in reply to .dancer -- what's it for
a short search pointed me to perl-dancer-conference-2015-report
> It is recommended to add an empty .dancer file to your app’s directory, which indicates that this is a Dancer app (other Perl frameworks do similarly).
PPS the meaning of this file to be there is exposed in the above github issue:
> There's no reason why we shouldn't generate this file. It might help move away from the bin/lib directory checks.