Actually, both the implication of permanent attachment and spatial rather than temporal seem to fit. The first is clear cut--it is a permanent modification, unlike some of the other modules that support unwrapping.

The second is more of how you think about it. I think about it as a code block that's inserted at the very beginning, i.e. "as a string", so

prepend foo => sub {
  # Remove the invocant.
  shift;
};
sub foo {
  print shift;
}
[download]

is equivalent to

sub foo {
  {
    # Remove the invocant.
    shift;
  }
  print shift;
}
[download]

That doesn't mean I'm set on prepend. Spelled-out suggestions are still welcome.

lodin