"Organizations protect explanations that make them feel competent.
Pressure does something predictable: it narrows attention. In a system boundary decision that affects two teams, that narrowing turns into a demand for certainty you cannot honestly provide.
When the decision stays implicit, the system still commits—by drift, escalation, or whoever speaks last. You see it in a shortcut that becomes the new operating mode, where the first clear call happens after the cost has already been paid. Write it for the person who inherits it later, because they will not have today’s context or today’s goodwill.
Write the hidden assumption as a sentence, then choose the signal that would break it. That is how you turn stress into clarity instead of theater. Keep it short enough to remember under stress.