PrismDeck

Ultra-light deck shell for Prism Launcher. Rust + Tauri v2 · vanilla JS · one-file CSS themes · Linux & Windows.

PrismDeck does not replace Prism Launcher. It discovers your existing Prism install, reads your instances, launches them through Prism's CLI, and adds a fast, themeable deck UI on top. Everything that needs the full Prism GUI (accounts, modpack installers, Java management) is delegated back to Prism.

Status

Early development. Current milestone: M7 — packaging.

• Tauri v2 + vanilla frontend scaffold
• Prism discovery (native / Flatpak / portable / custom / data-only)
• instance.cfg + mmc-pack.json + groups parsing + icons
• launch engine with Gamescope / GameMode wrappers
• live stdout/stderr console with stop / force-stop
• instance deck UI (search, group filters, detail modal, onboarding)
• one-file CSS themes + hot reload
• settings persistence (selected install, theme, wrapper, launch options)
• Linux packaging (deb + AppImage)
• Windows MSI/NSIS packaging

No Prism installed? The app shows onboarding, a manual folder override, and can load the bundled fixtures/ demo deck (PRISMDECK_DEMO=1 auto-loads it in development).

See docs/MEMORY.md for measured memory usage.

Requirements

• Rust 1.77+ and Cargo
• Tauri v2 prerequisites for your OS
• Linux: webkit2gtk-4.1 (Arch: sudo pacman -S webkit2gtk-4.1)
• Prism Launcher installed if you want to launch instances

Development

# one-time: Tauri CLI
cargo install tauri-cli --version '^2' --locked

# run
cargo tauri dev

The app is a plain static frontend in ui/ — no Node.js, no bundler, no runtime framework. Tauri serves it directly.

Build

cargo tauri build

Artifacts land in src-tauri/target/release/bundle/.

Project layout

src-tauri/   Rust backend (discovery, parsing, launching, theme watcher)
ui/          static HTML/CSS/JS frontend
themes/      single-file CSS themes (loaded at runtime)
docs/        architecture and theming notes
fixtures/    fake Prism data for tests (no Prism install required)

Theming

A theme is one CSS file that can re-skin or completely re-arrange the app: five bundled themes range from a card grid to a terminal-style list to a dock layout. Edits hot-reload in development.

See docs/THEMES.md.

License

MIT. PrismDeck is unofficial and not affiliated with the Prism Launcher project. No Prism or Minecraft assets are bundled.