Closes two of the three queued debts from the 18g tidy in the
same session. Tag-conditional partial-drop helper stays queued
— substantial, no observable fixture, all current fallback paths
cleanly use shallow ailang_rc_dec.
The 18-arc + 18g sub-arc + 18g tidy + post-tidy follow-ups are
all closed. Decision 9 has been re-framed to match the
orchestrator's dual-allocator stance (commit f10a77e). Next iter
is queue-driven; nothing load-bearing is open.
Brummel
ed9d6df52b