Status: IN
Prototype and Builder represent opposite product-coupling extremes in the creational pattern space: Prototype is maximally coupled to products (Clone must deeply replicate internal structure, and separate Initialize methods are needed because Clone cannot take varying parameters), while Builder is maximally decoupled (products need no common parent class, construction can even analyze without creating any product at all, and build methods default to no-ops).
Opposite positions on the product-coupling axis define the creational pattern design space boundaries
Depends on (SL): prototype-constrained-by-clone-complexity, builder-maximally-decoupled-from-product