To avoid making too many new threads, I am going to just put more RSS/feed comments here as they come up. Reading around the web about this a bit, I didn’t realize that RSS compatibility is so complicated.
Currently all Observable RSS feed items just contain:
<title> the title
<link> a URL
<description> clickable thumbnail, no text
<guid> the same URL
<pubDate> a timestamp
These should probably also at least include the author, especially feeds involving multiple authors like the firehose of recent notebooks or the feeds for collections.
It would also be nice to have last modification date (I am not sure but this might even cause previously visited rss entries to show up as unread in feed readers when they are updated? a possibly desirable behavior), a description/summary of a couple sentences, and ideally a longer html content including the first few paragraphs and images of the notebook. It seems like the thumbnail image can be in a separate “image” tag instead of in the description.
As a supplement to an RSS feed, it might be nice to also add a jsonfeed version, which is a bit easier to consume, and probably also easier to produce, https://jsonfeed.org/version/1.1 – apparently in jsonfeed the “author” is a json object consisting of name, url, and “avatar” image url.