The New AMetric Boundary Endpoint of Black Holes

This manuscript gives an AASC-internal endpoint-normal-form theorem for the unresolved horizon-isolated residue of a black-hole endpoint at maximum governance-depth. It imports the fixed-domain kernel, AMetric boundary normal form, licensed Einstein-projection theorem, horizon isolation and no-totalization results, standingless-interior and residual-coherence results, matter-energy residualization, and null-regime closure. The paper does not rederive AASC; its burden is endpoint classification under those locked dependencies. General relativity is not treated as an independent primitive background that AASC later criticizes. Rather, AASC first licenses the metric regime and imports the Einstein-form projection as the minimal same-scope metric projection. The endpoint theorem then classifies the boundary at which that licensed projection no longer has governance authority for the unresolved residue. Let (BH) be the horizon-generated reference-standing burden, let (W_{\mathrm{ext}}(BH)) be the portion resolved by standing-bearing exterior witness relations, and let (R_H = BH \setminus W_{\mathrm{ext}}(BH)) be the unresolved horizon-isolated residue. If (R_H \neq \varnothing) and residual metric-comparison support exhausts at maximum governance-depth, the endpoint cannot coherently be classified as a classical singularity, remnant, information archive, storage site, bounce, wormhole passage, transfer endpoint, or admissible null regime. Each alternative requires a metric, temporal, causal, carrier, source-ledger, or operator role whose old-scope authority has ended. The remaining closure-status is a New AMetric Boundary. This boundary is not the geometric horizon, a spatial surface, or a dynamical event. It is the structural endpoint exposed when the unresolved residue can no longer continue, totalize, repair, support a singularity diagnostic, or terminate as admissible nullity. Nothing old-scope crosses: no standing, reference, information carrier, source or energy ledger, matter, field, law, metric, causal chain, memory, or global-state coordinate persists as inherited content. The result is therefore not an information-destruction or energy-nonconservation event; those predicates require the very temporal, causal, metric, and ledger structures whose cross-boundary authority has failed. The theorem establishes endpoint status and origin-condition analogy to the AMetric starting condition of a realized physical interior. It does not establish the contents, laws, metricity, population, or concrete instantiation of any post-boundary domain.