Status: IN
The recursive structure subsystem achieves fully engineered bidirectional processing: NullIterator and Chain-of-Responsibility's Composite-backed routing provide special-case-free traversal top-to-bottom and request routing bottom-to-top, while the subsystem's validation-and-governance (Interpreter validating completeness, SOLID governing selection) ensures this bidirectional infrastructure is both proven complete and disciplined in use.
Bidirectional recursive processing (traversal + routing) is completed by the same subsystem that is independently validated and governed
Depends on (SL): chain-routing-completes-recursive-traversal-infrastructure, recursive-subsystem-validated-and-governed