Next time you're out there writing some code for a custom WordPress theme or plugin, try thinking about adding colons or dots to your hook names. It makes it much more readable and easier to understand the separation between components and the function of the hook.
# before apply_filter('jwk_podcasts_default_url'); # after apply_filter('jwk:podcasts:default_url');
# before do_action('jwk_podcasts_rest_api_init'); # after do_action('jwk:podcasts:rest_api:init');
It's really fun and makes keeping track of what your hooks really do a little easier. Have fun!