V85R1: Cross-Scale Consistency Test of Update-Driven Cosmology — A Unified ρ(t) Engine from Degeneracy Diagnosis to Falsifiable Cluster Signatures

We propose a cross-scale consistency test for Update-Driven Cosmology (YAGC), requiring a single shared parameter set θ to simultaneously confront macroscopic gravitational phenomenology, cosmological dark-energy evolution, and microscopic generation depth. We demonstrate that single-system galaxy fits exhibit degeneracy, and introduce a subsample strategy for galaxy clusters (relaxed vs. merging at fixed mass) yielding a falsifiable YAGC signature: ~8.4% temperature enhancement in merging clusters. The same shared θ flags a detected inconsistency in the microscopic sector—this is not overfitting but a diagnostic success revealing where unification breaks. We conclude with explicit failure conditions: if robust relaxed-merging splits yield ΔT → 0, the framework requires revision. This discrepancy is not a flaw to be eliminated, but a structural signal.