on [<modes>]unload [<serial#>] [-|^]<match> { <action> }

This hook is triggered whenever the unload(5) command is issued to unload a packaged script.

(NOTE that passing more than one argument to /package may cause future incompatibilities, and should be avoided at all costs)

To inform the user that a script is exiting:

 on ^unload "superscript *" {
    xecho -b SuperScript exiting. To infinity, and lots farther!
 }