How does the Combo Agile Opportunist and Cunning Bard work?
Some people say you can only get opportunity attacks when an enemy triggers the OA. So you can't slide your ally with power/skill x and let swing his sword with agile Opportunist?
Forced movement never provokes opportunity actions.
However, agile opportunity allows for you to make a melee basic attack as an immediate reaction which is not an opportunity action. You can absolutely use it with the Cunning Bard's sliding shenanigans.
The only catch here is it cannot be the ally's turn as they would not be allowed to take an immediate action on their turn.