Harper – an open-source alternative to Grammarly

Comes with a great LSP server capable of checking grammar in code comments:

https://writewithharper.com/docs/integrations/language-serve...

It is available in Autommatic's Github repository:

https://github.com/Automattic/harper

This seems to use a hard coded list of explicit rules, not an LLM

https://writewithharper.com/docs/rules

https://github.com/Automattic/harper/blob/0c04291bfec25d0e93...

        "PointIsMoot" => (
            ["your point is mute"],
            ["your point is moot"],
            "Did you mean `your point is moot`?",
            "Typo: `moot` (meaning debatable) is correct rather than `mute`."
        ),

Is this using local LLMs or some other engine?

Which LLM is running with Harper?