Is the iOS file system unreliable for saving data?

No, the iOS file system is battle-tested. 99% of storage issues stem from incorrect location choices, protection level mismatches, or missing backup exclusions.

How do I fix 'No permission' errors for background tasks?

Files with .complete protection are inaccessible when the device is locked. Change the protection level to .completeUntilFirstUserAuthentication to allow background access.

When should I use the axiom-storage-diag skill?

Use it whenever you encounter 'file not found,' storage full errors, or data persistence issues during xOS app development.

Why do my files disappear after an iOS device restart?

This usually happens when files are stored in the /tmp/ directory, which iOS purges upon reboot. Moving persistent data to Application Support or Documents resolves this.

Why is my app's iCloud backup so large?

Large re-downloadable content in Documents or Application Support often causes bloat. Use isExcludedFromBackup = true for these files or move them to the Caches directory.

Local Storage Diagnostics for iOS

Name: Local Storage Diagnostics for iOS
Author: CharlesWiltgen

byCharlesWiltgen

•

233

•

Mobile Development

Diagnoses and resolves iOS file system issues including data loss, permission errors, and backup bloat through systematic checks.

This skill provides a comprehensive framework for troubleshooting local file storage problems in modern xOS applications. It helps developers identify root causes for disappearing files, 'file not found' errors after app cycles, and unexpected backup sizes by analyzing storage locations, file protection levels, and backup exclusion settings. By following a structured decision tree and diagnostic checklist, it eliminates guesswork and ensures persistent data is stored correctly according to Apple's best practices.

주요 기능

01Systematic file location analysis (tmp vs. Caches vs. Documents)

02File protection level auditing for background task compatibility

03Backup size auditing and exclusion management

04Decision trees for missing and inaccessible file scenarios

05Ready-to-use Swift diagnostic code snippets

06233 GitHub stars

사용 사례

01Debugging why user files disappear after a device restart or app update

02Resolving permission errors when background tasks attempt to access encrypted files

03Reducing app backup size to prevent iCloud storage warnings or App Store rejection

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add charleswiltgen/axiom axiom-storage-diag

For use in Claude.ai and ChatGPT

Download Skill