I give up. I've spent a good amount of time on Google and maybe it's just because it's Friday afternoon, but I cannot find my answer.
I am trying to play with 2013's ability to replace built-in commands. I see that I can look through the journal file to get commands. I also found a nice Excel sheet that listed a lot of the command IDs already. The Command ID I am looking for does not seem to be in the Excel file, and looking through the Journal file gives me no help in figuring out what the command ID is.
I am specifically flooking for the Add a Leader under Symbol command, but would love to know how to determine it myself.
From what it seems, many Revit actions are not performed using commands - actions can be taken directly in controls which seems to be happening here. So it seems we cannot get/use the CommandId to replace this functionality.
If you need a workaround, I am thinking if you can use the IUpdater mechanism to track for newly added symbol and take some steps as appropriate.