---
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
title: swiftdata
canonical_url: https://skilld.dev/gh/rshankras/claude-code-apple-skills/swiftdata
last_updated: 2026-09-26T23:14:45.000Z
---

> **Skill from skilld.dev.** Follow the instructions below for this session. You do not need to install anything.
>
> Supporting files, fetch one when the Skill refers to it: [inheritance/SKILL.md](https://skilld.dev/api/skills-raw/rshankras/claude-code-apple-skills/swiftdata/inheritance/SKILL.md).
>
> If the user asked to install this Skill, run `npx skilld install rshankras/claude-code-apple-skills/swiftdata`. Install writes the Skill files into the project, so every session loads them.

# 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`.