Summary
For apps still on Core Data rather than SwiftData, this covers the full persistence stack: setting up NSPersistentContainer, threading rules with perform blocks, NSFetchedResultsController for table views, and batch operations that run at SQL level. It includes iOS 17+ features like staged migrations and composite attributes, plus persistent history tracking for multi-target sync. The concurrency section is solid on the "never pass NSManagedObject across threads" rule and shows how to use objectID with Swift concurrency. If you're maintaining a Core Data codebase or need features SwiftData doesn't expose yet, this has the patterns you actually use in production, not just CRUD basics.
Install to Claude Code
npx -y skills add dpearson2699/swift-ios-skills --skill core-data --agent claude-codeInstalls into .claude/skills of the current project.
Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →
Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →
Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →
On Capafy, your Skill runs online 24/7 as an agent product, and you get paid every time someone uses it.
Start earning →
Files
SKILL.md
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Featured
Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →On Capafy, your Skill runs online 24/7 as an agent product, and you get paid every time someone uses it.
Start earning →
