We are about to start a new project that is expected to be over about 8 weeks of 2 week sprints. We are attempting to implement this in an agile manner and so we have recently had a sprint planning meeting.
During this meeting we identified the stories to be implemented in the first sprint. Towards the end of the meeting I asked our project manager who is also acting as the primary tester if we could have the acceptance criteria written before the sprint starts (for the first sprints work). She gave me a strange look and said "na, that's not going to happen". Apparently she is too busy and won't be able to do this in time. They may be available towards the end of the sprint if we are lucky.
In agile, how important is it to have the acceptance criteria spec'd before the sprint starts. Should I push back and suggest the sprint is delayed until these are available, or just go with it and accept they will be done when they are done?