I've been staring at the (very well written!) manual for a while here and I think the answer to my question is No, from what I've read. But maybe I've missed something, so thought I'd ask.
I would like to do a voice command of prefix-suffix type, except that the suffix is the next voice input, passed through. Like "warp .45", where "warp" tells VA to send a tilde (get into console) and type "warp " -- then the next words after that should be sent through as characters, "point four five". Then maybe an end indicator, like the word "endit"... which causes VA to send a newline/cr, then wait N ms, then exit console.
It looks like this is not an option -- and if it isn't, then I can set up several prefix-suffix pairs for most commonly used warp values (1.0, .75, .50 etc) and be content. Just curious, finding out the limits of the tool...