Quantum Entanglement as Boundary-Level CompatibilityUnique Same-Domain Admissible Classification on the Bell Scope This paper develops a fixed-domain structural classification of quantum entanglement within the AASC admissibility-and-standing framework. The manuscript does not introduce hidden variables, modify quantum mechanics, derive the Hilbert formalism from below, or propose a new signaling mechanism. Instead, it asks a narrower and more structural question: once Bell-type operational data are treated as invariant reusable witness content on a fixed domain, what admissible same-domain classification of those correlations remains? The paper argues that Bell correlations are not best understood as: independently complete local states later connected by a mechanism, hidden-variable value assignments, superluminal signaling, or repair/completion events triggered by local measurement. Instead, entanglement is classified as: a joint standing class carrying tensor-level compatibility constraints sampled locally through admissible realization acts without transmitted influence or local value completion. The manuscript develops this classification through: Bell-witness fixation, admissible same-domain reuse, quotient-level compatibility structure, tensor compatibility classification, Bell-scope asymmetry exhaustion, no-signaling preservation, boundary-trace witness anchoring, and Bell-scope constructional exhaustion. The paper further argues that the appearance of instantaneous correlation is an interior metric-bookkeeping effect rather than evidence of superluminal transmission. Tensor compatibility is fixed at an admissibility-level boundary prior to metric representation, and local measurements are later admissible local realizations of that already-fixed compatibility structure. A persistence-bearing continuation bridge is also developed, connecting Bell witness reuse to realized experimental domains and admissible continuation structure without turning the paper into a generalized ontology proposal. The resulting picture differs from both standard hidden-variable and collapse-style interpretations: hidden-variable approaches attempt to fix local values, signaling or collapse approaches attempt to complete distant states through transmitted change, while the present paper instead classifies Bell correlations as irreducible joint compatibility constraints carried by a standing-preserving tensor structure. The paper is therefore classificatory and eliminative rather than mechanistic. Its central claim is not that admissibility “explains” Bell correlations, but that reusable Bell witness structure strongly constrains how those correlations may be coherently classified on a fixed domain. This paper is downstream of: Minimal Conditions for Admissible Construction The Structure of Admissibility