-1. Move the Pretty class into its own module.
-2. Implement pretty printing of Domains to clean up the doctests.
-3. Add exactly-63 test to labels.
+1. Use a typeclass for all the length operations on Domain types.
+
+2. Write a library for Nagios plugins (or "Monitoring plugins" as the
+ Perl library now calls them).
+
+3. Add a CLI nagios-check-harbl (or whatever) executable that utilizes
+ the harbl library and reports erros in a Nagios-friendly format.