How BookFoundry keeps a long story consistent
A 300-page book fails in a specific way: chapter 19 forgets what chapter 4 established. BookFoundry attacks that failure twice. Constraints the engine must obey while writing, then a verifier that reads the finished manuscript and proves what it found with quotes.
Start a book that holds togetherHalf one: constraints while the book is written
Consistency is not a reminder in a prompt. It is a set of inputs the engine is required to honor.
A continuity memory window
Before writing each new chapter, the engine re-reads a window of the chapters that came before it. You control the depth: 1 to 10 prior chapters, default 3. The story is written by something that just re-read the story.
Anchor chapters it may not touch
Chapter titles and descriptions you author yourself are hard anchors. The engine is instructed never to rename, remove or duplicate them; it writes around your plan, not over it.
Character sheets with real psychology
Every character carries a 7-tab sheet: identity, appearance, psychology (want, need, lie, wound, ghost), personality, arc, relationships and hidden depth. Set a relationship on one character and the inverse is written onto the other automatically.
Per-field locks
Lock any field, down to a single character trait, and the engine's own refinement passes cannot overwrite it. What you decided stays decided.
Series continuation that inherits
Book two loads book one's story plan and inherits its cast, world, tone and voice. A sequel starts from what already happened, not from a summary you paste in.
World rules and quality bars
Up to 6 hard world rules (for example: magic costs memory), a four-channel sensory palette, up to 3 revision passes, and a minimum craft score per chapter the engine must clear.
Half two: a verifier that proves what it found
After the draft exists, the continuity check reads the whole manuscript and reports places where the book states two different things about the same person or fact. Its scope is deliberately narrow and honest: factual self-contradictions with quotable evidence, not pacing or taste.
Evidence or nothing
Every reported contradiction quotes both passages verbatim and links to their chapters. A claim whose quote cannot be found word-for-word in your text is discarded rather than shown.
A checkable clean result
Differences the checker judged explainable are listed separately with its reasoning. So when it says nothing was found, you can inspect why instead of taking it on faith.
It never rewrites a word
The check reports; the author decides. Your manuscript is never written to. Reports are stored beside the book, not inside it.
Incremental re-checks
After you edit, re-check only the chapters whose text changed and pay only for those. It runs as a background job with a free price quote first, so closing the page never loses a run.
Then close the loop: Replace Everywhere, free
The check finds that the villa was in Tuscany in chapter 2 and in Provence in chapter 14. You decide which is true. Replace Everywhere then applies your choice across every chapter as one operation: each hit shown in its sentence for review first, full one-click undo after.
It costs nothing because it involves no AI: manual editing on BookFoundry is always free. Matching is script-aware, so it behaves correctly in Arabic, where prefixes attach to words, and in Japanese and Chinese, where there are no spaces at all.
A story bible documents. This enforces, verifies and fixes.
Tools like Sudowrite keep a story bible: a reference document the AI consults. Useful, but a reference can be ignored. BookFoundry turns the same knowledge into constraints the engine must honor, then checks the finished book against itself.
| Stage | A story bible | BookFoundry |
|---|---|---|
| Before writing | A reference the AI consults | Constraints it must honor: anchors, locks, character sheets, world rules |
| While writing | Hope the reference was read | A memory window re-reads prior chapters before each new one |
| After the draft | Reread it yourself | A continuity check that quotes contradictions verbatim, then a free book-wide fix |
Questions writers actually ask
Write the book that still makes sense on page 300
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