Status: IN
Composition is the validated default reuse paradigm — convergently evolved from multiple independent trajectories and doubly grounded in scalability — with Template Method marking the precisely bounded exception where inheritance is justified: composition's rightness is established by convergence, its scalability by theoretical and practical evidence, and its scope by the narrow inheritance zone that Template Method defines.
Composition as validated default + Template Method as precisely bounded exception = complete reuse decision framework
Depends on (SL): composition-convergence-scalably-grounded, template-method-inheritance-bounded-by-composition