How does this skill handle Realm's threading model?

It provides specific patterns for converting Realm's manual thread-local instances and DispatchQueue logic into SwiftData's actor-based concurrency and background ModelContexts.

Does it provide a timeline for the migration process?

The guide includes a standard 4-phase migration plan covering planning, development, data migration, and production rollout, typically spanning 4 to 8 weeks.

Can this skill help with complex database relationships?

Yes, it covers one-to-many and many-to-many relationship mapping, including how to translate RealmSwiftCollection types into native Swift arrays with automatic inverse management.

Why is the migration from Realm to SwiftData critical now?

Realm Device Sync is scheduled for deprecation on September 30, 2025. Apps using this service must migrate to an alternative like SwiftData with CloudKit to maintain data synchronization.

Realm to SwiftData Migration Guide

Name: Realm to SwiftData Migration Guide
Author: CharlesWiltgen

byCharlesWiltgen

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233

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Mobile Development

Guides developers through migrating from Realm database to SwiftData with pattern mappings, threading conversion, and CloudKit sync strategies.

The axiom-realm-migration-ref skill provides a comprehensive reference and implementation framework for transitioning iOS and Apple platform applications from Realm to SwiftData. Designed to address the critical Realm Device Sync deprecation deadline of September 2025, it offers side-by-side code comparisons, automated threading conversions using Swift actors, and detailed schema migration phases for production-grade apps. Whether you are handling simple data stores or complex relational schemas with CloudKit synchronization, this skill ensures a safe and modern transition to Apple's native persistence framework.

主要功能

01Multi-phase migration strategies for transitioning production user data safely

02CloudKit synchronization setup and monitoring guides to replace Realm Device Sync

03Comprehensive timeline planning to meet the September 2025 deprecation deadline

04Detailed mapping of Realm threading models to modern Swift 6 actor-based concurrency

05233 GitHub stars

06Side-by-side Realm and SwiftData code comparisons for models, relationships, and indexes

使用场景

01Modernizing legacy iOS apps by replacing Realm with native SwiftData persistence

02Executing a data migration strategy before the Realm Device Sync sunset date

03Refactoring manual background threading to Swift 6 strict concurrency for local storage

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add charleswiltgen/axiom axiom-realm-migration-ref

For use in Claude.ai and ChatGPT

Download Skill