A.16.0:16 - Boundary notes
A.16.0 does not replace C.2.2a / A.19 position semantics, A.16 move guards, A.16.1 cue-pack semantics, A.16.2 retreat / retirement semantics, B.4.1 seam entry routing, B.5.2.0 abductive prompt species, E.17 face typing, E.18 selected transformation-flow structure, or any endpoint-local repair logic.
Its job is narrower: publish one intelligible history package where lineage, branch, loss, retreat, retirement, next-use docking, or a separately established responsibility handoff is load-bearing. It does not turn those different relations into one handoff relation.