Core Data — Foundations Skill

Purpose

Route Core Data implementation tasks to the minimum required Core Data Knowledge Contracts. v1 scope is subclassing NSManagedObject and choosing an .xcdatamodeld Codegen mode with @NSManaged properties, standing up and loading an NSPersistentContainer, performing CRUD through an NSManagedObjectContext with basic thread confinement and a basic parent-child context relationship, fetching with NSFetchRequest/ @FetchRequest, and NSDeleteRule/inverse-relationship referential integrity -- not CloudKit sync, not migration, not NSFetchedResultsController, not advanced multi-context concurrency, and not SwiftData interop.

Routing

Load only the contracts relevant to the task. All paths relative to knowledge/core-data/.