Apologies if this has already been submitted/explained somewhere, but a search of the site didn't turn up anything.

I'm looking to migrate a set of tasks from JIRA to Phabricator using the Conduit API. One capability that seems to be missing in the Conduit API is that of being able to add a "blocking" task using the update-task method. Being unable to add blocking tasks/sub tasks using Conduit is a significant obstacle to using it for any major porting of JIRA tasks (and I'd assume, any other bug tracker).