Writers worry that using AI will sand their voice down to a smooth, anonymous gloss. The worry is legitimate — but the cause is almost always the same, and it is fixable. Generic prose is what a model produces when nobody told it whose voice to write in. Voice is not something you rescue after the fact with a "humanizer"; it is something you specify before the first sentence and enforce on every draft.
Voice is a set of decisions you can name
It is tempting to treat voice as a mystical quality, but on the page it decomposes into concrete, repeatable choices. Who narrates, and how close are we to them? Past or present? Long, rolling sentences or short, clipped ones? Plain diction or ornate? Do characters speak in subtext or say what they mean? What images recur? And crucially — what do you refuse to do? Every one of those is a decision you can write down, hand to a collaborator human or otherwise, and check a draft against.
That is why the fix for "AI sounds generic" is not a better prompt like "write in my voice" — the model has no idea what that means. It is a specification. The eight-part contract above is that specification: it turns the intangible into eight instructions concrete enough to enforce.
A worked revision: one paragraph, held to the contract
Suppose the contract says: past tense, close third on Mara, short sentences, plain concrete diction, a recurring salt-and-tide image system, and a hard avoid on rhetorical questions and the word "suddenly." Here is a generic draft:
DRAFT: "Suddenly, Mara felt a wave of overwhelming emotion wash over her as she gazed out at the vast, glittering expanse of the ocean. What did the future hold for her now? Everything had changed, and she knew that nothing would ever be the same again."
Now the same beat, revised against the contract:
REVISED: "The tide was going out. Mara watched the water pull back from the rocks, leaving them slick and black. Her hand found the salt-crust on the rail. Whatever came next, it would not be this."
Every change traces to a rule, which is the point — nothing here is taste for its own sake:
- "Suddenly" is gone — it was on the hard-avoids list.
- The rhetorical question ("What did the future hold?") is cut for the same reason.
- "Overwhelming emotion" and "vast, glittering expanse" go — the contract asks for plain, concrete diction, so we show the tide, not the feeling.
- Salt and tide do the emotional work — that is the declared image system earning its place.
- Sentences are short and we stay inside Mara’s senses — close third, the declared distance and rhythm.
Notice what this is not: it is not a pass to "humanize" or disguise anything. It is craft — a draft measured against choices the author made, and revised where it fell short.
The honest take on "humanizing" AI writing
Search interest in "humanizing AI text" is usually really a search for this: writing that sounds like a person because a person made real choices in it. The reliable way to get there is the contract-and-revision loop above. It produces prose that is genuinely yours, not prose engineered to fool a detector — and it holds up to the only audience that matters, which is a reader.
This page deliberately stops there. Defining and enforcing your voice is craft worth teaching. Tools built to evade AI detection are a different thing with different aims, and they are not what this is about. Do the craft, and the "does this sound human" question mostly answers itself.
Keep the contract where the book applies it
A voice contract you write once and lose is a voice contract you stop enforcing. The reason voice drifts across a long AI-assisted book is that the standard lived in a chat that scrolled away, so nothing was holding chapter twenty to the choices you made in chapter one. The contract has to persist, and it has to be applied.
In BookWriter, an approved voice contract lives with the project as a rule the drafting can be held to, chapter after chapter. You keep writing in whatever conversation you like; the standard travels with the book, so the last page sounds like the same author who wrote the first.