Just thinking out of the box a little.
Can I send a text file or other format to VoxCommando and have it use the file as if I had said the command verbally?
text file containing...."Stand by"....phrase, then VC command VC.Standby to be initialized?
or is there a command line tool for VoxCommando?
Yes with folder watcher plug in
If you use the custom Google search on the wiki home page or on the VoxCommando support page for terms like "command line", "API", and as Haddood mentions, "Watcher plugin", you should find all the info you need on the various ways to communicate with VC.
http://voxcommando.com/home/support/
http://voxcommando.com/mediawiki/index.php?title=Main_Page