Hi, I’ve created simple project based on Kotlin + JSF(Bootsfaces) + CDI(OWB) to check how HotswapAgent is working with Kotlin. Since Kotlin plugin doesn’t support deployment of modified class, the HotswapAgent with autoHotswap=true is adequate workaround with advanced class redefinition support as a pretty bonus. Detailed description is in project README GitHub - skybber/kotlin-bootsfaces-cdi: Using Kotlin+bootsfaces+cdi with HotswapAgent