Perl debugging initialization: did I just reinvent the wheel?

[mpersico]

I have worked out a system that allows me to maintain breakpoints in the Perl debugger from session to session and load them up next time I run the debugger:

First, I create a ~/.perldb file that contains:

## -*- cperl -*-
sub afterinit {
    use Cwd;

    my $dbg = getcwd(). "/.perldb";
    print "$dbg...\n";
    if ( -e $dbg ) {
        no strict;
        do $dbg;
    }
}

Then I create a local .perldb file in the current working directory where I run  perl -d:

## -*- cperl -*-
push @DB::typeahead,
  'f Some.pm',
  'b 75',
  'f bin/mymainscript',
  'b 180',
  'b 192',
  'L';

So, my questions are:

1) Is this technique widely enough known that I would look like an idiot for blogging about it?

2) Is the usage of @DB::typeahead unsafe in that it's a direct tap into the DB module that may be changed and, therefore, should not be promoted?

Thank you.