Status: OUT
The GoF pattern ecosystem rests on two independent prerequisites: interface inheritance provides polymorphic substitutability (validated by LSP's behavioral contracts), while creational patterns provide flexible instantiation — without either, composition-based patterns cannot be applied.
Substitutability (interface inheritance) and instantiation flexibility (creational patterns) are orthogonal prerequisites that jointly enable the full pattern catalog
Depends on (SL): interface-inheritance-enables-pattern-ecosystem, creational-patterns-enable-composition-reuse