@nwillc regarding dokka configurations, would this:

val javadocJar by tasks.registering(Jar::class) {
    val dokka by tasks.getting(DokkaTask::class) {
        outputFormat = "html"
        outputDirectory = "$buildDir/dokka"
    }
    dependsOn(dokka)
    archiveClassifier.set("javadoc")
    from(dokka)
}

be also correct?

Thanks for your time.