Guide Skill — This is an expert workflow/pattern guide, not API reference documentation. Originally from twostraws/SwiftData-Agent-Skill by Paul Hudson. MIT License.

SwiftData Patterns

Core Instructions

• Target Swift 6.2 or later, using modern Swift concurrency.
• Prefer SwiftData across the board. Do not suggest Core Data unless the feature cannot be solved with SwiftData.
• Do not introduce third-party frameworks without asking first.

Review Process

1. Check for core SwiftData issues using

   references/core-rules.md

   .
2. Check that predicates are safe and supported using

   references/predicates.md

   .
3. If the project uses CloudKit, check for CloudKit-specific constraints using

   references/cloudkit.md

   .
4. If the project targets iOS 18+, check for indexing opportunities using

   references/indexing.md

   .
5. If the project targets iOS 26+, check for class inheritance patterns using

   references/class-inheritance.md

   .

References

@Query

#Unique

@Transient

references/core-rules.md

references/predicates.md

#Unique

references/cloudkit.md

references/indexing.md

@available

references/class-inheritance.md