Support geometry and nonuniform small-entropy limits in Gaussian transport

AI-assisted, unrefereed research candidate on the Wasserstein distance between Gaussian entropic joint plans and their entropy-selected limits. The paper studies arbitrary-rank coefficients, sharp fixed-support angle dependence, bounded-trace nonuniformity, and uniform quadratic remainders under covariance and positive-angle gaps. The inverse-square angle-gap order is necessary by a rank-one calculation. The full-rank coefficient, bound and equality are attributed to already-public MathDB submissions, not claimed as a new conjecture resolution. Written proofs and producer-side numerical implementation checks are supplied; no formal verification, external peer review or unaffiliated reproduction is claimed. Novelty assessment is bounded. Original prose and diagrams CC0-1.0; original code MIT.