>Only if the problem is declared to be whatever it is that spell checkers solve.

The problem being misspelling, hence, "spell checker". Like, this seems pretty straightforward? Grammar checking if you cannot use the language properly is a pretty different problem space, and indeed has long existed and is exposed as a separate thing. And not just in fancy word processors either, if you go to something as simple as macOS TextEdit you'll see separate check boxes for "Check spelling as you type" vs "Check grammar with spelling". If someone wants to try out using LLMs for grammar no problem, but spell checking is purely about the mechanical and, importantly, deterministic aspect of typos or outright non-words.

>As the classic joke goes, "Me spell chucker work grate. Need grandma chicken."

There is a genuine touch of irony/meta in you using that here in this context. That sentence has no misspelled words, and importantly gets across the exact humorous meaning the human who wrote it intended. The joke literally only works because a human was able to make creative use of language. If you had an LLM agent posting for you to HN and it automatically changed that to:

>As the classic joke goes, "My spellchecker works great but could use some grammar checking."

Well, where would the joke be now!? This goes to the exact concern people have with powerful non-deterministic meaning-changing tools replacing deterministic meaning-preserving ones.