# CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

## Build & Test Commands

```bash
# Build
xcodebuild -project PlantGuide.xcodeproj -scheme PlantGuide -configuration Debug

# Run all tests
xcodebuild test -project PlantGuide.xcodeproj -scheme PlantGuide -destination 'platform=iOS Simulator,name=iPhone 17'

# Run a single test class
xcodebuild test -project PlantGuide.xcodeproj -scheme PlantGuide -destination 'platform=iOS Simulator,name=iPhone 17' -only-testing:PlantGuideTests/HybridIdentificationUseCaseTests

# Run a single test method
xcodebuild test -project PlantGuide.xcodeproj -scheme PlantGuide -destination 'platform=iOS Simulator,name=iPhone 17' -only-testing:PlantGuideTests/SavePlantUseCaseTests/testSavePlant_Success

# Build UI tests only (compile check, no simulator required)
xcodebuild build-for-testing -project PlantGuide.xcodeproj -scheme PlantGuide -destination 'platform=iOS Simulator,name=iPhone 17' -quiet

# Run all UI tests
xcodebuild test -project PlantGuide.xcodeproj -scheme PlantGuide -destination 'platform=iOS Simulator,name=iPhone 17' -only-testing:PlantGuideUITests
```

## App Structure

**Tab Navigation**: Camera | Collection | Today | Settings

### Implemented Features

- **Plant Identification** - Camera-based plant ID using on-device ML + PlantNet API fallback
- **Plant Collection** - Save identified plants with care schedules
- **Plant Rooms/Zones** - Organize plants by room (Kitchen, Living Room, Bedroom, etc.)
- **Today View** - Dashboard showing overdue + today's care tasks grouped by room
- **Progress Photos** - Capture growth photos with time-lapse playback and photo reminders
- **Care Scheduling** - Watering, fertilizing, repotting, pruning, pest control tasks
- **Notifications** - Local notifications for care reminders and photo reminders
- **CloudKit Sync** - iCloud sync via NSPersistentCloudKitContainer
- **Dark Mode** - System-following color scheme with semantic color tokens

## Architecture

**Clean Architecture + MVVM** with three main layers:

```
Presentation (SwiftUI Views + ViewModels)
    ↓
Domain (Use Cases + Entities + Repository Protocols)
    ↓
Data (Repository Implementations + Data Sources)
```

### Key Patterns

- **Dependency Injection**: `DIContainer` (singleton) provides all dependencies via `LazyService<T>` wrappers
- **Use Cases**: Each user action is a separate use case class (e.g., `SavePlantUseCase`, `HybridIdentificationUseCase`)
- **Repository Pattern**: Protocols in Domain layer, implementations in Data layer
- **Actor-based Concurrency**: `PlantClassificationService`, `NotificationService`, and Core Data background tasks use actors
- **ViewModels**: `@MainActor @Observable` classes, created via `DIContainer.makeXxxViewModel()`
- **Core Data + CloudKit**: `NSPersistentCloudKitContainer` with async store loading and `waitForStoreLoaded()` pattern

### Data Flow Example

```
CameraView → IdentificationViewModel → HybridIdentificationUseCase
    → PlantClassificationService (on-device ML)
    → PlantNetAPIService (online fallback)
    → IdentificationView (results)
```

### Directory Structure

- `App/` - Entry point, configuration, API keys
- `Core/DI/` - DIContainer and LazyService
- `Core/DesignSystem/` - Color tokens, animations, appearance management
- `Core/Services/` - NotificationService
- `Domain/` - Business logic: Entities, UseCases, RepositoryInterfaces
- `Data/` - Persistence: CoreData, Repositories, API services, Mappers
- `ML/` - Core ML inference service and image preprocessing
- `Presentation/` - SwiftUI views, ViewModels, navigation
  - `Scenes/` - Feature-specific views (Camera, Collection, Today, Settings, ProgressPhotos, Rooms)
  - `Common/` - Shared components and modifiers

## External Services

- **PlantNet API** (`my.plantnet.org`) - Plant identification via image upload (500 free/day)
- **Trefle API** (`trefle.io`) - Botanical care data (400K+ species)
- **CloudKit** - iCloud sync for plants, rooms, care tasks, and progress photos

API keys configured in `App/Configuration/APIKeys.swift` via environment variables.

## ML Model

PlantNet-300K ResNet50 for on-device plant classification:
- Input: 224x224 RGB image with ImageNet normalization
- Output: 1,081 plant species probabilities
- Conversion scripts in `scripts/` directory

## Core Data Model

Entities (all CloudKit-compatible with optional attributes):
- `PlantMO` - Plant records with identification data
- `RoomMO` - User-created rooms/zones
- `CareScheduleMO` - Care schedule configuration per plant
- `CareTaskMO` - Individual care tasks (watering, fertilizing, etc.)
- `ProgressPhotoMO` - Progress photos with thumbnails
- `IdentificationMO` - Plant identification history
- `PlantCareInfoMO` - Cached care information from APIs

## Testing

- Unit tests in `PlantGuideTests/` with mock implementations in `Mocks/`
- Test fixtures available for `Plant`, `CareTask`, `PlantCareSchedule`
- Mock services: `MockPlantCollectionRepository`, `MockNetworkService`, etc.
- In-memory Core Data stack for test isolation: `CoreDataStack(inMemory: true)`

### UI Testing

UI tests live in `PlantGuideUITests/` using a page-object foundation. See [Docs/XCUITest-Authoring.md](Docs/XCUITest-Authoring.md) for the full guide.

**Key patterns:**
- Inherit `BaseUITestCase`, not `XCTestCase`
- Launch with `launchClean()`, `launchWithMockData()`, or `launchOffline()`
- Locate elements via `UITestID.*` identifiers (mirrors `AccessibilityIdentifiers` in app)
- Navigate with screen objects: `TabBarScreen`, `CameraScreen`, `CollectionScreen`, `TodayScreen`, `SettingsScreen`, `PlantDetailScreen`
- Wait with `waitForExistence(timeout:)`, `waitUntilHittable()`, `waitUntilGone()` -- never `sleep()`
- One assertion focus per test method

## Claude GitHub App

### Installation
1. Go to [github.com/apps/claude](https://github.com/apps/claude)
2. Click "Install" and select this repository
3. Grant the requested permissions (read/write for code, issues, and pull requests)
4. Authenticate with your Anthropic account when prompted

### How It Works
- The app reads this `CLAUDE.md` file for project context and contribution rules
- Claude responds to `@claude` mentions in issues and PRs
- No API key configuration needed - authentication is handled through the GitHub App integration

### Triggering Claude
- **Issues**: Mention `@claude` in an issue to request implementation help
- **PRs**: Mention `@claude` to request code review or changes

## Claude Contribution Rules

### Scope
- Work ONLY on the issue explicitly assigned to you.
- One issue = one pull request.
- Do not refactor unrelated code.
- Do not change public APIs unless the issue explicitly says so.

### Safety Rules
- Never auto-merge.
- Never force-push to main.
- Never delete code unless instructed.
- Preserve existing behavior unless tests say otherwise.

### iOS Rules
- Respect Swift concurrency (MainActor, async/await).
- Do not introduce Combine unless already used.
- Prefer pure functions for new logic.
- No new dependencies without approval.

### Output Expectations
Each PR must include:
- Clear summary of changes
- Files touched (with rationale)
- Risks and how to test