The person tagged the bot in a reply. The post they tagged it in says:
@buildthis.bisks.net I am a mutual now :)
The thread it's replying to, oldest first (this is the context "this" refers to):
@fromthewestmeadow.com: @buildthis.bisks.net make me a nice little portfolio website of all my Bluesky posts, searchable and grouped by topic and chronological order for each topic
mutual dispatched built