The Sagittarius Stream traces a near-polar wrapping orbit around the Milky Way and appears dynamically linked to the observed warp, waves, and corrugations in the Galactic disk (Ibata 2001; Ruiz-Lara 2020; Law & Majewski 2010; Deg & Widrow 2013). Fitting the full 3D track + bifurcation while simultaneously reproducing the Milky Way warp within a triaxial CDM halo is difficult: halo shapes that match the stream often misalign the disk or underpredict warp amplitude.
The standard model attributes the Sagittarius Stream to gradual tidal disruption of the Sgr dwarf in a triaxial CDM halo. Recovering the stream's bifurcation, precession, and disk-perturbation signatures simultaneously demands fine-tuned halo shapes that are mutually inconsistent across the Milky Way's stream population.
SCT replaces the hot-dense-center with a superluminal collision and the thermalized debris field. From this single change, the Sagittarius Stream warp is a gravitational-superposition + sibling-pocket signature where the stream-orbit evolution is shaped by Φ_eff = Φ_local + Φ_mesh (P50, P51) rather than by a CDM-particle-halo with specific triaxial shape. Sgr inherits its J from the Milky Way's parent cascade-stream event (P22, P25, P31, P32) just like the other halo streams.
The Sgr Stream's bifurcation reflects cascade-debris substructure inherited at deposition (multiple cascade-stage products combining within the same parent J context), not late-time tidal-interaction artifacts. Per Paper 13 prediction P19, the cumulative azimuthal offset between SCT and ΛCDM after four Sgr stream wraps is roughly 24 to 120 degrees, distinguishable in DESI Year 3 BHB-and-K-giant tracking. The Milky Way disk warp comes from the same coherent Φ_mesh contribution acting on the disk that produces the Sgr orbital perturbation, naturally tying the two phenomena.
Sibling pockets (P58, P59, P60) add gigaparsec-scale gravitational influence that contributes to the long-term orbital precession. The same M3 framework that produces the Monoceros Ring (recid 129), the Aquila Field (recid 135), GD-1 + Pal 5 streams (recid 136), and the Orphan Stream (recid 137) places the Sagittarius Stream + warp in the unified Milky Way halo cascade-debris census. There is no need for fine-tuned triaxial-halo shapes that conflict between streams.
If precision DESI Year 3 BHB-K-giant Sgr stream tracking finds the stream's orbital precession fully consistent with ΛCDM triaxial-halo predictions at the 5% level (no 24 to 120 degree azimuthal offset signature), the M3 + M6 cascade-debris explanation is refuted. The signature SCT prediction is the cumulative azimuthal offset from cascade-J inheritance plus Φ_mesh contribution.