Status: IN
The registry meta-mechanism (Prototype Manager and Singleton Registry converging on key-to-instance lookup) and the controlled-sharing meta-pattern (State-as-Singleton and Flyweight-via-Factory converging on creational sharing infrastructure) are two layers of a single creational infrastructure stack: registries provide the lookup mechanism while controlled sharing provides the instance management policy, together enabling the GoF's cross-category sharing architecture.
Two independently identified meta-mechanisms (registry lookup + controlled sharing) form complementary layers of the same creational infrastructure
Depends on (SL): registry-meta-mechanism-spans-creational-patterns, controlled-sharing-meta-pattern