Since February, the Strait of Hormuz — through which a fifth of the world's oil once flowed — has been closed by war, severing one of civilization's most vital arteries. On Tuesday in Tehran, the foreign ministers of Iran and Oman took a careful first step toward restoring passage, agreeing on a phased framework that includes a temporary joint corridor and coordinated mine-clearing operations. What they have built is not yet a solution, but the architecture of one — a reminder that even in the shadow of conflict, diplomacy finds its footing in small, deliberate agreements. Whether that archite