforms.

What I would likely do, if I had the need for it, is prepare a text template to copy and paste like "[Hi/Hello.] Please write your full question context in one message so there's no round-trip delay or interruptions and the intended question message completeness is obvious."

If it's just occasionally I'll just write it then and there myself.