SECURITY REVIEW
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Community / AGENT SKILL
cloudkit-code-review
0
Reviews CloudKit code for container setup, record handling, subscriptions, and sharing patterns. Use when reviewing code with import CloudKit, CKContainer, CKRecord, CKShare, or CKSubscription.
Understand the trade-offs.
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The full skill.
Original instructions from the publisher’s SKILL.md
# CloudKit Code Review ## Quick Reference | Issue Type | Reference | |------------|-----------| | CKContainer, databases, zones, entitlements | [references/container-setup.md](references/container-setup.md) | | CKRecord, references, assets, batch operations | [references/records.md](references/records.md) | | CKSubscription, push notifications, silent sync | [references/subscriptions.md](references/subscriptions.md) | | CKShare, participants, permissions, acceptance | [references/sharing.md](references/sharing.md) | ## Review Checklist - [ ] Account status checked before private/shared database operations - [ ] Custom zones used (not default zone) for production data - [ ] All CloudKit errors handled with `retryAfterSeconds` respected - [ ] `serverRecordChanged` conflicts handled with proper merge logic - [ ] `CKErrorPartialFailure` parsed for individual record errors - [ ] Batch operations used (`CKModifyRecordsOperation`) not individual saves - [ ] Large binary data stored as `CKAsset` (records have 1MB limit) - [ ] Record keys type-safe (enums) not string literals - [ ] UI updates dispatched to main thread from callbacks - [ ] `CKAccountChangedNotification` observed for account switches - [ ] Subscriptions have unique IDs to prevent duplicates - [ ] CKShare uses custom zone (sharing requires custom zones) ## When to Load References - Reviewing container/database setup or zones -> container-setup.md - Reviewing record CRUD or relationships -> records.md - Reviewing push notifications or sync triggers -> subscriptions.md - Reviewing sharing or collaboration features -> sharing.md ## Output Format Report issues using: `[FILE:LINE] ISSUE_TITLE` Examples: - `[AppDelegate.swift:24] CKContainer not in custom zone` - `[SyncManager.swift:156] Unhandled CKErrorPartialFailure` - `[DataStore.swift:89] Missing retryAfterSeconds backoff` ## Review Questions 1. What happens when the user is signed out of iCloud? 2. Does error handling respect rate limiting (`retryAfterSeconds`)? 3. Are conflicts resolved or does data get overwritten silently? 4. Is the schema deployed to production before App Store release? 5. Are shared records in custom zones (required for CKShare)?