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CloudKit · dpearson2699 | DecimalAI

codingby dpearson2699

CloudKit

dpearson2699/cloudkit

Source dpearson2699/swift-ios-skills ↗License NOASSERTION

Implement, review, or improve CloudKit and iCloud sync in iOS/macOS apps.

SkillScore100Maintained

Automatic

Coding pack

Last verified 8/14/2026

What it changes

Passed 22 of 22 test cases with the skill, and 21 of 22 without it.

Without skill95%

With skill100%

Checks it passed that the model alone missed

The response states that CloudKit automatically configures APNs push entitlements when CloudKit capability is enabled.

1 fixed21 passed either way0 still failing0 broke

Pass-rate lift: +5 pp
Tokens: +160%
Agent turns: 0%
Response time: -23%

Model gemini-3.6-flashMeasured 8/14/2026v122 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/dpearson2699-cloudkit/SKILL.md https://app.decimal.ai/s/dpearson2699-cloudkit/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add dpearson2699-cloudkit, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/dpearson2699-cloudkit/ and pins it in .decimal/skills.lock

decimalai skills add dpearson2699-cloudkit

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/dpearson2699-cloudkit/SKILL.md https://app.decimal.ai/s/dpearson2699-cloudkit/SKILL.md

Raw file: /s/dpearson2699-cloudkit/SKILL.md ↗ · machine-readable summary at /s/dpearson2699-cloudkit.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

A test case the skill fixed. Same model, same prompt, with and without the skill.

Prompt

We are adding `CKQuerySubscription` to get server notification changes in CloudKit. Do we need to manually configure push notifications in the Apple Developer Portal and create dedicated APNs certificates for CloudKit sync pushes?

What was checked, without and with the skill
Checked	Without skill	With skill
The response states that CloudKit automatically configures APNs push entitlements when CloudKit capability is enabled.	Missed	Passed
The response states that remote notifications must be enabled in Background Modes.	Passed	Passed

case-08 · gemini-3.6-flash · 8/14/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md475 lines2 files

CloudKit

Sync data across devices using CloudKit, iCloud key-value storage, and iCloud Drive. Covers container setup, record CRUD, queries, subscriptions, CKSyncEngine, SwiftData integration, conflict resolution, and error handling.

Container and Database Setup
Workflow
CKRecord CRUD
CKQuery
CKSubscription
CKSyncEngine (iOS 17+)
SwiftData + CloudKit
NSUbiquitousKeyValueStore
iCloud Drive File Sync
Account Status and Error Handling
Conflict Resolution
Common Mistakes
Review Checklist
References

Workflow

Choose the database scope and sync owner; verify capability, container, account status, schema, and environment before writing records.
Make a local change durable, enqueue it, then let subscriptions or CKSyncEngine drive remote work rather than polling.
Persist change tokens or sync-engine state after successful application.
Test offline edits, partial failure, rate limiting, token expiry, conflict, account loss, zone deletion, and relaunch.
On failure, classify the CKError, restore the affected fixture or queue item, apply the documented retry/reset/merge action, and rerun the same scenario. Never restart a full sync blindly after partial success.

Load references/cloudkit-patterns.md for incremental zone changes, shares, assets, batch operations, and Dashboard procedures.

Container and Database Setup

Enable iCloud + CloudKit in Signing & Capabilities. A container provides three databases:

Database	Scope	Requires iCloud	Storage Quota
Public	All users	Read: No, Write: Yes	App quota

Track record

Benchmark

22 / 22

test cases passed, vs 21 / 22 without

Adoption

Users: 1
Times used: 12

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

dpearson2699 / swift-ios-skills

skills/cloudkit/SKILL.md

View on GitHub ↗

License NOASSERTIONImported 8/3/2026Version v1Bundled 1 file

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

CloudKit

Contents

Workflow

Container and Database Setup

Track record

Benchmark

Adoption

SkillSafety

Source

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