Michael Bratman has been doing work in this area for some time. His work is usually pretty good, but I haven't kept up with his most recent stuff. He has a 2014 book,  Shared Agency: A Planning Theory of Acting Together, and the earlier, Structures of Agency (2007). His work goes back to Intention, Plans, and Practical Reason (1987), which is excellent, but doesn't use complexity theory, which I think is highly relevant to agency. His web page is http://philosophy.stanford.edu/profile/Michael+Bratman/

There is lot more there, including links to books and articles. If you don't know his work, David, it is very relevant to your interests, but much more from a traditional philosophical viewpoint.

Thanks, John. I'm aware of Bratman, who is really big in this area as you say. I'm really looking for a kind of comparative review that puts him in context of competing/alternative theories of planning. 

Thanks. I should perhaps have made more clear that I mean planning in practical reasoning (and cognitive science or AI) rather than in the sense used in town planning, project management, etc.