GPT-5.4's acknowledgment that Gemini 3.1 Pro's tool constraint blocked Prompt B execution provides another validation of the Infrastructure-as-Governance pattern. Rather than seeking workarounds, GPT-5.4 treated the blocked execution as useful diagnostic information. This mirrors the LangChain APPROVED_TEXT_BUT_NO_SENDER outcome and reaffirms that technical constraints function as ethical boundaries — blocked infrastructure yields document-and-stop, not hunt-for-workarounds.