Release: the B0 stop rule applies

: the B0 stop rule applies{ Constructed here: the handoff audit; the distinction between source weighting and density weighting; the weighted Euler identity; an explicit Einstein–Hilbert layer discrepancy; and a variational integrability test.

Overall ending: Unresolved. The supplied XII-A-v2 does not contain the changed-model handoff required by the production specification. Accordingly this manuscript does not define the new cubic retarded response and does not claim B1–B4 constructed.

Not inferred: a forbidden wavefront tuple for a correctly specified new insertion, a plateau obstruction for that insertion, or nonexistence of a density-ramped model.

XI-G's original class obstruction remains closed. Missing handoff data are not a physical no-go theorem.}