Sparkle Auto-Update for macOS Apps This skill adds Sparkle auto-update support to a native macOS app. Sparkle is the standard open-source framework for macOS app updates outside the Mac App Store. Overview The implementation has 4 parts: 1. SPM dependency -- add the Sparkle package to the Xcode project 2. UpdaterManager.swift -- a singleton that wraps 3. Info.plist keys -- and 4. UI integration -- "Check for Updates" button in settings/menu bar Step 1: Add Sparkle via SPM In Xcode: File Add Package Dependencies enter: Use the "Up to Next Major Version" rule with . Add the framework to your ap…