Hi,

  Would it be acceptable to add a conversation termination request token in Weld? 

If found in the request parameter map (e.g. named "nocid"), the WeldPhaseListener.getConversationId would return null. This could be used in commandLink f:params to stop conversation propagation. The problem is that there is no(?) nice way of getting rid of the cid after the ConversationAwareViewHandler adds it for non-transient conversations since it ends up in the form action and not per-component.

As I see it, it's not breaking the specification and would just be a usable add-on with little foreseeable side-effets.