We present a phase-A audit of a cross-scale response framework that connects galaxy-scale mass discrepancies, Solar-System post-Newtonian constraints, and precision-clock residuals through a common state sector Z. The observables on the three scales are not identied with Z directly, but are treated as distinct projections GZ, ρb, PZ, ρ⊙, CZ, geometry of the same underlying response sector. On a bridge-ready SPARC subsample of 139 galaxies, the trigger axis x≡log10 (gbar/a0) supports a robust monotone ordering of the dimensionless mass discrepancy Ξgal= gobs/gbar−1, with Spearman rank correlation ρs ≈−0. 74. Fixed- parameter saturating and logistic families of Z (x) calibrated on the galaxy side survive transfer into a solar integral proxy of Solar-System projections without recalibration of the Z-sector, yielding proxy-level post-Newtonian projections below current Cassini and lunar- laser-ranging bounds. An extended audit along the exact-SPICE EarthSunCassini signal path spanning deterministic geometry-derived kernel projectors, time-resolved channel proxies, minimal two-way ts, and cross-family reference control leaves the transferred state-sector response small and dynamically stable across all tested stages, with the best-case kernel projection approximately eight decades below the Cassini proxy bound. The cross- family stage makes the structural limit of a public-data audit explicit: a radio-science-based γ-extraction is not reconstructable from publicly archived ephemerides alone and is therefore agged as a collaboration-stage task. The high-g asymptotic used in the clock-side audit is set by the saturating benchmark, log10 Zsat (x) ≈−0. 094−0. 583 x; the currently parame- terized logistic benchmark does not share this asymptotic level and is carried through the audit only where its status is independent of the high-g extrapolation. On the clock side, we use the SrSr bre-linked comparison of Lisdat et al. (2016) as the rst genuine residual benchmark, with ΞLisdat clock = (4. 7 ±5. 0) ×10−17 after an explicit GR/geopotential correction of (−247. 4 ±0. 4) ×10−17. This immediately excludes the identication Ξclock = Z: the Lisdat residual lies approximately ten decades below the high-g asymptotic level of Z. A rst structure-related laboratory projection operator closes about 6. 45 of these decades but still overshoots the measured residual by about 3. 4 decades. Subsequent transfer tests of the laboratory operator class against further architectural classes further characterize this projec- tion. The two-site Grotti et al. (2018) transportable-clock comparison excludes any universal form of the projection: an explicit Lisdat-type link term is structurally incompatible with a two-site architecture at approximately three decades of signicance, while a reduced no-link form is compatible but not positively validated. The redundant Boulder Atomic Clock Op- tical Network (BACON Collaboration, 2021), which simultaneously measures three optical frequency ratios, admits a narrow but geometrically compact strict-structural-success sector characterized by vanishing remote coupling, near-unit pair symmetry, and a small residual local amplitude, reproducing both the absolute scales and the internal rank ordering of the three ratios. The three tested architectures therefore populate three qualitatively dierent reductions of a common operator class rather than a single universal laboratory operator. A 1fair comparison conrms that the standard loglog radial acceleration relation remains em- pirically more compact than the Ξ-representation used here. We therefore frame the present work not as a completed closure but as a decision-oriented status audit: the common state sector remains viable at the present audit level, the direct clock identication is excluded, the solar projection is structurally plausible, and the clock-side projection is populated by three architecturally distinct reductions rather than by a single universal operator. The data are consistent with a common state sector Z and a small architecture-dependent operator family Cclosure, C2site, Cnetwork, with the derivation of these reductions from an underly- ing principle, and a realistic signal-path audit of the Solar-System branch, identied as the leading open problems.
Jan-Frederik Flügge (Sun,) studied this question.