A few more words about this: it took a while to get to this point, but the internals are pretty flexible thanks to that. This is how Scout is able to show a controlling task of a msg port easily or safely update the data of a Task, etc. At this stage the Exec module still isn’t complete - I want to add detail views for Message Ports and Semaphores and list a few more Exec lists. The Message Ports and Semaphores will be reused for Intuition and other modules later on.