I built an AI that writes full-length novels with consistent characters

Hey ! I've been building Novarrium (https://novarrium.com) — an AI-powered platform that helps writers create full-length novels, not just a page or two.

The problem I'm solving:

Most AI writing tools hit a wall after a few pages. Characters change personality, plot threads get dropped, and the writing voice drifts. Anyone who's tried to write a 20+ chapter novel with ChatGPT knows the pain.

How Novarrium is different:

The core innovation is a "Story Bible" — a living database that tracks every character, location, relationship, and plot thread. As each chapter is generated, the AI references this context so Chapter 20 stays consistent with Chapter 1.

Other key features:

Voice matching: upload a writing sample and the AI adapts to your style
Import your own outline or let the AI build one from a concept
Built-in editor for reviewing and polishing chapters
Export to EPUB and DOCX when you're ready to publish

The stack (for the nerds):

Next.js + TypeScript on Vercel
FastAPI + Python on Railway
Claude Sonnet (Anthropic) for generation
Supabase (PostgreSQL)
Stripe for payments

Where I'm at:

Live in production, real users creating novels across genres
Solo founder, bootstrapped
Just launched an affiliate program

Biggest lesson so far:

The hardest part wasn't the AI — it was maintaining consistency across 60,000+ words. Every time a character appears, the AI needs to remember their eye color, their backstory, their speech patterns. Building that context management system was the real engineering challenge.

Would love to hear from anyone who writes fiction or has built AI content tools. What would make you try something like this?

Check it out: https://novarrium.com