Is anyone aware of an existing project that can do something like this:

• Access an RSS feed.
• Parse the contents of the items in the feed, and fetch linked images.
• Take the new feed elements and add them to previously fetched elements.
• Store all of the content in a merged RSS/XML file, or something like a SQLite DB.

Context: I'd like to archive Mastodon posts of an account automatically. I'd prefer it to be a script/binary I could run on Linux as I'd likely throw it in a GitHub action and save the resulting output in the git repo.

I could probably whip something together but I'm lazy and I'd prefer to use something that already exists.