Does a person on a list notify me when they published something on Habla?
Discussion
It's not the person, it's the client supporting list/feeds that discover the new content ad so alert you.
With custom feeds you can filter which type of content, e.g. see only long format notes.
Feed notifications would be interesting. Maybe an extra `notify` tag which supporting clients can pick up and alert the user to? I actually really like that.
I was thinking of using the usual dot next to the name for a simple and not too intrusive first notice:

Or are you thinking about something more prominent, like a popup/toast?
The dot is an interesting idea, I don't know if I want to load the universe in the background. I was thinking maybe a card in notifications, but your idea is better