jordancoin/ios-skills-collection · skills/avdlee--core-data-expert/SKILL.md

core-data-expert skillA

core-data-expert is agent-read markdown (skill) from jordancoin/ios-skills-collection: Expert Core Data guidance (iOS/macOS): stack setup, fetch requests & NSFetchedResultsController, saving/merge conflicts, threading & Swift Concurrency, batch operations & persistent history, migrations, performance, and NSPersistentCloudKitContainer/CloudKit sync..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add jordancoin/ios-skills-collection/core-data-expert@git:20260330.1853d9e
Exact content
mdr add jordancoin/ios-skills-collection/core-data-expert@sha256:74cac8c2a86868a3

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_gei4bzsgehyclnnr.svg)](https://markdownregistry.com/a/art_gei4bzsgehyclnnr)

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Versions

versioncommittedcommitsizeaudit
git:20260330.1853d9e latest2026-03-30 1853d9e 4,894 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (4894 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

jordancoin/ios-skills-collection · 5 stars · license NOASSERTION · pushed 2026-09-10 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_gei4bzsgehyclnnr
GET https://markdownregistry.com/api/v1/resolve?ref=jordancoin/ios-skills-collection/core-data-expert
GET https://markdownregistry.com/api/v1/blob/74cac8c2a86868a30d41769529ab45124098d89cebd65c2fa310dd52a5ff1b7e

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.