core-data-macos

What problem does it solve?

Core Data is Apple's standard persistence framework, but implementing a production-ready, macOS-specific stack with features like CloudKit sync, multi-process access, and efficient batch operations requires deep platform knowledge and careful handling of edge cases like migration failures and memory management. This Skill eliminates that friction by providing vetted, macOS-optimized patterns for all Core Data workflows.

Core Features & Use Cases

• Production Stack Setup: Configure NSPersistentContainer with lightweight migration, background contexts, and proper merge policies tailored for macOS apps.
• Advanced Data Operations: Implement batch updates/deletes, NSFetchedResultsController integration with NSTableView, and staged migrations for complex model version changes.
• Cross-Process & Cloud Sync: Enable multi-process data access via history tracking and CloudKit sync with conflict resolution for macOS apps that share data across extensions, XPC services, or multiple app instances.
• Use Case: For a macOS project management app that syncs data across a main app, widget, and XPC service, use this Skill to set up a shared Core Data store with history tracking and CloudKit sync to keep all processes consistent.

Quick Start

Use the core-data-macos skill to configure a production-ready Core Data stack with CloudKit sync and batch operations for your macOS application.