Nice effort.

I would highly recommend using @EXPORT_OK as opposed to @EXPORT. The latter forces the sub names into the caller's namespace. Even though you only have a single sub in most cases, it's still nicer to not pollute a namespace automatically:

our @EXPORT_OK = qw(
    sub_one
    sub_two
    sub_three
);
 
our %EXPORT_TAGS;
$EXPORT_TAGS{all} = [@EXPORT_OK];
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Now, you can do:

use My::Module qw(sub_one sub_three);
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...or even:

use My::Module qw(:all);
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...which will import all @EXPORT_OK listed subs.