I think a lot of people/companies are integrating workflows like that, it's just separate from the point of agent pair coding.

The interesting thing here is agents working together to be better at a single task. Not agents integrated in a workflow. There's a lot of opportunity in "if this then that" scenarios that has nothing to do with two agents communicating on one single element of a problem, it's just Agent detect -> agent solve (-> Agent review? Agent deploy? Etc.)