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Agent skill

Cloudkit Sync

by gustavscirulis in gustavscirulis/snapgrid

Generate CloudKit sync infrastructure using CKSyncEngine with conflict resolution, sharing, and account monitoring.

Custom licenceAuto-check: notesMobile

Install Cloudkit Sync

skills CLI
$ npx skills add gustavscirulis/snapgrid --skill cloudkit-sync -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install gustavscirulis/snapgrid cloudkit-sync --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/gustavscirulis/snapgrid.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/skills/generators/cloudkit-sync .claude/skills/cloudkit-sync && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
cloudkit-sync
GitHub stars
117
Used in
1 other repo
Token cost
~2.8k tokens
SKILL.md length
772 words
Files
2
Skills in repo
120
Repo updated
First seen
Licence
Custom licence

At a glance

Generate CloudKit sync infrastructure using CKSyncEngine with conflict resolution, sharing, and account monitoring.

  • Works in 8 steps: Project Context Detection → Compatibility Verification → Conflict Detection → …
  • Adding iCloud sync to an iOS/macOS app
  • SKILL.md covers When This Skill Activates, Pre-Generation Checks, Configuration Questions and Generation Process, plus 5 more sections
  • Calls rg; reaches apple.com

What it does

Cloudkit Sync is an agent skill from gustavscirulis/snapgrid. Generate CloudKit sync infrastructure using CKSyncEngine with conflict resolution, sharing, and account monitoring. Use when adding iCloud sync to an iOS/macOS app.

Its SKILL.md is about 2.8k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `templates.md`).

It sits in Mobile. It works with iOS and macOS. The repository describes itself as: SnapGrid is an open-source Mac app for collecting, organizing, and analyzing UI screenshots. It uses AI to automatically detect UI components and patterns, making it a powerful…

When your agent uses it

  • Adding iCloud sync to an iOS/macOS app

Example prompts

  • “/cloudkit-sync”

Requirements

  • Pre-approved tools (allowed-tools): Read, Write, Edit, Glob, Grep, Bash, AskUserQuestion

Workflow steps

8 steps, taken from the step headings in SKILL.md.

  1. Project Context Detection
  2. Compatibility Verification
  3. Conflict Detection
  4. Read Templates
  5. Create Core Files
  6. Determine File Location
  7. Customize for Project
  8. Entitlements Setup

What it can do on your machine

Read from SKILL.md and the folder at commit eb7eaf4. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Write
    • Edit
    • Glob
    • Grep
    • Bash
    • AskUserQuestion

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • rg

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • apple.com

    Also links to:

    • developer.apple.com
    • icloud.developer.apple.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Cloudkit Sync loads about 2.8k tokens when it runs. Until then it costs about 45 tokens; SKILL.md has 772 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~45
When it runs · the whole SKILL.md, loaded when a task matches
~2.8k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
    allowed-tools: Read, Write, Edit, Glob, Grep, Bash, AskUserQuestion

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 772 words (~2,830 tokens).

“Generate production-ready CloudKit sync infrastructure using CKSyncEngine (iOS 17+ / macOS 14+), the modern replacement for manual CKOperation chains.”

— opening of SKILL.md by gustavscirulis, Custom licence
name
cloudkit-sync
allowed-tools
Read, Write, Edit, Glob, Grep, Bash, AskUserQuestion

Read the full SKILL.md on GitHub

Files

SKILL.md and 1 other file in .claude/skills/skills/generators/cloudkit-sync of gustavscirulis/snapgrid.

  • SKILL.md
  • templates.md

Open the folder on GitHubat commit eb7eaf4

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in gustavscirulis/snapgrid, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Cloudkit Sync next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Cloudkit Sync compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Cloudkit Sync this skillgustavscirulis/snapgrid1171 repos~2.8kAutomated safety check: NotesCustom licence
Orca iOS Simulator Controlstablyai/orca87k1 repos~584Automated safety check: PassApache-2.0
Swiftui Expert SkillAvdLee/SwiftUI-Agent-Skill3.7k—~2.9kAutomated safety check: PassMIT
Swiftui Expert SkillEslzzyl/Pixiv-SwiftUI1115 repos~3.1kAutomated safety check: PassAGPL-3.0
Apple Crash Log .NET Symbolicationdotnet/skills5.6k1 repos~2.4kAutomated safety check: PassMIT
App Store Screenshots GeneratorParthJadhav/app-store-screenshots7.2k—~14kAutomated safety check: PassMIT

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All 120 skills in this repo

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  • Market Research

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    117 GitHub starsUsed in 2 repos~3.1k tokens
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  • Account Deletion

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    Generates an Apple-compliant account deletion flow with multi-step confirmation UI, optional data export, configurable grace period, Keychain cleanup, and server-side deletion request.

    117 GitHub starsUsed in 1 repo~2.5k tokens
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  • Alarmkit

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Works with

Categories

Questions about Cloudkit Sync

What does Cloudkit Sync do?

Generate CloudKit sync infrastructure using CKSyncEngine with conflict resolution, sharing, and account monitoring. Cloudkit Sync is an agent skill from gustavscirulis/snapgrid. Generate CloudKit sync infrastructure using CKSyncEngine with conflict resolution, sharing, and account monitoring.

When should I use Cloudkit Sync?

Cloudkit Sync fits situations like: adding iCloud sync to an iOS/macOS app.

How do I install Cloudkit Sync in Claude Code?

Run `npx skills add gustavscirulis/snapgrid --skill cloudkit-sync -a claude-code`. Or copy the skill folder (.claude/skills/skills/generators/cloudkit-sync in gustavscirulis/snapgrid) into .claude/skills/cloudkit-sync in your project. Claude Code loads it when a task matches its description.

How do I install Cloudkit Sync in Codex?

Run `npx skills add gustavscirulis/snapgrid --skill cloudkit-sync -a codex`. Or copy the skill folder (.claude/skills/skills/generators/cloudkit-sync in gustavscirulis/snapgrid) into .agents/skills/cloudkit-sync in your project. Codex loads it when a task matches its description.

Can I use Cloudkit Sync in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add gustavscirulis/snapgrid --skill cloudkit-sync -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/cloudkit-sync, .gemini/skills/cloudkit-sync, .github/skills/cloudkit-sync and .opencode/skills/cloudkit-sync in your project.

What does Cloudkit Sync need to run?

Going by SKILL.md and its folder, Cloudkit Sync needs the command-line tools its instructions call (rg). Its frontmatter pre-approves these tools: Read, Write, Edit, Glob, Grep, Bash, AskUserQuestion.

Does Cloudkit Sync access the network?

SKILL.md names 3 domains. In commands or code: apple.com; the agent is likely to contact it when it follows the instructions. As links in the text: developer.apple.com and icloud.developer.apple.com. This is read from the text; nothing was executed.

Is Cloudkit Sync safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Cloudkit Sync use?

Cloudkit Sync has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Cloudkit Sync use?

About 2.8k tokens (SKILL.md is roughly 11k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Cloudkit Sync?

Skills that share tags, products or a category with Cloudkit Sync: Orca iOS Simulator Control (stablyai/orca, 87k stars), Swiftui Expert Skill (AvdLee/SwiftUI-Agent-Skill, 3.7k stars), Swiftui Expert Skill (Eslzzyl/Pixiv-SwiftUI, 111 stars) and Apple Crash Log .NET Symbolication (dotnet/skills, 5.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Cloudkit Sync?

gustavscirulis (a GitHub user) maintains it in gustavscirulis/snapgrid, which has 117 GitHub stars. The repository holds 120 skills in this directory. The repository was last updated on April 30, 2026.

Source: gustavscirulis/snapgrid on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.