Which LLM is running with Harper?

Is this using local LLMs or some other engine?

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`."
        ),

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

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

IMO not using LLMs is a big plus in my book. Grammarly has been going downhill since they've been larding it with "AI features," it has become remarkably inconsistent. It will tell me to remove a comma one hour, and then tell me to add it back the next.

I think if you can self host language tool, it would still be the better option.

"Me and Jennifer went to have seen the ducks cousin."

No errors detected. So this needs a lot of rule contributions to get to Grammarly level.

Looks awesome! I’ll give it a try over language tool.

Is there any reason why there is no firefox extension?

“Yo who dis?”

Passes.

For reference: https://youtu.be/w-R_Rak8Tys?si=h3zFCq2kyzYNRXBI

Slightly controversial compared to other comments here but I haven't used Grammerly at all since LLMs came out. Even a 4B local LLM is good enough to rephrase all forms of text and fix most grammer mistakes.

Very buggy, but great start!!

I.e. if you write an "MISTAEK" and then you scroll the highlight follows me around the page