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Implement, review, or improve data persistence using SwiftData.
Passed 22 of 22 test cases with the skill, and 18 of 22 without it.
and 3 more in the full report
4 fixed18 passed either way0 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.
We are converting our app's data layer from Core Data to SwiftData step-by-step while maintaining both systems in parallel during the transition. Please provide architectural guidance on setting up this dual-stack configuration. Ensure your output provides fundamental boundary rules before diving into detailed code migration instructions.
| Checked | Without skill | With skill |
|---|---|---|
| Advises configuring both stacks to reference the exact same SQLite store URL. | Missed | Passed |
| Advises using @Attribute(originalName:) for SwiftData properties whose persisted Core Data names differ. | Missed | Passed |
| Advises assigning a single stack as writer for each entity during coexistence. | Passed | Passed |
The instructions your model reads when the skill loads.
Persist, query, and manage structured data in iOS 26+ apps using SwiftData with Swift 6.3.
@Query in SwiftUI@ModelActor)Apply @Model to a class (not struct). It synthesizes PersistentModel
conformance. Model instances remain context/actor-bound; pass their
PersistentIdentifier, not the instance, across actors.
@Model
class Trip {
var name: String
var destination: String
var startDate: Date
var endDate: Date
var isFavorite: Bool = false
@Attribute(.externalStorage) var imageData: Data?
@Relationship(deleteRule: .cascade, inverse: \LivingAccommodation.trip)
var accommodation: LivingAccommodation?
@Transient var isSelected: Bool = false // Always provide default
test cases passed, vs 18 / 22 without
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