Note that this is not retiring the index; you will still be able to search for and find packages there. What this is doing is moving the ROS 2 documentation that is hosted there to https://docs.ros.org . Once the transition happens, there will be redirects from all of the old pages to appropriate places on https://docs.ros.org . I’ll drop another note here once the transition actually happens. As before, if you notice problems after the switch, please reply to this thread and we’ll look into it.