SwiftData skills — class inheritance patterns for hierarchical models, type-based querying, polymorphic relationships, and inheritance-vs-enum decisions. Use when designing SwiftData model hierarchies.
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---
name: swiftdata
description: SwiftData skills — class inheritance patterns for hierarchical models, type-based querying, polymorphic relationships, and inheritance-vs-enum decisions. Use when designing SwiftData model hierarchies.
allowed-tools: [Read, Glob, Grep]
last_verified: 2026-07-16
review_by: 2027-06-22
---
# SwiftData Skills
SwiftData modeling patterns beyond the basics.
## When This Skill Activates
Use this skill when the user:
- Designs **hierarchical SwiftData models** (class inheritance)
- Needs **type-based or polymorphic queries**
- Weighs **inheritance vs enum** for model variants
## Available Skills
Paths are relative to THIS file's directory — skills run with cwd set to the
user's project, so resolve each path from this SKILL.md's own location.
| Skill | Read | Covers |
|-------|------|--------|
| inheritance | `inheritance/SKILL.md` | Class inheritance, polymorphic relationships, type-based querying, inheritance-vs-enum |
## How to Route
1. Read `inheritance/SKILL.md` (relative to this file) plus any reference files it lists.
2. Apply the guidance to the user's code. For broader macOS SwiftData architecture, see also `../macos/swiftdata-architecture/SKILL.md`.
