First I think that the command name is not well chosen.
It should not refer to any "remote" stuff, since there is nothing
"remote" about this (although, from your point of view, it might
look like a "remote" command). It is simply a command like
all the others. Following the naming conventions of the other SVDRP
commands I would suggest to use either CUTR (as in CUT Recording)
or simply EDIT (since there is nothing else to CUT).
Second, I wouldn't use the file name as indicator, but rather the number
in the list of recordings, as it is done in the DELR command.