The person tagged the bot in a reply. The post they tagged it in says:
@buildthis.bisks.net can you build a trigram account guesser game as described?
The thread it's replying to, oldest first (this is the context "this" refers to):
@norvid-studies.bsky.social: guess the account!
@bisks.net: wow guess the poster from a set of trigrams would be a decent lil minigame
@bisks.net: or should I say… minogame
@norvid-studies.bsky.social: trigramguessr
@norvid-studies.bsky.social: 🤔 trigruessr
mutual dispatched built