Write without slop
Prose that carries no AI tells and that a reader understands on the first read, with every fact the source stated still there. Both goals hold at once: text that is free of tells but still dense has failed, and text that is plain but changes how certain a claim is has failed.
Done: the mode's output is returned, every fact, number, name, quote, and citation in the input survives, and nothing was added that the source or the caller did not supply.