SwiftData — Foundations Skill

Purpose

Route SwiftData implementation tasks to the minimum required SwiftData Knowledge Contracts. v1 scope is declaring @Model classes and their attributes/relationships, setting up and injecting a ModelContainer, performing CRUD through a ModelContext, fetching with @Query or FetchDescriptor, and delete-rule/referential-integrity behavior on relationships -- not CloudKit sync, not schema migration, not Core Data interop, and not the #Index/#Unique macros beyond a basic mention.

Routing

Load only the contracts relevant to the task. All paths relative to knowledge/swiftdata/.