Is there any easy way to know which app command is choosen by the snap runtime?

I currently have the following apps stanza in my Snapcraft project file:

apps:
  vt-cli: &vt-app-defs
    command: bin/vt
    command-chain:
      - bin/snap-maintenance-launcher.sh
    completer: etc/bash_completion.d/vt
    plugs:
      - home
      - removable-media
      - network

  vt: *vt-app-defs

However, when I tried to differentiate the two in the snap runtime in a launcher script, I found nothing in the environment that makes this possible(the first argument of the launcher script is always $SNAP/bin/vt, and nothing in the environment variables hints at the actual app name being triggered.

Can we introduce another environment variable (e.g., SNAP_APP_NAME) to tell us just that?