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@arb8020 thread (2): @arb8020: gpt-5.5 prompt for codex seems to have a duplica…
@arb8020threadx
TL;DR. OpenAI's Codex GPT-5.5 system prompt accidentally duplicates a bizarre line forbidding the model from discussing goblins, gremlins, raccoons, trolls, ogres, and pigeons.
Takeaways
- The exact banned-creature list lives in
codex-rs/models-manager/models.jsonon the public openai/codex repo — and the instruction appears twice. - Hints that even frontier lab system prompts contain quirky, hand-tuned guardrails (and copy-paste bugs) that leak into open repos.
- Author's follow-up: "let my boy talk about creatures."