Weld 3.1.0.Beta1 was released yesterday.
Along with bunch of other fixes and/or features, this release contains first API for
CDI context propagation.
Weld docs contain more information on how to do that along with an example.
If you have a use case for this, please give it a spin.
The API is a first draft which was done with
MP Concurrency needs in mind and probably won't cover all the cases.
Which is precisely why we appreciate any feedback in this regard, we cannot cover use
cases we don't know about :-)