dev-skill

# Dev Skill - SwiftUI iOS Development Generator ## Overview This skill transforms Product Requirements Documents (PRD) into fully functional SwiftUI iOS applications. It analyzes PRD requirements and generates production-ready code with proper architecture, UI components, data models, and business logic. ## Architecture Pattern ### MVVM Architecture All generated code follows the Model-View-ViewModel pattern: #### Model Layer - Data models (structs conforming to Codable) - Data persistence (Core Data or SwiftData) - Network layer (URLSession or Alamofire) #### ViewModel Layer - Business logic and state management - Data transformation and validation - Service coordination #### View Layer - SwiftUI views with proper componentization - Navigation stack management - UI state binding ## Code Generation Workflow ### 1. PRD Analysis - Parse PRD document for functional requirements - Extract screen specifications and user flows - Identify data models and relationships - Determine required third-party integrations ### 2. Project Structure Generation Create a complete Xcode project with: ``` ProjectName/ ├── ProjectName.xcodeproj ├── ProjectName/ │ ├── Models/ │ │ ├── DataModel.swift │ │ └── APIModels.swift │ ├── ViewModels/ │ │ ├── MainViewModel.swift │ │ └── [Feature]ViewModel.swift │ ├── Views/ │ │ ├── ContentView.swift │ │ ├── [Feature]View.swift │ │ └── Components/ │ │ ├── ButtonStyles.swift │ │ └── CustomViews.swift │ ├── Services/ │ │ ├── APIService.swift │ │ └── DataService.swift │ └── Utilities/ │ ├── Extensions.swift │ └── Constants.swift └── ProjectNameTests/ └── [Feature]Tests.swift ``` ### 3. Core Components Generation #### 3.1 Data Models ```swift struct Task: Identifiable, Codable { let id: UUID var title: String var isCompleted: Bool var dueDate: Date? var category: String var priority: Priority } enum Priority: String, Codable, CaseIterable { case low, medium, high } ``` #### 3.2 ViewModels ```swift class TaskViewModel: ObservableObject { @Published var tasks: [Task] = [] @Published var selectedCategory: String? private let dataService: DataService init(dataService: DataService = .shared) { self.dataService = dataService loadTasks() } func addTask(_ task: Task) { ... } func deleteTask(_ task: Task) { ... } func toggleCompletion(_ task: Task) { ... } } ``` #### 3.3 SwiftUI Views ```swift struct TaskListView: View { @StateObject private var viewModel = TaskViewModel() @State private var showingAddTask = false var body: some View { NavigationView { List { ForEach(viewModel.tasks) { task in TaskRowView(task: task) } .onDelete(perform: deleteTask) } .navigationTitle("Tasks") .toolbar { Button(action: { showingAddTask = true }) { Image(systemName: "plus") } } .sheet(isPresented: $showingAddTask) { AddTaskView() } } } } ``` ### 4. Feature Implementation #### 4.1 Navigation - TabView for main navigation - NavigationStack for hierarchical navigation - Sheet presentations for modal views #### 4.2 Data Persistence - Core Data for complex relationships - @AppStorage for simple preferences - FileManager for document storage #### 4.3 Networking - Async/Await for modern API calls - Error handling with Result type - JSON decoding with Codable #### 4.4 UI/UX - Adaptive layout for all device sizes - Dark mode support - Accessibility features - Haptic feedback ## Example: Todo App from PRD **PRD Input:** Todo app with categories, reminders, sharing **Generated Code:** 1. **Models**: Task, Category, Reminder 2. **ViewModels**: TaskListViewModel, CategoryViewModel 3. **Views**: TaskListView, CategoryView, AddTaskView, SettingsView 4. **Services**: NotificationService, SharingService 5. **Features**: - Push notifications for reminders - Share sheet integration - iCloud sync for data - Widgets for quick access ## Auto-Trigger Next Steps After generating the iOS project, this skill automatically: 1. Creates a complete Xcode project in `dev-output/` directory 2. Verifies code compiles without errors 3. Triggers `qa-skill` with the generated code as input 4. Provides build instructions and next steps ## Integration Requirements ### Input Format - PRD markdown document from `prd-skill` - Structured requirements with priorities - Technical specifications and constraints ### Output Validation - All code must compile in Xcode 15+ - Follows SwiftUI best practices - Includes proper error handling - Supports iOS 16+ deployment target ### Quality Standards - 100% SwiftUI (no UIKit unless absolutely necessary) - Proper separation of concerns - Comprehensive documentation - Follows Apple's Human Interface Guidelines