Kotlin Patterns

Day-to-day idiomatic Kotlin for JVM and Android code. Use android-testing for test infrastructure and mobile-technique for offensive audit of shipped APKs.

When to activate

• Writing or refactoring .kt modules, libraries, or Android features
• Porting Java code to Kotlin without carrying over Java idioms
• Reviewing PRs for null-safety, coroutine misuse, or leaky lifecycle scopes
• Designing sealed state hierarchies, Flow pipelines, or repository APIs
• Deciding between data class, value class, object, and sealed class

Core rules (high signal)