Galactic Rotation Curves, Baryonic Tully–Fisher Scaling, and Dark Matter Mimicry from Latency Gradients in a Finite-Capacity Universe

We construct the galactic dynamics branch of the finite-capacity latency–erasure framework and show that the phenomenology commonly attributed to particle dark matter emerges from baryon-sourced latency structure in a finite-capacity universe. In this framework, visible matter does not act only through the Newtonian potential it sources. It also loads the underlying realization substrate, generating a radial realized-load profile and an associated latency field Because galactic disks are extended finite-capacity systems rather than isolated point-mass configurations, the spatial gradients of the latency field contribute an additional radial term to the effective orbital dynamics. This latency-gradient contribution becomes subdominant in high-acceleration inner regions, preserving the ordinary Newtonian limit, but grows comparatively important in low-acceleration outer disks, where it supplies the missing centripetal support required by observed flat rotation curves. From this structure we derive the asymptotic galactic acceleration law of the finite-capacity branch, show how approximately radius-independent circular velocities emerge in the outer disk, and obtain a baryon-controlled dark-matter-mimicry regime without invoking exotic nonbaryonic halo particles. We then show that the same finite-capacity scaling yields the baryonic Tully–Fisher relation as a direct consequence of the latency-gradient branch rather than as an imposed empirical fit. The observed coupling between visible baryonic mass and outer-disk orbital speed is therefore elevated from phenomenological regularity to dynamical consequence. This construction integrates the galactic missing-mass problem into the existing FCLET canon. The same bounded-realization architecture that governs weak-field gravity, matter coupling, cosmological moderation, perturbative structure, stochastic sectors, and strong-field completion now also governs disk-galaxy rotation support. Dark matter phenomenology at galactic scales is thus reinterpreted as the macroscopic signature of a finite-capacity gravitational substrate. The result is a unified baryon-driven explanation of flat rotation curves and Tully–Fisher scaling from latency gradients alone.