I have something to ask about Nu Html Checker, hope you can answer it

Dear Validator

We are building an application to check for W3C errors for multiple pages
of a website and output those errors to the user.
We are delighted to have found full support from
https://github.com/validator/validator/

I have a question as follows, hope you can take the time to explain.
Is there any documentation that describes the full range of errors returned
when using Nu Html Checker (https://github.com/validator/validator/) ?
If yes, could you please send it to me?

Thank you so much, we really appreciate you building a great app to check
W3C.

Thank you for your consideration