How about this: ask your LLM to review your post, "does it follow HN rules?", "how would others read it", "If I were the other person, how would I feel about this reply" , "is it convincing to you?" that sort of questions. That'll help, and it'll still be your voice.

And beware of what's already in context. Sometimes ideas that seem obvious given antecedents are not so obvious when taken in isolation.