Core Data is a production-ready Claude Code skill (quality score 70/100) in the threat-hunting sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/core-data/ and loads when your prompt matches the skill's trigger.
When to invoke it: Use when working with NSManagedObject subclasses, NSFetchedResultsController for list-driven UI, NSBatchInsertRequest / NSBatchDeleteRequest / NSBatchUpdateRequest for bulk operations, NSPersistentHistoryChangeRequest for persistent history tracking and multi-target sync, NSStagedMigrationManager for staged schema migrations (iOS 17+), NSCompositeAttributeDescription for composite attributes (iOS 17+), or when integrating Core Data threading with Swift Concurrency. For Core Data + SwiftData coexistence or migration, see the swiftdata skill instead.
The Core Data skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It is part of the open ClaudSkills registry, a community-curated catalog of 15,000+ capabilities you can install for Claude Code — the Claude CLI agent.
mkdir -p ~/.claude/skills/core-data curl -L https://claudskills.com/skills/core-data/SKILL.md \ -o ~/.claude/skills/core-data/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/core-data/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/core-data/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\core-data\SKILL.md on Windows. See the full install guide for step-by-step instructions.
The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.
Browse all Security skills in the ClaudSkills registry, or explore these top-rated picks from the same category:
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