Scenes that cross into each other
Ask the AI to rework one scene, and it reads your whole story but writes only that scene. Good rule. Except it was reading less than we thought: the "neighboring scenes" it saw stopped dead at a sequence boundary, so the first scene of nearly every sequence got written blind to whatever came right before it, exactly where a reader notices a voice change most.
Fixed by handing it real neighbors, in story order. But that surfaces the harder problem: what happens when a good rewrite breaks the scene next door? Scene 11 ends with Rosa driving away. The rewrite has her arriving on foot in scene 12.
The fix isn't permission, it's declaration. The model can now touch a named neighbor, but only if it says so first, with a reason, before the fact. "You may edit what you justified" is a rule we can check against what comes back. "Edit wherever you judge there's discord" is not a rule at all, since an overreaching model will call its own overreach discord, and mean it.
You see every crossing before it lands, each with a checkbox of its own. Past four repairs in one pass, every one is refused. That's a rewrite wearing a repair's clothes.