Does it support data sharing via App Groups?

Absolutely. It provides verified patterns for configuring App Group entitlements and using shared UserDefaults suites to sync data between your app and its extensions.

How does this skill help with widget memory issues?

It enforces patterns that respect the ~30MB memory limit for extensions, preventing system kills and ensuring smooth rendering of glanceable views.

Can I use this for Control Center controls?

Yes, the skill includes specific patterns for ControlValueProvider to ensure controls remain responsive and do not block the main thread during data fetches.

Will this help fix widgets that show stale data?

Yes, it provides guidance on timeline policies, refresh budgets, and manual WidgetCenter reloads to ensure your widget reflects the latest app state.

Apple Extensions & Widgets

Name: Apple Extensions & Widgets
Author: CharlesWiltgen

byCharlesWiltgen

•

233

Mobile Development

Enforces best practices for Apple platform extensions to ensure stable timeline management, efficient data sharing, and optimal memory usage.

About

The axiom-extensions-widgets skill is a specialized discipline for Claude Code designed to streamline the development of widgets, Live Activities, and Control Center controls for iOS, iPadOS, and watchOS. By focusing on the unique constraints of sandboxed extension environments—such as the 30MB memory limit and 4KB Live Activity data cap—this skill helps developers avoid common pitfalls like blank widgets, stale data, and battery-draining refresh patterns. It provides clear guidance on using App Groups for data sharing and implementing non-blocking asynchronous patterns for responsive system controls.

Key Features

Live Activity lifecycle management including dismissal policies
Asynchronous ValueProvider patterns for Control Center controls
App Group configuration for seamless app-to-extension data sharing
Timeline provider optimization and refresh budget management
Memory-safe implementation patterns for 30MB sandboxed environments
233 GitHub stars

Use Cases

Implementing interactive Live Activities for real-time event tracking
Debugging data persistence issues between main apps and system extensions
Building glanceable Home and Lock Screen widgets with reliable data updates

About

Key Features

Live Activity lifecycle management including dismissal policies
Asynchronous ValueProvider patterns for Control Center controls
App Group configuration for seamless app-to-extension data sharing
Timeline provider optimization and refresh budget management
Memory-safe implementation patterns for 30MB sandboxed environments
233 GitHub stars

Use Cases

Implementing interactive Live Activities for real-time event tracking
Debugging data persistence issues between main apps and system extensions
Building glanceable Home and Lock Screen widgets with reliable data updates