#!/usr/bin/env perl
use utf8;
use 5.14.2; # for s///r
use strictures;
use Template;
use Path::Tiny;

# Mocking… you'd replace with your actual routine.
sub Path::Tiny::textify { # Monkey patch.
    my $self = shift;
    join " ",
        map ucfirst,
        split /[\W_]/, $self->basename =~ s/(?<=\w)\.\w{1,3}\z//r;
}

my $tt2 = Template->new;

my @files = grep $_->is_file,
    path(".")->children( qr/\A[A-Z].+/i ); # Should probably have \z too.

$tt2->process(\*DATA, { files => \@files })
    or warn $Template::ERROR;

__DATA__
<ul>
[%-FOR file IN files %]
  <li>
      <a href="./[% file.basename | uri %]">[% file.textify | html %]</a>
  </li>
[%-END %]
</ul>