I find it useful to set up dynamic workflow loops with (1) and/or (2) as checkers.
On (3) - I think "style-transfer" that was all the range in image-gen is going to be very useful for prose-generation. Curious if there are LLMs specifically trained for this.
Re: style-transfer, I simply point it at examples of my writing and asks it to use sub-agents and review paragraph by paragraph for consistency with my writing-style. I do the "paragraph by paragraph" thing because the main agent otherwise tends to get sloppy.
Some checks for repetition and particularly egregious quirks that are not style specific tends to also be helpful (e.g. Claude at least used to have a thing for using numbers ending in "47" if something calls for random numbers), but most stylistic ticks are fixed by the above.
Depends if you just want it to not sound obnoxious or whether you want to fool an AI checker - the latter would benefit from more, but it's not really something I care about.
Some checks for repetition and particularly egregious quirks that are not style specific tends to also be helpful (e.g. Claude at least used to have a thing for using numbers ending in "47" if something calls for random numbers), but most stylistic ticks are fixed by the above.
Depends if you just want it to not sound obnoxious or whether you want to fool an AI checker - the latter would benefit from more, but it's not really something I care about.