Unexpected restriction on specific RST directives / compatibility with Breathe Sphinx Plugin

[elfman2]

Use case: include doxygen directive through breathe sphinx extension strictoc export or strictdoc server

error: problems when converting RST to HTML: :1: (ERROR/3) Unknown directive type "autodoxygenfile".

.. autodoxygenfile:: test.c :project: TEST

OK with --formats rst

I understand that the export html rendering cannot handle this (could ignore & warn ), but the UI should be able to edit those directive.