swiftdata

Persist and manage SwiftData @Model classes with ModelContainer and @Query for iOS apps.

Updated Aug 23, 2026
One-click install
npx skills add https://github.com/KumarAdi8/AgentKit --skill swiftdata-kumaradi8
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: swiftdata
Source: https://github.com/KumarAdi8/AgentKit/tree/main/skills/swiftdata
Command: npx skills add https://github.com/KumarAdi8/AgentKit --skill swiftdata-kumaradi8

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

## What problem does it solve? SwiftData simplifies persisting, querying, and migrating structured app data so developers no longer manage low-level SQLite wiring, manual schema transformations, or brittle Core Data interoperability by hand.

## Core Features & Use Cases

  • Model authoring: Define reference-model classes with attribute options, relationships, transient state, uniqueness, and indexing for reliable storage and querying.
  • Reactive queries & UI integration: Use @Query, FetchDescriptor, and SortDescriptor patterns to drive SwiftUI lists, previews, and dynamic searches.
  • Transactions, batching & concurrency: Perform atomic transactions, batched enumeration for large datasets, and isolate background work via @ModelActor while exchanging persistent identifiers across actors.
  • Migrations & coexistence: Plan VersionedSchema and SchemaMigrationPlan stages, perform lightweight and custom migrations, and safely coexist or migrate from Core Data including CloudKit-aware model design.
  • Performance & sync: Optimize large-data imports, external storage for large blobs, history tracking, and CloudKit configuration for synced or local-only stores.

### Quick Start Create @Model classes for your entities, attach a ModelContainer to the SwiftUI scene, and use @Query or ModelContext to insert, fetch, update, and save records.

Frequently Asked Questions about swiftdata

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I set up SwiftData persistence in an iOS app?▼

To set up SwiftData persistence, define @Model classes for your data structures, attach a ModelContainer to your SwiftUI scene, and use @Query or ModelContext to insert, fetch, and save records.

How do I handle SwiftData migrations when changing my schema?▼

SwiftData migrations require defining VersionedSchema stages and a SchemaMigrationPlan to perform lightweight or custom migrations, ensuring safe schema transformations and updates without data loss.

Can I use SwiftData with CloudKit for syncing?▼

Yes, SwiftData supports CloudKit sync by applying CloudKit-compatible configurations to your ModelContainer, enabling synced or local-only stores for your iOS application data.

What is the best way to drive SwiftUI views with SwiftData queries?▼

The best way to drive SwiftUI views is using @Query with FetchDescriptor and SortDescriptor patterns, which dynamically fetch, filter, and sort structured app data to populate lists and previews.

How do I optimize SwiftData performance for large data imports?▼

Optimize SwiftData large data imports by using batched enumeration, external storage for large blobs, history tracking, and transaction semantics to ensure atomic operations and reliable performance.