Settings
Manage your book's identity, the style profile the assistant learns from, and how Author OS is powered.
Book settings
Author style profile
The Style Model continuously learns your tone, voice, and pacing from the manuscript itself — every chapter you write refines it. It is never edited directly; it is a living reflection of your prose, referenced by every assistant mode to keep generated text, grammar suggestions, and character voices consistent with how you actually write.
AI engine
Set OPENAI_API_KEY in your environment to enable the live engine for chat, extraction, and grammar review. Without it, Author OS falls back to a deterministic local engine so every screen still works offline — responses will be simpler and rule-based rather than model-generated.
These preferences are local to this session for now — they don't yet persist to the backend.
Data backend
Author OS uses Supabase for persistence, file storage, and auth when it is configured. If no Supabase project is connected, it transparently falls back to a local in-memory store so you can explore the app without any setup.
To connect Supabase, run npm run setup:supabase and follow the prompts to provision your schema and storage buckets.
Appearance
Light and dark theme are available from the toggle in the top bar, so your reading and writing surface adapts to the room you're in.