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core-data

Manage and optimize Core Data persistence in iOS applications.

Updated Jul 12, 2026
Search Tags:#database#swift#ios#persistence#modeling#core data
One-click install
npx skills add https://github.com/yashpalsince2004/National_academy_app --skill core-data-yashpalsince2004
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: core-data
Source: https://github.com/yashpalsince2004/National_academy_app/tree/main/Mobile/.agents/skills/core-data
Command: npx skills add https://github.com/yashpalsince2004/National_academy_app --skill core-data-yashpalsince2004

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill unit streamlines the process of building, reviewing, and improving Core Data persistence in iOS apps, eliminating the complexities of NSManagedObject subclasses, NSFetchedResultsController, and other related features.

Core Features & Use Cases

  • Stack Setup: Provides a comprehensive guide for initializing and managing the Core Data stack using NSPersistentContainer.
  • Concurrency and Threading: Integrates Swift Concurrency with Core Data for efficient background operations.
  • NSFetchedResultsController: Offers detailed instructions on using NSFetchedResultsController for list-driven UIs.
  • Batch Operations: Explains how to perform bulk operations using NSBatchInsertRequest, NSBatchDeleteRequest, and NSBatchUpdateRequest.
  • Persistent History Tracking: Guides on enabling and utilizing persistent history tracking for store-level changes.
  • Staged Migration: Describes how to perform staged schema migrations with NSStagedMigrationManager.
  • Composite Attributes: Covers the implementation of composite attributes on entities.
  • SwiftData Boundary: Provides guidance for Core Data + SwiftData coexistence and migration.
  • Testing: Offers insights into testing Core Data with in-memory stores.
  • Common Mistakes: Lists and explains common mistakes in Core Data usage to avoid in production.
  • Review Checklist: A comprehensive checklist for reviewing Core Data implementations.

Quick Start

Use the core-data skill to review the Core Data stack configuration in your app by running 'core-data review-stack'.

Frequently Asked Questions about core-data

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

FAQPage Schema
How do I set up and manage the Core Data stack in an iOS app?▼

To set up the Core Data stack, initialize and configure the persistent container using NSPersistentContainer. This approach streamlines stack management and integrates Swift Concurrency for efficient background operations.

How do I perform bulk operations in Core Data?▼

Perform Core Data bulk operations using NSBatchInsertRequest, NSBatchDeleteRequest, and NSBatchUpdateRequest. These batch requests allow you to execute large-scale data modifications efficiently directly against the persistent store.

What is the best way to handle Core Data schema migrations?▼

The best way to handle Core Data schema migrations is using NSStagedMigrationManager. This performs staged schema migrations, ensuring smooth transitions between database versions without data loss.

Can I use SwiftData alongside Core Data in the same application?▼

Yes, you can use SwiftData alongside Core Data. The Skill provides specific guidance for Core Data and SwiftData coexistence, including boundary management and migration strategies between the two persistence frameworks.

How do I use NSFetchedResultsController for list-driven UIs in iOS?▼

Use NSFetchedResultsController to efficiently manage and display Core Data results in list-driven UIs. It tracks data changes and automatically updates table view sections and rows.

What are common mistakes to avoid when using Core Data in production?▼

Common Core Data mistakes to avoid in production include improper threading concurrency and mismanaged batch operations. The Skill lists these common pitfalls and provides a comprehensive review checklist for validating implementations.

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