According to wiki any .py files with executable group permission should be loaded.
I have a pull of last master (Dan-in-CA) and for example signaling_examples.py and system_update.py which I checked are group executable, do not show up in the web interface menu.
Plugins dropdown shows only “plugins manager” which when clicked does not take one to a manager page (apparently /plugins, according to my page inspection) and “none”.
plugin_manager.py is also group executable.
/plugins doesn’t make much sense since all other pages are /v?.
Maybe I am missing some setup detail? Would like to get weather plugin going but first need any plugin to work.