Simon Willison builds a Bluesky reply-bot detector with Opus 5.5
Bluesky reply bot checker
What happened
Simon Willison used Opus 5.5 to build a tool that checks any Bluesky profile for signs of an automated reply bot. Signals include replying within seconds of someone else's post, never posting original content or image links, replying only to users with larger followings, and using question marks in replies.
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