On playend

on <level>:PLAYEND:<commands>

The on PLAYEND event triggers when the /play command has finished playing a file.

Example:

on 1:PLAYEND:{ echo -a The play command has finished playing $filename }

Note that you cannot halt the "* Playback of 'file.txt' complete" -text with this, you'll need to do /.play to halt the "* Playing 'file.txt' to #channel with 1000ms delay" and "* Playback of 'file.txt' complete".