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swiftdata-macos

Configure SwiftData ModelContainer with CloudKit sync and schema migrations for macOS apps.

1|Updated Jun 5, 2026
Search Tags:#macos#persistence#swiftdata#cloudkit#schema-migration#data-sync#multi-window
One-click install
npx skills add https://github.com/LaughingJackalope/macos-skills --skill swiftdata-macos
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: swiftdata-macos
Source: https://github.com/LaughingJackalope/macos-skills/tree/main/swiftdata-macos
Command: npx skills add https://github.com/LaughingJackalope/macos-skills --skill swiftdata-macos

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill eliminates the complexity of implementing robust, production-ready persistent data storage for macOS 26+ applications using SwiftData, addressing common pain points like CloudKit sync configuration, schema migration handling, multi-window data consistency, and performance optimization for large datasets.

Core Features & Use Cases

  • SwiftData Model & Query Configuration: Define type-safe @Model classes with attributes, relationships, and indexes, and use #Predicate for efficient, compile-time checked data filtering.
  • Cross-Context Data Sharing: Share a single ModelContainer across multiple app windows for consistent data access, or create per-document containers for document-based macOS apps.
  • Sync, Migration & Performance: Configure CloudKit sync, handle additive and custom schema migrations, and implement batch operations for datasets with 10,000+ rows. Use Case: For a macOS project management app, use this Skill to set up shared task data across multiple windows, sync user tasks via CloudKit, and handle schema updates when adding new task properties without losing existing user data.

Quick Start

Use the swiftdata-macos skill to configure a shared SwiftData ModelContainer for my macOS app's multi-window project management interface, set up CloudKit sync for user task data, and implement schema migrations for new model properties without losing existing user data.

Frequently Asked Questions about swiftdata-macos

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

FAQPage Schema
How do I configure a SwiftData ModelContainer for multi-window data sharing in macOS?▼

To configure SwiftData multi-window data sharing on macOS, instantiate a single ModelContainer and pass it to multiple windows. This ensures consistent data access across the application interface without creating separate storage contexts.

What is the best way to handle SwiftData schema migration without losing existing user data?▼

SwiftData schema migration without data loss requires mapping old attribute versions to new ones using additive and custom migration plans. This updates your @Model class definitions while preserving previously stored user records.

Can I sync SwiftData with CloudKit for macOS apps?▼

Yes, SwiftData syncs with CloudKit for macOS applications by configuring the ModelContainer to use a CloudKit-backed store. This synchronizes user data across devices automatically using the CloudKit framework.

How do I optimize SwiftData performance for datasets exceeding 10,000 rows?▼

SwiftData performance for large datasets exceeding 10,000 rows is optimized using batch insert and batch delete operations. This minimizes memory overhead by processing bulk data changes directly within the ModelContext.

Does SwiftData support XPC cross-process data propagation?▼

Yes, SwiftData supports XPC cross-process data propagation by integrating NSPersistentHistoryTracking. This mechanism tracks and propagates data changes across different processes sharing the same persistent storage.

How do I use #Predicate for compile-time checked data filtering in SwiftData?▼

Use the #Predicate macro with @Query in SwiftData to filter data with compile-time checking. This ensures type-safe filtering logic is validated during compilation, preventing runtime data fetch errors.

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