Mr Ghani said it is still not clear when the period will begin, adding that the Taliban's sincerity in entering the agreement was unproven
The agreement for a seven-day "reduction in violence" announced this week after long negotiations between Washington and the jihadists has raised hopes that a comprehensive peace deal could follow.
The acid test of the Taliban's sincerity will be their willingness to accept elections, Mr Ghani said - something they have always refused to engage in. The US wants to reduce its military presence in Afghanistan, which currently numbers between 12,000 and 13,000, with President Donald Trump keen to make good on a promise to bring troops home after 18 years of war.
He said Afghanistan and the US would be making another announcement in the coming "week to 10 days" in order to "demonstrate mutual confidence and trust between us.""You are going to have to take an existential step forward and test."How will the withdrawal of US troops affect Afghanistan? There have been previous false dawns in Afghanistan, with a deal all but complete in September before President Trump nixed it at the last moment amid continued Taliban violence.