Mythpen

AI-assisted novel writing desktop app — characters, world-building, chapters, foreshadowing, timelines, with integrated AI writing assistant.

Feature

• AI Writing — Two modes: Writing (guided 6-step workflow) and Collab (AI co-writer). Supports OpenAI and Claude.
• Novel Management — Characters, world-building, chapters, foreshadowing, timeline, and relations — all in one place.
• Local-First — Data stored in SQLite under ~/.mythpen/. No cloud required, full privacy.
• Rich Editor — Bold, italic, underline via keyboard shortcuts. Chapters auto-save locally.
• Cross-Platform — Tauri v2 for native desktop experience, also runs in browser for development.

Prerequisites

• Node.js >= 20
• pnpm >= 9

Quick Start

pnpm install        # Install dependencies
pnpm dev:all        # Start in browser (frontend + backend + seed data)
pnpm tauri dev      # Desktop development mode
pnpm tauri build    # Build desktop installer (.dmg/.msi/.AppImage)

Tech Stack

Frontend: React 19 + TypeScript 5 + Zustand
Backend: Express 5 + better-sqlite3
Desktop: Tauri v2
AI: OpenAI-compatible

License

GPLv3