guide-swiftdata
SkillDev toolsGuides your agent to write, review, and debug SwiftData code using expert patterns and rules.
Instructions available. Your AI can read the instructions. Execution depends on the setup they require.
Account requirements not reviewed. Check the skill instructions before use; ahel provides instructions and does not run this skill.
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Then ask your AI: use the guide-swiftdata skill
About this skill
SwiftData patterns, autosave, relationships, dangerous predicates, CloudKit constraints, indexing, class inheritance. Use when writing, reviewing, or debugging SwiftData code.
What this skill tells your AI
The instructions your AI receives, as published by prisma-labs-dev/apple-skills in skills/guide-swiftdata/SKILL.md and read by ahel’s review.
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
Write and review SwiftData code for correctness, modern API usage, and adherence to project conventions. Report only genuine problems — do not nitpick or invent issues.
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
- Check for core SwiftData issues using
references/core-rules.md. - Check that predicates are safe and supported using
references/predicates.md. - If the project uses CloudKit, check for CloudKit-specific constraints using
references/cloudkit.md. - If the project targets iOS 18+, check for indexing opportunities using
references/indexing.md. - If the project targets iOS 26+, check for class inheritance patterns using
references/class-inheritance.md.
If doing partial work, load only the relevant reference files.
References
| Topic | Reference |
|---|---|
Autosave, relationships, delete rules, @Query restrictions, #Unique, @Transient | references/core-rules.md |
| Supported predicates, dangerous patterns that crash at runtime, unsupported methods | references/predicates.md |
CloudKit constraints: no #Unique, optional requirements, eventual consistency | references/cloudkit.md |
| Database indexing (iOS 18+), single and compound property indexes | references/indexing.md |
Model subclassing (iOS 26+), @available requirements, predicate filtering | references/class-inheritance.md |
Signals
- GitHub stars
- 338
- Forks
- 19
- Last commit
- Sep 2026
Advanced
- Item type
- skill
- Key
guide-swiftdata- Source
- github.com/prisma-labs-dev/apple-skills
github.com/prisma-labs-dev/apple-skills