How to create a new plugin

Hi all,
I was trying to create a new plugin.
Reading documentation I’ve found

"To create a plugin simply copy the plugins/test plugin into a new directory (for example, plugins/myplugin ), then modify manifest.json , and issue a ./ restart "

But no changes I see. Is there a guide, or some indications in order to create a new plugin and make tests on it?
Thanks a lot and sorry for dummy question.


You may have to run ./ start --dev. I may be wrong but its worth a try.