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swift-data

SwiftData persistence and data-layer architecture for iOS 26 / Swift 6.2 clinic modular MVVM-C apps. Use when writing, reviewing, or refactoring @Model entities, repository implementations, stale-while-revalidate reads, optimistic queued writes, sync/retry behavior, and SwiftUI integration that keeps SwiftData types inside Data-only boundaries.

skills/.experimental/swift-data/SKILL.md

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# SwiftData Best Practices — Modular MVVM-C Data Layer

Comprehensive data modeling, persistence, sync architecture, and error handling guide for SwiftData aligned with the clinic modular MVVM-C stack.

## Architecture Alignment

This skill enforces the same modular architecture mandated by `swift-ui-architect`:

```
┌───────────────────────────────────────────────────────────────┐
│ Feature modules: View + ViewModel, no SwiftData imports       │
├───────────────────────────────────────────────────────────────┤
│ Domain: models + repository/coordinator/error protocols        │
├───────────────────────────────────────────────────────────────┤