Feedgen: A "What You Missed" Feed and a Scoped Trending Topics

[d3ol-dev]

Is your feature request related to a problem? Please describe.

1. When users don't use the Bluesky app for some time, posts from feeds and/or accounts they follow get buried as new posts get created. The only option a user would have to see all the posts they have missed would be to:

   1. Go to user profile or feed
   2. Scroll to the last known post (this relies on the user's memory)
      This method is quite tedious, and can lead to users being out of the loop with no efficient way of catching themselves up

2. Trending Topics is a feature that shows the most popular topics being discussed across the entire bsky network. Having a scoped-down version of this feature would allow users of feeds to see what topics are popular in a specific feed, rather than what's popular on the whole of bsky.

Describe the solution you'd like

Most likely, the first issue would have to be solved by a custom atproto client. Implementing a viewedAt field in the protocol could add unnecessary complexity.

The second issue would probably require a combination of two solutions. 1) extending feed functionality to monitor the most popular topics during a given timeframe 2) an atproto client to display the topics in the feed (the most popular app client, Bluesky, currently doesn't support this feature.

Additional context

A screenshot of the Trending Topics section in Bluesky on a desktop.

A screenshot of the Trending Topics section in Bluesky on a mobile device.