Share milestones from one project into second project

I have two projects. Project A has a milestone that I would like to display—and use as a prerequisite—in Project B. I could do this by hand, but as Project A changes often, that’s a lot of work. How can I set up this relationship, so when the milestone updates in Project A, that’s reflected automatically in Project B? Thanks.

@gregmaletic It is not currently possible to set up a dependency between tasks in two separate projects. I’ll attach your comment to our open feature request for this functionality however - it’s helpful to know that this would be useful in your workflow!

Is there any way to do something like this via publish and subscribe, or any of the other collaboration technologies? Thanks!