Kotlin Multiplatform: Platform Abstraction Decisions

Expert guidance for KMP architecture in Amethyst - deciding what to share vs keep platform-specific.

When to Use This Skill

Making platform abstraction decisions:

• "Should I create expect/actual or keep Android-only?"
• "Can I share this ViewModel logic?"
• "Where does this crypto/JSON/network implementation belong?"
• "This uses Android Context - can it be abstracted?"
• "Is this code in the wrong module?"
• Preparing for iOS/web/wasm targets
• Detecting incorrect placements

Abstraction Decision Tree

Central question: "Should this code be reused across platforms?"