AvdLee/Core-Data-Agent-Skill

What it solves

It provides AI coding tools with expert-level knowledge of Apple's Core Data framework. This prevents AI agents from suggesting outdated or unsafe persistence patterns, helping developers avoid threading errors, performance bottlenecks, and risky schema migrations.

How it works

The project follows the "Agent Skills" open format, providing a structured set of Markdown files (including decision trees and reference guides) that an AI agent can ingest. When an agent is equipped with this skill, it references specific playbooks and guides—such as those for batch operations, CloudKit integration, and concurrency—to provide technically accurate and production-ready Core Data advice.

Who it’s for

• iOS and macOS developers using Core Data for local persistence.
• Teams needing safe defaults and quick triage for persistence issues.
• Developers integrating CloudKit sync or performing complex schema migrations.

Highlights

• Production-Grounded: Based on real-world experience from apps like WeTransfer's Collect and WWDC sessions.
• Modern Standards: Covers recent features like composite attributes and staged migration (iOS 17+).
• Comprehensive Coverage: Includes dedicated guides for thread safety, performance profiling with Instruments, and memory management.
• Tool Agnostic: Compatible with any AI tool supporting the Agent Skills format, including Claude Code, Cursor, and Codex.