@mkemp Please make sure you don’t ‘drop’ any of the existing Client Web Fragment locations on the way, as Atlassian did with bitbucket.pull-request.nav which never got fixed!
IMO CWF to CSE extension warrants a separate RFC for Bitbucket DC. Can you please compile a list with existing non-CSE extension points and the equivalent post migration, something like the BBDC 7 announcement a while back.