kotlin-patterns

Idiomatic Kotlin patterns and best practices for building robust, efficient, and maintainable applications. This skill enforces idiomatic Kotlin conventions across seven key areas: null safety using the type system and safe-call operators, immutability via val and copy() on data classes, sealed classes and interfaces for exhaustive type hierarchies, structured concurrency with coroutines and Flow , extension functions for adding behaviour without inheritance, type-safe DSL builders using @DslMarker and lambda receivers, and Gradle Kotlin DSL for build configuration. Null safety with Elvis operator: Sealed class for exhaustive results: Structured concurrency with async/await: Kotlin's type system distinguishes nullable and non-nullable types. Leverage it fully. Prefer val over var , immutable collections over mutable ones. Use expression bodies for concise, readable functions. Use data classes for types that primarily hold data. Remember : Kotlin code should be concise but readable.