Data and Repro Pack for "A testable brane-world unification: one parameter links a GW spectral break and ΔN_eff" (Maldonado, 2025)

Machine-readable files sufficient to reproduce the figures and key checks in Maldonado (2025). Contents:• LISA sensitivity curves in CSV with ESA-style headers: f_Hz (Hz), Sn_1_per_Hz (one-sided strain noise PSD in 1/Hz), label (string). Variants: 4-yr instrument-only, 4-yr +confusion, 10-yr instrument-only, 10-yr +confusion.• PTA spectrum CSV used to anchor the broken-power-law fit: columns = freq_Hz, log10rho_median, log10rho_p16, log10rho_p84.• Results Two-Pager PDF: equations, PTA fit preview, LISA overlays (reader-friendly).• Best-fit parameters with 68% intervals (JSON).• README with instructions; optional reproduction script to regenerate plots. Purpose:To enable independent inspection and regeneration of (i) the SGWB broken-power-law shape and break frequency f_br(λ) ∝ λ^(1/4), and (ii) the mapping of the dark-radiation constant C to ΔN_eff via C / ρ_γ,0 = (7/8) * (4/11)^(4/3) * ΔN_eff.This dataset is complementary to the associated manuscript and is intended for peer review and reuse.