Variational Backbone and Regime Closures IX: Classical mechanics as a residual-controlled R3 readout Hamilton–Jacobi residuals, Newtonian force readouts, and the standard-CM gate

VBRC treats classical mechanics as a residual-controlled interface readout of the R3law-space. Under the Internal Invisibility Principle, protocol-relative unread content appearsin the Hamilton–Jacobi and trajectory language only through licensed summary residuals,so classical mechanics is recovered as a gated readable regime rather than assumed as aprimitive law.This paper reformulates classical mechanics as a residual-controlled R3 readout of thefixed VBRC core densityecore(IR, F) = β2|DRIR|2 +α2|F|2 + η ⟨IR, F⟩, F = ΣH,P (II ),inherited unchanged from Part I. Part III already generated the conservative R3 law-spacefrom this core. Part IX does not rederive that law-space. It asks the question one stepdownstream: when does an already-derived R3 law admit a Hamilton–Jacobi/trajectoryreadout?The resulting law is not, in general, standard classical mechanics. On a single-phase,non-nodal, residual-controlled regime one obtains∂tS + H(x, ∇S, t) = RS, ∂t(A2) + div(A2v) = RA,where RS and RA are the only licensed classical-channel images of unread, virtual-boundarycontent relative to the declared classical protocol. For a mechanical Hamiltonian H =|p|2/(2m) + V this gives the residual-Newtonian lawmx¨(t) = −∇V (x(t), t) + ∇RS(x(t), t).Thus standard Hamilton–Jacobi/Newton mechanics is not the generic output of Part IX.It is the residual-free or residual-suppressed comparison gateRS ≈ 0, RA ≈ 0, ∥∇RS∥ ≪ ∥∇V ∥of the more general VBRC–CM law. The generic law carries an explicit licensed unreadsummary residual.The paper identifies the gates under which this residual classical readout is licensed atfixed ℏ, and records the exit conditions at which the trajectory narrative must be replacedby another admissible representation. In the Schrödinger anchor, RS = −Qℏ, so the Bohm–Madelung quantum potential is read here as the phase residual of the declared anchor. Withina fixed R3 anchor and gate, Schrödinger, WKB, Hamilton–Jacobi, and Newtonian mechanicsare readout levels of one retained R3 law, not independent laws. No additional external force,source, or fitting term is added at the classical-readout step.