Status: IN
Composite and Decorator's bidirectional interoperation (Composite treats decorated components as leaves; Decorator treats composites as components to wrap) validates the recursive infrastructure's compositional flexibility: both patterns share the same recursive composition mechanism, and their seamless interoperation demonstrates that the infrastructure supports not just single-pattern recursion but multi-pattern recursive composition.
Composite-Decorator interoperation proves the recursive infrastructure supports cross-pattern composition
Depends on (SL): composite-decorator-complementary-used-together, recursive-structure-complete-infrastructure