AI that answers to your rules.
Your characters, your magic system, your scripture references — OpusDraft holds them in front of the AI as rules on every action, audits the draft against them, and tells you what it changed and what it could not fix.
3 days free · no credit card · your best founding rate at launch
The problem has a name: drift.
Every AI tool eventually forgets what you locked in. Here’s the difference that makes.
A five-step editorial pass that stops the moment your work holds — it runs only as far as needed.
Two paths
Most AI tools and OpusDraft are built to maximize different things.
Most AI writing tools
optimize for
- Output speed
- Novelty
- Ideation
- Generation volume
- Improvisation
OpusDraft
optimizes for
- Compliance
- Consistency
- Memory
- Structure
- Restraint
One approach improvises. The other follows the work.
What makes OpusDraft different
Seven behaviours you can see on screen, not marketing lines.
Preservation
Your locked facts go to the model as hard rules on every action, and the draft is audited against them — not dropped in as optional context.
Verification
The draft is audited against your rules before you see it, and the panel reports what was repaired and what was left unfixed.
Refusal
Presentation projects carry hard rules telling it to leave a placeholder for a verse, citation or statistic it was not given, rather than fill the gap.
Restraint
When your prose is already right, it returns "No changes needed" — and tells you why.
Inheritance
Your decisions travel across every book in a series. Book 3 sees what you locked in Book 1.
Reversibility
Every AI edit is snapshotted with a side-by-side diff. One-click restore, itself reversible.
Trust UX
Enforcement you can see: Apply/Discard panels, drift indicators, refusal banners, Cmd+K search.
Books. Sermons. Keynotes. Pitches.
One engine, two modes. Novels see “Canon.” Sermons see “Facts.” Same enforcement — the right language for long-form work where every detail has to hold. Fantasy and series writers feel it first: the more world you build, the more there is to keep from breaking.
What OpusDraft is not
It’s not a one-click novel writer. It won’t write a book while you sleep.
It’s for people who want to write their own work — with AI doing what it’s good at: drafting, tightening, polishing, catching breaks. You keep the voice, the vision, and every final call. No prompts. No reminders. No babysitting. It works from your rules and audits itself before it answers.

“I’m not a guru. I’m a writer who got tired of fixing the AI instead of writing. So I built a system that holds your canon, rules, and sources in front of the AI on every action — and checks what comes back against them.”
— Paul, Founder of OpusDraft
Stop policing the AI. Start finishing the work.
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