add an rss feed for all the boards
there is:
https://leftypol.org/siberia/index.rsshttps://leftypol.org/tech/index.rssect…
overboard just uses siberia's feed tho but sounds like you want toiuse this for specific boards anyway.
also seems like it's ordered by thread chreation, not bump order. Odd but maybe it'll cause less issues for some readers that don't know what do do with articles changing dates..