OpenAI has implemented unusual guardrails in its Codex tool to prevent discussions about goblins, gremlins, racoons and other mythical creatures unless relevant.

Never talk about goblins, gremlins, raccoons, trolls, ogres, pigeons, or other animals or creatures unless it is absolutely and unambiguously relevant,” reads OpenAI’s coding agent instructions.

OpenAI included a line in Codex's instructions restricting references to goblins, gremlins, trolls, and ogres. It also ...