A minimal iOS app that converts natural language text into calendar events using on-device LLM.

T2C lets you create calendar events by typing natural language like "Lunch with Alex next Tue 1pm @Shibuya". The app uses FoundationModels for on-device parsing and write-only EventKit access for privacy-preserving calendar integration.

• iOS 17+ (for write-only calendar access)
• Xcode 15+
• Swift 5.9+

xcodebuild -project T2C.xcodeproj -scheme T2C -configuration Debug build

Three-layer design:

• UI Layer: SwiftUI single-screen interface
• Business Logic: State machine orchestration (MainViewModel)
• Services: NLParser (FoundationModels guided generation), CalendarService (EventKit)

• On-device LLM with guided generation (@Generable macro)
• Write-only calendar access (no read permissions)
• Timezone-aware ISO-8601 date handling
• Privacy-first design

MIT