Who has the US been negotiating with?

Pakistan has been acting as a mediator in the US-Israeli conflict with Iran. Trump has named the Prime Minister of Pakistan Shehbaz Sharif as one of the people he has held conversations with that have led to this conditional agreement for a ceasefire. The country's Field Marshal Asim Munir is also named in his Truth Social post. They "requested that I hold off the destructive force being sent tonight to Iran", Trump writes.