I have built a similar tool to help me edit my PhD thesis a few years back: https://expresso-app.org/ https://expresso-app.org/. It helped me improve my writing

I have built a similar tool to help me edit my PhD thesis a few years back: https://expresso-app.org/ https://expresso-app.org/. It helped me improve my writing but was also picked up by some English teachers to use as a scalable way for providing initial feedback to students, so they can later focus on deeper feedback in their own grading. So I now keep the tool running for the small community.