"Starting from Kotlin 1.3-RC2, serialization plugin is shipped with the rest of Kotlin compiler dist...

# announcements

[mathew murphy]

"Starting from Kotlin 1.3-RC2, serialization plugin is shipped with the rest of Kotlin compiler distribution, and the IDEA plugin is bundled into the Kotlin plugin." — https://github.com/Kotlin/kotlinx.serialization

[Marc Knaup]

That needs the runtime, not the plugin.