Premise
A concrete seed idea becomes source material, not prompt confetti that vanishes after one chat turn.
Control
Writer supplies, edits, or rejects the premise before machinery starts.
No paid generation is required to read this public demo.
FictionOS is an AI-native fiction production OS — planning, voice, chapters, quality, memory, revision, and export in one accountable workflow.
In your voice.·With proof you can inspect.·Yours to keep, forever.
60-second proof tour
A concrete seed idea becomes source material, not prompt confetti that vanishes after one chat turn.
Control
Writer supplies, edits, or rejects the premise before machinery starts.
No paid generation is required to read this public demo.
FictionOS turns the idea into a causal map: architecture, characters, POV, stakes, memory, and chapter plans.
Control
Writer reviews the spine before chapter prose starts.
Planning uses the connected OpenRouter key when run in-app.
Voice Studio can compare generic output against profiled author voice so style is not a mood board.
Control
Writer uploads, tests, refines, attaches, pauses, or deletes the profile.
Voice rebuild/test calls use BYOK and are visible before use.
Chapter writing runs through the registry-driven production pipeline, not a blank chat box with amnesia.
Control
Writer chooses tier, mode, chapter count, direction notes, and when to stop.
Chapter cost varies by model, length, retries, cache, and revision work.
Programmatic checks look for repetition, explainy prose, cliches, rhythm collapse, and regression drift.
Control
Writer can accept, rewrite, inspect, or export instead of being trapped in auto-polish.
Programmatic enforcers are designed to avoid extra model calls.
Review produces auditable targets with approval, rejection, quote, and history rails before finished prose moves.
Control
Writer can run audit-only, guided revision, or controlled automation with a veto.
Revision should quote before mutating finished prose.
Work leaves as manuscript, DOCX, TXT, EPUB, analysis, architecture, or JSON backup.
Control
Writer keeps portable copies and can delete projects.
Export is not an LLM spend event.
voice studio · live demo
Upload three pages. FictionOS writes every chapter the way you would.
the rewrite
voice profile · demo comparison“She found him in the mirror before she found him in the room, and that was the way it had always been with Cal. He was nursing a whisky he wasn’t drinking. When his eyes lifted to hers in the glass he did not pretend he had not been looking, and that, she thought, was the trouble with him. He never gave her the small mercy of pretending.”
“She walked into the bar and saw him. He looked up and their eyes met. Her heart raced.”
what happens after you click write
live — chapter 1 in progress
output — chapter 1, opening
Frank had been retired thirty-one years when his daughter knocked on the door. He knew it was her before he opened it—not because he’d been expecting her, but because nobody else came up the back stairs.
She set a manila folder on the kitchen table the way you set down something that might bite. She didn’t sit. He didn’t offer.
the proof, in your genre
the rewrite
“She found him in the mirror behind the bar before she found him in the room. He was nursing a whisky he wasn’t drinking, watching the door the way a man watches the weather. When his eyes lifted to hers in the glass, he didn’t pretend he hadn’t been looking. That, she thought, was the trouble with Cal Renwick. He never gave her the small mercy of pretending.”
“Her heart pounded as their eyes met across the crowded ballroom. She felt a wave of butterflies. He was the most handsome man she had ever seen.”
six gates every chapter passes
The point isn’t that an AI can write your book. It’s that the system has to keep earning your taste, your voice, and your veto — or you stop it.
Voice Studio turns representative samples into a reusable profile: rhythm, prohibitions, exemplar passages, and things your prose should avoid. Use Hear It before trusting it on a serious project.
146 clichés we won’t let through. Filter words removed. Telling rewritten as showing. The flat prose that gives AI fiction away — gone.
Memory Surgeon tracks every character, relationship, and plot thread across 30+ chapters. Promises made in chapter 3 pay off in chapter 27.
Configure genre, spice level, violence, dark themes, and project notes instead of fighting a generic writing assistant.
Every word, every draft, every iteration. We never train on your work. No claims, no licensing, no marketing without permission.
Built to support AI-assisted disclosure workflows with revision history, exports, and clear ownership copy. No marketplace promises, no fake certainty.
cost calculator
you save, per year
and you get back
1Industry low end. Reedsy 2024 ghostwriter survey: senior ghostwriters quote $0.10–$0.30/word for original fiction; $0.04 is the entry rate for inexperienced freelancers on Upwork. The savings figure assumes you hire cheaply.
BYO Anthropic key. We never mark up usage. Cancel any time.
Studio teams & small presses → contact us for seats & volume
a letter from the founder
The fourth novel I tried to write opens on a Tuesday in November, in a kitchen in Roubaix, with a woman named Édith burning toast on purpose. I have rewritten that scene one hundred and eleven times. I know what she is wearing. I know which of her two husbands is upstairs. I know what the dog is called. I have not been able to make it sound the way it sounds in my head for nine years.
The first three novels are in a banker’s box in my mother’s attic. The third one sold ninety-one copies. I know exactly who bought twelve of them. Two are my aunts.
I built FictionOS because the gap between what a sentence sounds like in your head and what it sounds like on the page is the whole job, and the whole job almost killed the only thing I have ever wanted to do. It is not a chatbot. It is the editor I could not afford, the agent who would not return my emails, and the part of myself that knows what Édith is wearing when my hands are too tired to find the words for the cardigan.
I am still working on the fourth novel. It will be done when it is done. Until then, this is the workshop I wish someone had handed me the night I started — and the burnt toast on the counter when I sat back down.
Create a free account. No card to explore. Bring your OpenRouter key when you are ready to generate.
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