Kotlin 2.4.0

Kotlin 2.4.0 graduates context parameters to stable, adds explicit backing fields, enables Swift packages as direct Kotlin/Native dependencies, targets Java 26, and enables incremental compilation for Wasm by default.

• Context parameters stable — parameters resolved from the call site implicitly rather than passed explicitly; useful for dependency-injection patterns in Compose UI and scope threading through layered architectures
• Explicit backing fields — property accessors now reference the backing field directly via field, removing the _property convention; @all meta-target simplifies annotation application across all target sites
• Swift packages as Kotlin/Native dependencies — KMP projects targeting iOS declare Swift packages directly; the compiler generates interop bindings automatically, no CocoaPod wrappers or .def files needed
• Java 26 support — Kotlin/JVM compiler targets Java 26 bytecode, unlocking the latest JVM optimisations from Kotlin code
• Incremental Wasm compilation — enabled by default, cutting rebuild times for Kotlin/Wasm targets
• Compiler plugin symbol-resolution API — plugin authors gain a new API that reduces workarounds; serialization plugin now supports @Serializable on companion objects

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