c992eb93df
Destructive terminal iteration. Safe order: oracle-capture →
migrate corpus → remove it.2 exemptions (the migration-completeness
gate) → remove tail machinery + 18g.1 husk-dec → DESIGN/drift
lockstep → accept. DD-4 carries the OQ1 RC-RSS contingency as an
explicit RED-gated step (Task 5.5) with named remediation
(owned-loop-binder-drop-on-recur, Task 5b) per the corrected spec.
DD-5 keeps is_false (shared with drop_iterative). Class-(b)
enumeration is a live sweep (Task 1.3, spec-delegated). Spec
fda9b78 + corrections 2018178/10a0595.