Status: IN
Prototype Manager and Singleton Registry both employ the same registry meta-mechanism (associative store mapping keys to instances) to decouple clients from concrete class knowledge, revealing an unnamed recurring abstraction within the GoF's creational infrastructure.
Both patterns independently converge on the same key-to-instance lookup mechanism for the same purpose (decoupling client from class hierarchy)
Depends on (SL): prototype-manager-registry, singleton-registry-for-subclass-selection