Hello Thenothing,

I am not familiar with PSGI/Plack but I read your question Perl - Call subroutine of main namespace from package and I think you are looking for something like that:

main.pl

#!/usr/bin/perl
use strict;
use warnings;
use Data::Dumper;

use Mypackage;

sub callingTest {
    my $object = new Mypackage();
    return [ 200, [ "Content-Type" => "text/html" ], [ $object->test()
+ ] ];
};

print Dumper callingTest();

__END__

$ perl main.pl
$VAR1 = [
          200,
          [
            'Content-Type',
            'text/html'
          ],
          [
            'from test'
          ]
        ];
[download]

Mypackage.pm

package Mypackage;

sub new {
    my $class = shift;
    my $self = {};
    bless $self, $class;
    return $self;
}

sub test {
    return "from test";
}

1;
[download]

Hope this helps, BR.