Status: IN
Classification permeability in the GoF system is dual-validated: at the pattern-migration level, patterns systematically cross Creational-Structural-Behavioral boundaries while SOLID governs from above; at the construction-computation level, Builder-Visitor's bidirectional functional duality demonstrates that construction and computation are architecturally permeable despite being pedagogically distinct — the validated system is governable precisely because governance transcends the same boundaries that patterns freely cross.
Two independent demonstrations of classification permeability (migration and role-reversal) converge under the same supra-classificatory governance
Depends on (SL): validated-system-classification-permeable-yet-governable, builder-visitor-duality-validates-construction-computation-permeability