swiftdata-macos

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.