Activitykit

Handles the full ActivityKit stack for building Live Activities and Dynamic Island experiences in iOS apps. You get concrete patterns for defining ActivityAttributes with static and dynamic state, managing the activity lifecycle from start to end, laying out Lock Screen widgets, and configuring all three Dynamic Island presentations (compact, minimal, expanded). Also covers push-to-update integration with APNs token handling and payload formats. The code targets iOS 26+ with Swift 6.3 but stays backward compatible to iOS 16.1. Most useful when you're building real-time status updates like delivery tracking or workout timers and need to avoid the common mistakes around stale dates, dismissal policies, and state serialization size.

skills.sh installs: 3.5K
GitHub stars: 1.3K
last updated: Aug 21, 2026

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Install

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

Installs into .claude/skills of the current project.

Files

ActivityKit

ActivityKit owns real-time, glanceable Live Activities displayed on the Lock Screen and Dynamic Island. Ordinary timeline widgets belong in widgetkit, and generic APNs setup belongs in push-notifications; ActivityKit owns the Live Activity lifecycle and payload contract. aps.content-state must decode into the exact ActivityAttributes.ContentState shape, including any coordinated custom date/range encoding. Modern ActivityContent lifecycle examples require iOS 16.2+ unless noted.

See references/activitykit-patterns.md for complete code patterns including push payload formats, concurrent activities, state observation, and testing.