Does this only work in Claude Code?

The most common objection to the Lucy Syndrome framework is that it's a Claude Code trick. It isn't. OpenAI shipped a native hook API for Codex, and the same functional scar now fires unchanged in both runtimes with identical deny semantics — the difference quarantined in a thin adapter. That is the empirical test of invariant I4: enforcement that runs outside the model's trust boundary belongs to…