Comment by iafan

Some time ago I created a proof-of-concept reverse CAPTCHA[1] that actually presents a challenge that requires LLM assistance to solve, alongside with the instructions. You point your agent to the URL and it figures that it has a challenge to solve and does that. Seems more in spirit of what a CAPTCHA-like test for AI agents should do.

[1] https://github.com/iafan/botcha