Micronaut Framework 5.0, to be released in Q2 2026, supports Kotlin 2.3. Kotlin 2.3. main highlights are:
- Language: More stable and default features, unused return value checker, explicit backing fields, and changes to context-sensitive resolution.
- Kotlin/JVM: Support for Java 25.
- Kotlin/Native: Improved interop through Swift export, faster build time for release tasks, C and Objective-C library import in Beta.
- Kotlin/Wasm: Fully qualified names and new exception handling proposal enabled by default, as well as new compact storage for Latin-1 characters.
- Kotlin/JS: New experimental suspend function export, LongArray representation, unified companion object access, and more.
- Gradle: Compatibility with Gradle 9.0 and a new API for registering generated sources.
- Compose compiler: Stack traces for minified Android applications.
- Standard library: Stable time tracking functionality and improved UUID generation and parsing.
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