Bluesky reply bot checker

Simon Willison released the Bluesky reply bot checker, which identifies suspected automated reply-bot accounts by analyzing behavioral signals in recent posts such as typing speed, posting times and interaction patterns. The tool shows every measurement and rule and lets you view the example replies that triggered the most signals; the author built it with Opus 5.5 vibe coding and notes Bluesky still has a free, usable API that makes this kind of investigation easy.