Child themes: disabling the parent

Not using the current system. In order to serve as a valid Template for a Child Theme, the Parent Theme must exist, and be a valid Theme. That’s because the Parent Theme’s template files must be accessible via locate_template(), in order for the Child-Parent fallback to work properly.

Note: if this core Trac ticket is implemented, then you’ll be able to filter locate_template(), which would conceivably enable you to put your Parent Theme in a separate location, not accessible by Dashboard -> Appearance -> Themes.