I don’t know how to create a robot-free Internet without accidentally furthering surveillance of humans. Any technique I can think of that would reliably prove I’m not a bot also seems like a technique that would make it easier for commercial or government tracking of me.

It's not hard to make sites completely antagonistic to LLMs / agentic AI. Even just having the basic Cloudflare bot check filters out a lot by itself.

This is more a case of GitHub as an organization actively embracing having agentic AI rummaging about.