CDN-241 · The Residual Decomposition — GCFT Dark-Sector Book Arc (Art Edition)

CDN-241 decomposes the dark-sector residual across 25 galaxy clusters into {P, F, S, E} taxonomy components using the CDN-240 validated dual register. The mass-weighted residual budget is S: 55.2%, F: 28.2%, P: 16.7%, E: 0.0%. The mean dark-sector closure fraction is 96.6%; the mass-weighted mean residual is 0.112 M̄, accounting for only 1.9% of ξ_target. The κ-gradient maps a monotonic decrease from κ̂ ≈ 0.99 at λ < 15 to κ̂ ≈ 0.79 at λ > 21, confirming that coherence ordering strengthens with environmental richness. Art Edition with star-field design system (seed 241). Lock: CDN241_RESIDUAL_DECOMPOSITION_LOCKED.