NEW YORK, Sept. 25 -- Three hours into a meeting mediated by Qatar, Pakistan, and Egypt in a secured room at the United Nations, Iranian Foreign Minister Abbas Araghchi slid a folder across the table to Steve Witkoff. Inside was what Tehran had never formally produced before in 207 days of conflict: a written roadmap.

The document, confirmed by Iranian and Qatari officials on Wednesday, proposes a 60-day region-wide ceasefire beginning within ten days of US acceptance, a phased plan to reopen the Strait of Hormuz, blockaded by Iran since July, and a structured timetable for broader negotiations over the security guarantees at the root of the conflict. Washington's envoys, Witkoff and Jared Kushner, took the document without committing to...