The AniList api only lists a release time for the first episode of a batch. So, for something like this series, episode 1 would have a release time listed (and get picked up by the bot), but episodes 2+ just don’t have any airing time and are therefore not picked up by the bot.

I have done some quick searching around and found some other apis that I might play around with (Jikan which queries MAL, and AnimeSchedule.net has an api). I think the ideal scenario would be if a batch release would list all the episodes with the same airing time, and then I could program logic on my end to batch the episodes together into one post (the subreddit makes a series of individual posts, but I don’t think we have enough activity to support a deluge of posts like that).

As for nyaa, it is a popular public anime torrent tracker where pretty much any episode that airs gets posted quite soon. So, the main way that holo keeps track of what episodes have aired is that it parses the recent listings on nyaa to see what new torrents have been added.