Status: IN
Chain of Responsibility's receipt-not-guaranteed liability is structurally mitigated when chains follow Composite's parent references: the tree structure guarantees a root terminus for every chain, existing parent links eliminate explicit chain construction, and the natural part-whole hierarchy provides semantically meaningful escalation order from specific to general handlers.
Composite's tree structure provides exactly the structural guarantee Chain lacks on its own
Depends on (SL): chain-flexibility-reliability-tradeoff, composite-chain-natural-integration