Contracts and documents
Finds the passages. Does not tell you they are fine.
Most editing tools return a text that reads as if a model wrote it - smoother, longer, and no longer yours. The useful version keeps the voice and fixes what is actually wrong.
Or attach the document. It reads docx and pdf.
Voice, length, the German spelling - the constraint matters more than the instruction.
Reading time and readability are numbers, not impressions.

It is an editor, not an author with something to say. Where a text needs a position, a judgement or a fact only you have, it will ask rather than fill the gap with something plausible.
Tighten this without changing the tone. Then tell me the reading time and which sentences run over thirty words.
Medium for editing. Small for measuring, formatting and converting, which is most of the work.
Compare the sizesNot if you say what should stay. Left unconstrained, any model drifts toward its own register - that is what the constraint is for.
Both, and readability is measured on the right scale for each - the English Flesch formula scores German texts too harshly because German words are longer.
It can look them up and cite sources. What it will not do is quietly correct a fact it is unsure about.
Finds the passages. Does not tell you they are fine.
The small exact things, done exactly.
Reads the repository, runs the build, reads the errors.