Status: OUT
The recursive subsystem's fully engineered bidirectional processing — NullIterator-enabled forward traversal combined with Chain-of-Responsibility backward routing through Composite parent references — achieves structural completeness but with an asymmetric reliability guarantee: traversal always reaches every node, while routing may traverse the entire chain without any handler accepting the request.
Bidirectional processing is structurally complete but routing direction lacks guaranteed receipt
Depends on (SL): recursive-subsystem-bidirectionally-engineered, chain-routing-completes-recursive-traversal-infrastructure