I was looking into writing a script to manipulate SLPs and I can use nbstl command to do that. However, in some cases it is just easier to copy an SLP to a new one. I couldn't find the equivalent of "Copy to New..." action of the GUI in the command line details of nbstl.
Is there another way to do it via command line?
There doesn't appear to be a documented way to achieve a quick copy of an SLP. So, instead, maybe you could list an SLP in to output in json format / layout, and then re-read the json file and then use the read entries to feed into a create and modify commands.