Status: IN
Composite's parent references naturally define chains of responsibility, making Chain of Responsibility an emergent behavioral capability of part-whole hierarchies: requests can propagate up the Composite tree without additional infrastructure because the parent links that define the hierarchy simultaneously define the handler chain.
Two independently stated facts (Composite parent refs, Chain reuses existing links) converge on the structural-behavioral integration point where Composite's hierarchy IS the Chain
Depends on (SL): composite-parent-refs-define-chain, chain-of-responsibility-uses-existing-parent-links