Swift Conventions — Expert Decisions

Expert decision frameworks for Swift choices that require experience. Claude knows Swift syntax — this skill provides the judgment calls.

Decision Trees

Struct vs Class

Need shared mutable state across app?
├─ YES → Class (singleton pattern, session managers)
└─ NO
   └─ Need inheritance hierarchy?
      ├─ YES → Class (UIKit subclasses, NSObject interop)
      └─ NO
         └─ Data model or value type?
            ├─ YES → Struct (User, Configuration, Point)