Number of configs whose virtual_path begins with this prefix that are visible to the authenticated viewer. Always 0 or greater.
The leading path segment of the config's virtual_path, always slash-terminated (e.g., "agents/", "__editor/"). Pass this value as the path_prefix filter to narrow config listings.
A facet entry grouping configs by their leading path segment, returning the prefix and the number of matching configs visible to the authenticated viewer.