#A.19.CN:Close

Preface node heading:a-19-cn-close:20955

#Content

A.19.CN gives A.19 some teeth: a CN‑Spec you can put on one page, a Registry that stops sprawl, Bridges that carry explicit loss, and a checklist + harness that make comparability auditable. It obeys the mandatory pattern structure of Part E (style, checklists, DRR, guard‑rails) while remaining tool‑agnostic and context‑local.