What still needs to be negotiated in US-Iran ‘peace deal’?

The tentative US-Iran agreement to halt hostilities and reopen the Strait of Hormuz marks a potential inflection point in Middle Eastern security, but it is far from a definitive peace. The broader significance lies in whether this framework can translate into durable de-escalation or merely freeze tensions in place—something that has eluded negotiators before. If sustained, the deal could ease oil markets rattled by regional conflict while reducing the risk of direct US-Iran clashes, which have flared repeatedly since 2019. Yet the absence of public details suggests the hardest work remains: translating a ceasefire into verifiable commitments on proxies, nuclear constraints, and sanctions relief. The diplomatic backdrop is fraught. The US and Iran severed ties in 1979 and have since waged a shadow war through regional militias, cyberattacks, and targeted strikes. The 2015 nuclear accord briefly offered a path to détente, but Trump’s withdrawal in 2018 reignited hostilities, culminating in tit-for-tat attacks and the 2020 assassination of Qassem Soleimani. Meanwhile, Iran’s nuclear program has advanced, with uranium enrichment now far beyond the limits of the original deal. Any peace accord must therefore address not just military flare-ups but also Iran’s atomic ambitions—raising the question of whether Washington and Tehran can agree on a framework that balances sanctions relief with nuclear oversight. Open questions abound: Will the accord include mechanisms to curb proxy conflicts in Yemen, Syria, and Iraq, or merely pause them? Can Iran’s Revolutionary Guard be brought into compliance without empowering hardliners who benefit from regional instability? And crucially, will the US Congress or Iran’s Supreme Leader allow a deal to proceed if it appears to concede too much? The answers will shape whether this is a temporary truce or the foundation of a new regional order. For now, the deal’s survival hinges on trust that neither side is exploiting the pause to regroup. If it holds, it could signal a shift toward diplomacy over confrontation—but if it collapses, the cycle of escalation may resume with even higher stakes.