Shareplay Activities

This covers building real-time shared experiences on Apple platforms using GroupActivities and SharePlay. You'll use it when you want to sync media playback across FaceTime calls, build collaborative features like shared drawing canvases, or keep game state synchronized between participants. The skill walks through the full setup: defining activities with proper metadata, managing session lifecycle and participant changes, sending reliable or unreliable messages for state sync, and wiring up AVPlayer's built-in playback coordinator. It targets Swift 6.3 and iOS 26+, includes entitlement configuration, and covers both in-call activation and starting SharePlay from your app when no conversation is active. The reliable versus unreliable messenger distinction is especially useful for balancing responsiveness with consistency.

skills.sh installs: 3.7K
GitHub stars: 1.3K
last updated: Aug 21, 2026

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Install

$ npx -y skills add dpearson2699/swift-ios-skills --skill shareplay-activities --agent claude-code

Installs into .claude/skills of the current project.

Files

GroupActivities / SharePlay

Build shared real-time experiences using the GroupActivities framework. SharePlay connects people over FaceTime, Messages, AirDrop, and nearby visionOS sharing, synchronizing media playback, app state, or custom data.

Setup
Defining a GroupActivity
Session Lifecycle
Sending and Receiving Messages
Coordinated Media Playback
Starting SharePlay from Your App
GroupSessionJournal: File Transfer
Common Mistakes
Review Checklist
References

Setup

Capability

Add the Group Activities capability to the app target in Xcode. Xcode adds the required entitlement and updates the provisioning profile:

<key>com.apple.developer.group-session</key>
<true/>

Configure this only for app targets. Group Activities are not available in widgets, extensions, or App Clips.

Checking Eligibility

import GroupActivities

SKILL.md on GitHub

Details

Repository: github.com/dpearson2699/swift-ios-skills
Categories: DevOps & CI/CD, Mobile Development, Game Development
First seen: Apr 16, 2026