I might be missing something, but i was looking at a possible list of all events that can be used against the autocmd command. For now i have only seen the DirEnter, i imagine there might be more ?
The reason being is that i was looking at possibly making some use of the ipc / rpc communication to signal back to vim when a file is created, removed, renamed, and since there are multiple commands or keys that might produce such results (e.g. for rename - cw and :substitute), sounds like a good idea to have them handled in one central place.