XVIII-B: a free stress-response benchmark, not a clock certificate

The supplied XVIII-B, version 2, record describes one free massive scalar stress response on classical Minkowski spacetime: spin-two and spin-zero vacuum spectral densities, its stated once-subtracted retarded prescription, a scaling-degree bound at most eight, transverse contact normalization through the specified momentum jet, linear transversality, and a preparation-layer residual vanishing on the stated plateau CheungXVIIIB.

This paragraph reports that benchmark's scope. No spectral density, dispersion integral, subtraction convention, or normalization coefficient is recomputed in the present paper. In particular, the number and location of subtractions must be read within the benchmark's actual form-factor and tensor conventions, not assigned to an unidentified relational kernel.

The comparison is useful because it names:

It is not a construction of the companion harmonic scalar, original-rod lapse, interacting gravitational product, or inherited characteristic coefficient.

The input Minkowski metric is not derived. The stress response is neither Fröb's relational correlator nor VII-H's free massless susceptibility Frob,CheungVIIH. Choosing $m>0$ in this benchmark does not discharge the conditional massless insertion obstruction of XVI-N or its spatially compact Route B CheungXVIN.