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Generate CloudKit sync infrastructure using CKSyncEngine with conflict resolution, sharing, and account monitoring.
Passed 18 of 22 test cases with the skill, and 14 of 22 without it.
and 1 more in the full report
4 fixed14 passed either way4 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.
If an iOS project has a 'Sources/' directory in its root structure, where should generated CloudKit sync files be placed?
| Checked | Without skill | With skill |
|---|---|---|
| Places generated files under Sources/CloudSync/. | Missed | Passed |
The instructions your model reads when the skill loads.
Generate production-ready CloudKit sync infrastructure using CKSyncEngine (iOS 17+ / macOS 14+), the modern replacement for manual CKOperation chains.
Use this skill when the user:
Before generating, ALWAYS check:
# Check deployment target (CKSyncEngine requires iOS 17+ / macOS 14+)
grep -r "platform" Package.swift 2>/dev/null || true
grep -r "IPHONEOS_DEPLOYMENT_TARGET\|MACOSX_DEPLOYMENT_TARGET" --include="*.pbxproj" | head -3
# Find existing CloudKit implementations
rg -l "CKSyncEngine\|CKContainer\|CKRecord\|CKOperation" --type swift | head -10
# Check for existing entitlements
find . -name "*.entitlements" -exec cat {} \; 2>/dev/null | grep -i "icloud"
# Check existing persistence layer
rg -l "@Model\|NSManagedObject\|PersistentModel" --type swift | head -5
# Check for existing sync infrastructure
rg "CKSyncEngineDelegate\|CKSubscription\|CKFetchRecordZoneChanges" --type swift | head -5
CKSyncEngine requires:
test cases passed, vs 14 / 22 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.