That will be a feature of Seam3, correct.
Can't it be a PE to CDI that may be used by Seam3 and other frameworks??
Feature of Seamis equivalent to a PE since Seam 3 will not have a customized Weld as core. Therefore, a PE to Seam 3 is a PE to any CDI implementation/framework. Seam 3 being the example here.