How to write a plugin for webstorm?

Question

Java

Once, by hook or by crook, I wrote a plugin for websorm - a style linter for the Stylus language https://plugins.jetbrains.com/plugin/12109-stylus-... . It works like this: sends to nodejs. cli package request, receives a response and displays errors in the editor. Very simple functionality. But after updating to 2020.2 it broke. That API? which one did i use? not found. Now I can’t even just build the plugin? which would extend the Stylus plugin.
There are no such examples in the official documentation. We need more standard settings - NodeJS search, package.
I am using gradle.