OpenAI's rival to Claude Code has a very strict command line for AI agents: Never talk about

OpenAI's AI Agent, Codex, has been restricted from mentioning mythical creatures like goblins due to an unintended training ...

OpenAI Codex system prompt includes explicit directive to “never talk about goblins”

The system prompt for OpenAI’s Codex CLI contains a perplexing and repeated warning for the most recent GPT model to “never ...