Write with any AI. Keep every chapter true to your story.
Alcove checks each chapter against everything your story has established, shows you exactly what it changes, and lets you decide what becomes canon.
Maren / The Hollow Crown
Break the lantern vow
Intended change
Maren breaks the vow where Yren can see it, choosing the archive over his trust.
Ready to review · 3 changes proposed
Chapter excerpt
2,418 wordsThe vow-light went out between them. Maren felt the archive take notice—not with a sound, but with the sudden weight of every shelf leaning toward the truth.
Checks
3 pass · 1 flag- ContinuityNo contradictions with locked canon
- Intended changeThe vow breaks in public, as planned
- PacingOne later reveal may arrive too early
- Story rulesArchive magic remains internally consistent
Canon Lock is yours
Keep, revise, or set aside each change before this chapter becomes canon.
Longfic without continuity drift
Chapter 40 still answers to chapter 3.
Original worlds that compound
Cast, rules, routes, and history become durable canon.
AI-native without model lock-in
Keep the assistant and writing surface you already prefer.
Long stories break in small, expensive ways.
A remembered eye color is not enough. Long-form fiction needs to know which facts are true, when they became true, which promises remain open, and whether a new chapter quietly broke any of them.
Catch the contradiction before a reader does.
Alcove compares each proposed chapter with locked character state, relationships, places, rules, and timeline facts.
Check whether the chapter delivered the change.
The draft is read against its intended turn—not only for what happened, but for what it promised to make happen.
Keep the right threads alive.
Open promises and route pressure stay visible, so the next direction grows from the story instead of a blank prompt.
The chapter can come from anywhere. Canon has one door.
Generation is a choice. Review is the system. Every path converges on the same checks, proposed changes, and human Canon Lock.
01
Decide what changes next
Start from a recommended direction, your own intent, or a chapter already in progress.
02
A chapter arrives
Write with an MCP-capable assistant, or paste a chapter written anywhere.
03
The checks read it against canon
Continuity, adherence, pacing, and story rules settle around the exact chapter version.
04
You decide what becomes true
Review every proposed change. Canon Lock only the chapter and consequences you approve.
Write in an MCP-capable assistant
Canon context and the full review loop travel with you.
Paste a chapter from any model
No lock-in, no special editor, no charge to attach it.
Generate when you want a hand
A lightweight built-in producer—not the definition of the product.
Your story does not merely remember. It knows what you approved.
Every Canon Lock adds durable state to your Cast Board, Story Codex, timeline, relationships, and routes. The next chapter inherits that truth without asking you to rebuild a story bible inside every prompt.
- Facts carry the chapter that established them
- Test Saves let alternate timelines grow without rewriting Main
- Recommended next moves account for what is still unresolved
Cast & Codex
A living reference, built from locked chapters
Characters, places, rules, objects, and relationships update from what actually became canon.
Save Files
Branch the timeline without losing the story
Explore a fix-it, divergence, romance route, or what-if while Main remains intact.
Auto Route
Come back to a story that knows where it is
See the sharpest unresolved thread and three grounded directions instead of a blank box.
Public forge
Share deliberately, with the whole history visible
Make a cartridge public when you choose. Readers browse its canon and Remix their own version.
Start from a world you love—or one only you could invent.
Fanfiction and original fiction need the same hard thing: a durable account of what is true, what may change, and what must still be paid off.
Honor canon. Diverge on purpose.
Import what already exists, choose where your Save File branches, and let every later chapter remember the route you chose.
Build a world that compounds.
Turn chapters into a cast, codex, timeline, and route history you can query, branch, share, and export as the work grows.
Canon is the foundation. Compute is the meter.
Start with the complete free canon loop. Upgrade when you want deeper verification or more included generation—not to keep your story safe.
For finding your footing
Free
The complete solo canon loop
Includes about 10 chapter checks · $10/month
For serious long-form writers
Pro
Billed for writers who are active that month
Deep verification for every chapter
Includes about 50 chapter checks · $50/month per writer
For studios and imprints
Enterprise
Priced to your volume and terms
Your canon, on your terms
Canon Lock, canon memory, baseline continuity, safety, BYO chapter attachment, and basic export are never billed. Past your included checks, a deep verification run is $1; Alcove generation, if you use it instead of your own model, is typically $2.50 per full chapter. Overage is off by default and only runs under a monthly limit you set.
Built to protect the part only the writer can decide.
Alcove automates the continuity toil. Taste, direction, publication, and canon remain yours.
Notes for writers working with AI and long canon.
Can you legally publish fanfiction?
What you're allowed to do with fanfiction, what you aren't, and the well-trodden path writers use to turn a fan story into a book they can actually sell.
Read articleFrom fanfiction to a bestseller: how the serial numbers get filed off
Fifty Shades of Grey was Twilight fanfiction. The Mortal Instruments grew out of Harry Potter fandom. Here's the actual transformation that turned fan stories into books their authors own.
Read articleAlcove vs Sudowrite, NovelAI, and NovelCrafter
How a review-first narrative operating system with checked canon differs from popular AI writing tools — and which kind of tool fits which writer.
Read article“A long story deserves more than a model’s best guess about what happened before.”
Alcove began with an unfinished story and a stubborn question: what would it take for an AI-assisted chapter to respect every promise the story had already made?
The answer was not another prompt box. It was a place where chapters arrive as proposals, checks make hidden drift visible, and the writer remains the final authority over canon.
The app proposes. The writer steers.
Bring the story. Alcove will keep the truth.
Start with a private cartridge, connect the way you already write, and make your first Canon Lock free.