Guide
How to keep characters consistent in an AI-written novel
An AI writes a novel one chapter at a time and never rereads the whole book, so anything it can't see when it writes chapter 14 can quietly change. The fix is to decide which facts are fixed and put them where every chapter can see them, then check the draft for the ones that slipped.
The short answer
- Details stated outright in the premise stayed consistent across all 20 chapters of our test novel. Details the AI invented along the way were the ones that drifted.
- Put a cast list and the rules of your world into the Characters & world box before you generate. It becomes your Story Bible, which every chapter reads as fixed facts.
- After the book is written, add what the chapters invented to the Story Bible, then run Continuity Check and read for ages, builds, amounts and exact wording.
- No tool catches everything. Plan a read-through.
What the AI sees when it writes a chapter
It never sees the whole book at once. A detail that isn't in the premise, the Story Bible, a recent summary or the last pages it read is one it can get wrong.
- Your premise and outline
- The premise you wrote goes into every chapter, word for word, with the chapter's own description from the outline you approved.
- Your Story Bible
- Characters, places and facts you gave it, up to 16,000 characters, marked as facts the chapter must not contradict. Only if the book has one: it is made from the Characters & world box, or the first time you open the book in Write Studio.
- Summaries of the last 10 chapters
- Written automatically after each chapter, with up to 20 fixed details per chapter (ages, builds, amounts, exact wording), each backed by a quote from the text.
- People and places from earlier on
- Short notes on who and what was established before those chapters, so chapter 25 still knows the opening cast.
- The end of the previous chapter
- About the last 4,000 characters, roughly 700 words, so the scene and the voice carry over.
We tested it on a 81,773-word novel
We wrote one premise for a literary mystery: a harbor ledger-keeper on a cold island, a brother who vanished eleven years ago, a forged debt, a dying ferryman. We planted fixed details on purpose: a white streak in her hair, a habit of counting under her breath when she lies, a compass engraved with her brother's initials, a promise to scatter the ferryman's ashes from a sea stack. We left the Characters & world box empty and approved the outline unedited, so the book had no Story Bible. Then we read all 20 chapters and traced 12 details from the first four chapters to the end.
The book, The Salt Ledger, was written by our Ultra Max generator on October 7, 2026: 20 chapters. Of the 12 details, 7 held, 4 were contradicted and 1 was dropped.
The white streak in her hair
In the premise
Mentioned through chapter 20; in chapter 15 a stranger recognizes her by it.
Counting under her breath when she lies
In the premise
In 18 of 20 chapters, and it gives her away at the hearing in chapter 19.
The rule: a salt debt unpaid by first snow gets your name struck
In the premise
The climax is built on it.
Her age when she forged the ledger
In the premise
Twenty-three in chapter 3, thirty-three in chapter 8. The premise gave her age now and the years since, and the AI did the sum two ways.
The compass engraved T. H.
Invented by the chapters
Carried through chapter 17. The initials move from the back to the lid's edge, a small wobble.
Her brother's parting words
Invented by the chapters
Said in chapter 3, answered in his own letter in chapter 13.
How her brother left the island
Invented by the chapters
Rowed out past the outer float before dawn, and every later account agrees.
Black sand found in the ledger
Invented by the chapters
Described the same way across 12 chapters.
What her brother's debt was for
Invented by the chapters
Skiff repairs, 52 crowns, in chapter 1. A freight advance of salt cod in chapter 2, and from then on.
The wording of the forged entry
Invented by the chapters
Chapter 2 names the work, "west slip repairs". Chapters 9 and 16 say the line names none.
The clerk's build
Invented by the chapters
Broad-shouldered in chapters 4 and 14, narrow in chapters 7 and 10.
The wreckage that made the drowning believable
Invented by the chapters
Set up in chapter 1, never explained, even in the confession.
From the book itself
Held for ten chapters: a line the AI invented
HeldThis line isn't in the premise, and the automatic summaries never recorded it. The brother's letter, ten chapters later, still answers it.
“That was what he said first.” Ansel’s mouth moved as though the old sentence still resisted fitting itself to the years. “Then he said, tell her no book is worth what comes after if she does it.”
When I understood you meant to mend it in the books, I said no because I knew you would do it well enough to bury the path to yourself and badly enough to bind yourself to it forever.
Slipped five chapters later: a number worked out twice
ContradictedThe premise says she is 34 and the forgery was eleven years ago. Chapter 3 gets 23. Chapter 8, set in the present, gets 33.
You were twenty-three and desperate enough to alter the harbor books with your own hand.
Not Hale children, she nearly said. I was thirty-three then, not three.
What the test showed
What is in front of the AI holds
All three details that the premise stated outright stayed consistent for 20 chapters, because the premise is in every chapter's prompt. The one that slipped was a number the AI had to work out from two others.
What it invents is at risk
Of the eight details the chapters made up themselves, four held, three were contradicted and one was dropped. Nothing but the AI's own summaries carried them forward, and in this book those summaries recorded what happened, not fixed facts like a debt's terms or a man's build.
Small facts slip, the story doesn't
The plot, the secret and the rule the climax depends on held throughout. What changed were amounts, ages, a physical build and the wording of a document, exactly what a reader notices on a second read.
A checker only sees what was written down
Our own Continuity Check, run on the book as it was, found none of the four contradictions or the funeral that didn't add up. It compared each chapter against the summaries, and the summaries had never recorded those facts.
What we changed after reading it
We made these changes on October 7, 2026, the day we finished reading. They apply to every book written since.
- The summary written after each chapter now records its fixed details: ages, builds, amounts and debts with their terms, the exact wording of anything written or sworn, and where a body or a key object is. Each one is kept only if it comes with a quote from the chapter.
- The notes on earlier chapters keep the main characters in long books and put their fixed details first.
- Continuity Check now compares each chapter with those quoted details and drops any finding it can't back with a quote from earlier in the book.
Run again on the same book, Continuity Check found four of the five problems we had found by reading. It missed the forged entry's wording. We have not regenerated the book, so we can't yet say how much the new summaries change the writing itself.
How to keep your own novel consistent
Each step uses what the app does today, checked against the product on October 14, 2026.
- 01
Write the fixed facts into the premise
Ages, scars, what someone owes and to whom, the rule your world runs on: anything stated in the premise goes into every chapter's prompt. State numbers outright rather than leaving the AI to work them out. "She was 23 when she forged it" holds better than "she is 34; it was eleven years ago".
- 02
Fill in Characters & world
In the Pro and Ultra generators, paste a cast list and the rules of your world into the Characters & world box. Before chapter 1 is written it becomes the book's Story Bible, and every chapter reads it as facts it must not contradict, up to 16,000 characters. Our test book left it empty on purpose.
- 03
Read the outline before you approve it
Each chapter is written from its description in the outline. If a chapter should keep a promise, reveal a name or settle a debt, say so there.
- 04
Add what the chapters invented
Open the finished book in Write Studio (Co-write in the app's sidebar) and read its Story Bible. Add the people, objects and facts the chapters made up that matter later. Anything you add is read by every chapter you write, regenerate or continue from then on.
- 05
Run Continuity Check, then read
On the Pro plan, Continuity Check reads up to 25 chapters per run against your Story Bible and the facts recorded from earlier chapters, and lists each contradiction with the passage and the earlier fact it conflicts with, at 3,000 credits a chapter. It changes nothing on its own. Then read for the kinds of detail that slipped in our test: numbers, physical descriptions, exact wording, who is holding what.
- 06
Fix it in place
Edit the passage yourself, or select it in Write Studio and have the AI rewrite it, at 500 credits an action. If the fact belongs to the whole book, put it in the Story Bible too, so the next chapter you write gets it right.
What to read for
Numbers worked out from other numbers
Ages from birth years, "years since" from dates. The AI may do the sum differently in different chapters.
Physical descriptions of minor characters
Leads get mentioned often enough to stay fixed. A clerk who appears in four chapters can change build between them.
The exact wording of documents
A ledger line, a letter, a sworn oath. Later chapters tend to paraphrase, and the paraphrase drifts.
Objects and bodies
Who holds the compass now. Whether someone was buried or cremated. Our test book scattered a man's ashes and kept his body in a box.
Set-ups that never pay off
A clue planted early and never mentioned again. The AI writes forward and won't go back for it unless the outline asks.
Repeated discoveries
A character learns the same secret twice in different chapters. In our test, one character noticed the heroine's tell in chapter 2 and again in chapter 5.
Common questions
Why do AI-written novels lose track of characters?
Because the AI writes one chapter at a time and never rereads the whole book. For each chapter it sees the premise, any Story Bible, summaries of recent chapters and the end of the previous one. A detail that isn't in any of those, like a minor character's build from chapter 4, can change in chapter 10.
Can AI keep a whole novel consistent?
Mostly, not completely. In our 20-chapter test, the plot and every detail stated in the premise held to the end, while four of the twelve details we tracked were contradicted somewhere. Fixed facts in a Story Bible and a check afterwards close most of the gap. A read-through closes the rest.
What is a story bible?
A list of the facts your book has to keep: characters and what they look like, places, objects, rules of the world, how the story is narrated. In ScribistIQ it is made from the Characters & world box before chapter 1, or from your book the first time you open it in Write Studio, and you can edit it at any time.
Does the AI read the whole book before each chapter?
No. It reads your premise and outline, your Story Bible, summaries of the last 10 chapters, short notes on people and places from before that, and the last 4,000 characters of the previous chapter.
How do I check an AI novel for contradictions?
Run a continuity check, then read for numbers, descriptions and wording. In ScribistIQ, Continuity Check is on the Pro plan, costs 3,000 credits a chapter, and lists each contradiction with the passage and the earlier fact it conflicts with. It changes nothing on its own, and it can miss things.
Did your test book have mistakes?
Yes. Of the 12 details we tracked, 7 held, 4 were contradicted and 1 was set up and never paid off. We also found a funeral that didn't add up. We publish them here because they show what to look for in your own book.
Decide what's fixed, then write.
Characters & world, the Story Bible and Write Studio come with every paid plan; Continuity Check is on Pro. A free account lets you read the AI's writing on the opening of a new book first.
Also worth reading: Finish the novel you started · Features