Hi Eric,
MU (multi-line) input is not supported currently. In fact, the composeform CLI feature is very limited. I’ve been working on a re-write of the templates engine for a few months, and enhancements to the CLI composeform is one of my priorities.
There is still no support for MU input, but it’s on my TODO list. My initial thoughts are to implement this by firing up the EDITOR just as we do with the message body. However, we could also consider accepting multiple lines in a loop and terminate once we get a blank line. Not sure what’s the best approach.
—
73 de LA5NTA / Martin