Multiplatform

Ghost targets 5 platforms from a single codebase using Tauri v2’s conditional compilation.

Platform Matrix

Platform	Status	Build Target	Package
Windows x64	✅	x86_64-pc-windows-msvc	NSIS installer
macOS ARM64	✅	aarch64-apple-darwin	DMG
macOS Intel	✅	x86_64-apple-darwin	DMG
Linux x64	✅	x86_64-unknown-linux-gnu	DEB, RPM, AppImage
Android ARM64	✅	aarch64-linux-android	APK
iOS ARM64	🔧	aarch64-apple-ios	xcarchive

Conditional Compilation

Ghost uses Tauri’s #[cfg(desktop)] and #[cfg(mobile)] macros:

// Desktop-only: file watcher, system tray, MCP stdio
#[cfg(desktop)]
pub fn start_file_watcher() -> Result<()> { ... }

// Mobile stub: return Ok or clear error
#[cfg(mobile)]
pub fn start_file_watcher() -> Result<()> {
    Ok(()) // Not supported on mobile
}

Desktop-Only Features

• File system watcher (notify crate)
• System tray icon + menu
• Global keyboard shortcuts
• MCP stdio transport
• Native chat engine (llama-cpp-2)

Mobile Adaptations

• 44px+ touch targets (@media (pointer: coarse))
• Safe area padding for notch/home indicator
• h-dvh instead of h-screen for dynamic viewport
• Full-screen settings (no floating modals)
• Platform detection via usePlatform() hook

TLS Strategy

Ghost uses 100% rustls — no OpenSSL:

# Cargo.toml — all HTTP crates use rustls
reqwest = { version = "0.12", features = ["rustls-tls"] }
hf-hub = { version = "0.4", features = ["rustls-tls"] }

This eliminates Android NDK cross-compilation failures with OpenSSL.

Capabilities Split

Tauri permissions are split per platform:

• default.json — all platforms (core IPC)
• desktop.json — file system, tray, shortcuts
• mobile.json — haptics, safe area APIs

CI/CD

All platforms build automatically via GitHub Actions on every release:

• Windows, macOS (ARM+Intel), Linux → Desktop builds
• Android → APK with optional signing
• iOS → Unsigned xcarchive (sideloadable via AltStore)