Uses RSVP (Rapid Serial Visual Presentation) to flash words at configurable speeds. Everything runs client-side, your documents never leave your browser.

Features

• RSVP engine with adjustable WPM (100-1000)
• Word grouping: display 1, 3, 5, 10, or 20 words per flash
• ORP (Optimal Recognition Point) highlighting in amber for faster recognition
• Document library with IndexedDB storage and AES-GCM encryption
• Supports PDF, TXT, DOCX, and Markdown
• Fullscreen mode for distraction-free reading
• Full keyboard shortcut support
• Dark theme with void black background and amber accents

Tech Stack

• Language: Rust
• Framework: Leptos 0.8 (CSR)
• Compilation: WebAssembly via wasm-bindgen
• Build: Trunk
• Storage: IndexedDB with AES-GCM encryption
• PDF parsing: pdf.js 4.0
• DOCX parsing: JSZip 3.10
• Sanitization: ammonia (XSS prevention)
• Deployment: Vercel with auto-deploy
• Typography: Space Grotesk

Quick Start

Prerequisites:

• Rust (stable)
• wasm32-unknown-unknown target
• Trunk

git clone https://github.com/JDRV-space/nabu.git
cd nabu

rustup target add wasm32-unknown-unknown
cargo install trunk

trunk serve

App runs at http://127.0.0.1:8080

For production: ./scripts/build.sh (output in dist/)

Keyboard Shortcuts

Key	Action
Space	Play/Pause
Left/Right	Adjust WPM by 50
Up/Down	Adjust WPM by 10
R	Restart
F	Fullscreen
ESC	Exit reader

Project Structure

nabu/
├── src/
│   ├── main.rs              # Entry point
│   ├── components/          # reader, library, settings, controls, upload
│   ├── state/               # Application state and signals
│   ├── storage/             # IndexedDB + encryption
│   └── parser/              # PDF, DOCX, TXT, MD parsing
├── docs/SPEC.md             # Full specification
├── scripts/                 # Build scripts
├── index.html
├── style.css
├── Cargo.toml
├── Trunk.toml
├── vercel.json
└── LICENSE

Security

• XSS prevention via ammonia
• AES-GCM encryption for stored documents
• Magic bytes validation and size limits on uploads
• Strict CSP headers via Vercel
• No backend = no server-side attack surface

Contributing

PRs welcome. See CONTRIBUTING.md.

1. Fork the repo
2. Create feature branch
3. Commit changes
4. Push and open PR

Documentation

• Project Specification: design system, features, UI mockups

License

MIT. See LICENSE.

Author

Juan Diego Rodriguez @JDRV-space