gamekit SKILL.md skillA
gamekit from jordancoin/ios-skills-collection is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jordancoin/ios-skills-collection/gamekit@git:20260329.893209fPins git:20260329.893209f in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jordancoin/ios-skills-collection
- Path
skills/dpearson2699--gamekit/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260329.893209f, committed Mar 29, 2026
- Size
- 15,350 bytes
- Repository stars
- 6
- License
- a license file GitHub does not identify
Integrate Game Center features using GameKit. Use when authenticating players with GKLocalPlayer, submitting scores to leaderboards, unlocking achievements, implementing real-time or turn-based multiplayer matchmaking, showing the Game Center access point or dashboard, or adding challenges and friend invitations to iOS games.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# GameKit
Integrate Game Center features into iOS 26+ games using GameKit and Swift 6.3.
Provides player authentication, leaderboards, achievements, multiplayer
matchmaking, access point, dashboard, challenges, and saved games.
## Contents
- [Authentication](#authentication)
- [Access Point](#access-point)
- [Dashboard](#dashboard)
- [Leaderboards](#leaderboards)
- [Achievements](#achievements)
- [Real-Time Multiplayer](#real-time-multiplayer)
- [Turn-Based Multiplayer](#turn-based-multiplayer)
- [Common Mistakes](#common-mistakes)
- [Review Checklist](#review-checklist)
- [References](#references)
## Authentication
All GameKit features require the local player to authenticate first. Set the
`authenticateHandler` on `GKLocalPlayer.local` early in the app lifecycle.
GameKit calls the handler multiple times during initialization.
```swift
import GameKit
func authenticatePlayer() {
GKLocalPlayer.local.authenticateHandler = { viewController, error in
if let viewController {
// Present so the player can sign in or create an account.
present(viewController, animated: true)
return
}
if let error {
…Read the whole file at its exact version.
How to install
mdr add jordancoin/ios-skills-collection/gamekit@sha256:c9d01c1657cb2ebdThe line at the top of this page pins the label git:20260329.893209f, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_nfktpbpfraeszois)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Mar 29, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (15350 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
jordancoin/ios-skills-collection · 6 stars · license a license file GitHub does not identify · pushed 2026-09-10 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_nfktpbpfraeszois GET https://markdownregistry.com/api/v1/resolve?ref=jordancoin/ios-skills-collection/gamekit GET https://markdownregistry.com/api/v1/blob/c9d01c1657cb2ebd6f593308491c50b5ee60fa9021e3405f38424b559aeeb588
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.