Creating a new plugin?

Is there any documentation/tools that help me to create a new plugin for Planet Press?
What tech stack can be used to achieve this?

See the first entry in

Yay. That workes fine. I have my .ppk plugin, I know I can import that plugin in Workflow.
Can I copy such .ppk file somewhere that Workflow will find it automatically and it will use it?

The reason for asking is that I’d like to automate my plugins install/update.

There is no way to automate this, it must be done manually, and the service must be restarted so that the new plugin can be used in Production.