In the following project: https://github.com/MarcinMoskala/AnkiMarkdown
When I push a package to NPM, it seems empty. No binary code. I do export a single class: https://github.com/MarcinMoskala/AnkiMarkdown/blob/master/src/jsMain/kotlin/AnkiConnectorJs.kt
In the build/packages/js I have all the files I need, they are just not included in the final package.