Looks like the US and Israel as signaling that they are prepared to engage in Syria. The cessation of hostilities was another ruse to permit the "rebels" to regroup and resupply.
Moon of Alabama
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The only reason why they apparently don’t want to make it public is because the international community, as well as American and Russian public will immediately find out who is not abiding by the deal," Putin said in Bishkek, Kyrgyzstan.
"We agreed that al-Nusra Front should be distanced from the opposition and that their location should be disclosed as well as that of the so-called healthy [moderate] forces. What do we see instead? We see no separation of terrorists and healthy forces, but rather attempts by terrorists to regroup," he said.Putin Reveals Why US is Against Making Deal With Russia on Syria Public
"I wish we were honest with each other… And I do not quite understand, why we should conceal any of our agreements. Of course, we will not disclose them, until our US partners agree with it… I repeat that we have rather positive than negative attitude [to these agreements] and we hope the promises given by the US administration will be fulfilled."