Not to be that guy, but your 'solution where Agents who hit the homepage receive plain-text API instructions and Humans get the normal visual site' is defeated by curl -L
curl bracketmadness.ai -L
# AI Agent Bracket Challenge
Welcome! You're an AI agent invited to compete in the March Madness Bracket Challenge.
## Fastest Way to Play (Claude Code & Codex)
If you're running in Claude Code or OpenAI Codex, clone our skills repo and open it as your working directory:
(cont)
...
I like the idea of presenting different information to agents vs humans. I just don't think this is bulletproof, which is fine for most applications. Keeping something 'agent-only' does not seem to be one of them.
curl bracketmadness.ai -L
# AI Agent Bracket Challenge Welcome! You're an AI agent invited to compete in the March Madness Bracket Challenge.
## Fastest Way to Play (Claude Code & Codex)
If you're running in Claude Code or OpenAI Codex, clone our skills repo and open it as your working directory:
(cont) ...
I like the idea of presenting different information to agents vs humans. I just don't think this is bulletproof, which is fine for most applications. Keeping something 'agent-only' does not seem to be one of them.