US is in no position to spell out anything. They are stuck in the quicksand of Afghanistan and there is no honourable way out for them except for Pakistans help. They have tried everything they could in the last decade and a half and they are still standing at square one.
You don't dictate your terms for someone to throw you a lifeline. We have not gained anything from our relationship with America ever. These back-stabber ditched us in 1971 war despite us being part of CETO and CENTO. They ditched us after withdrawal of Soviet troops from Afghanistan and they have already abandoned us despite our huge sacrifices and continuous support to this day. They have lied about the reimbursement of CSF as aid and have stopped that altogether.
They stopped deliveries of fully paid F-16's once, then again a few years back and now the Zulu's. They have proved themselves to be very dependable liars and back-stabbers. They can't keep their commitments and promises. They only need us to get out of Afghanistan. Once they are out of this mess they will definitely ditch us once again.
It is in the world's interest to keep them occupied in Afghanistan, otherwise, they will start a new war somewhere else within one year of getting out of Afghanistan.
They shove their terms of engagement up where their brains have descended. We will work for our interest.