My bookmark feeds don’t have the titles of the bookmarks. Nor link to them. Ones < 280 chars don’t have titles.
The RSS templates are not in my theme but in WordPress in wp-includes. I added only one of my own for microcasts and it goes in my theme folder. It is added as a custom feed.
I don’t think that the indieweb themes do anything with the RSS. It sounds like you are looking for daring fireball type titles/links? I think there was a plugin for that.
BTW I didn’t, yet, get a mention from your post?