Any professional writers here? Noob needs feedback please ;)

Sure. The honest answer is that I am not doing it as one long chat prompt. I built an operating system around the model for this kind of work. That is the main difference. The inputs are not just “write me a book.” They are things like the premise, genre, reader experience, characters, world rules, structure, chapter purpose, continuity notes, style target, and what the finished thing is supposed to feel like. Then the work runs through stages. First the system builds the book shape. Then it builds the world and character logic. Then it breaks the book into chapter targets. Then it writes chapter by chapter while carrying the existing state forward. Then it runs passes for continuity, pacing, voice, structure, consistency, and cleanup. Then it exports the final manuscript. So the model is still doing the language work, but it is not being asked to hold the whole book in a chat window. The system around it holds the memory, the structure, the current state, the canon, the run history, and the revision targets. That is why I say I can write whatever I want end to end now. Not because one prompt creates a perfect book, but because the model is working inside a controlled process built for long form work. The first full proof for me was a romance novel called The Last First Kiss. I put it together in about a day and published it on Royal Road. It was not about proving I had written the greatest romance novel ever. It proved the system could carry a complete manuscript from concept to final output instead of just generating loose scenes. I can share snippets separately if people want, but the main thing is the process. Raw chat falls apart because it has no real book state. A writing system does not have that same limit.