Cluster major axes align over 200 to 300 Mpc where simulations reach 30, BCGs align with their clusters at one-in-a-million significance, and the architecture is fully in place at z above 1.3, four gigayears after the Big Bang, with no schedule left for tidal assembly (Binggeli 1982; West 2017). The orientations look like memory, not evolution.
Orientations in the model are assembled: anisotropic accretion and tidal torques slowly turn structures toward their filaments, with coherence dying beyond a few tens of megaparsecs and strengthening over time. Alignment that is early, deep, and ten times too long-ranged inverts all three expectations at once.
SCT sets the orientations at the start. Structures condensing from the debris field inherit the deposited J = μ(b × v_rel) (P31, P32), and orientation is geometry's twin to rotation: cluster shapes elongate with the shared collision-frame geometry across the full extent of the deposit, which is why the coherence scale tracks the deposited structure rather than the reach of tidal coupling. Alignment at z above 1.3 is then not early; it is original, the boundary condition itself, and subsequent mergers degrade rather than build it, exactly the registered direction: alignment should strengthen monotonically with redshift, with cluster ellipticity following the matched evolution e near 0.33 + 0.05z.
The BCG link is the same statement read inward: the central galaxy and its cluster condensed from the same locally-shared geometry, so their axes agree from birth, fully formed at whatever redshift you catch them, the registered one-in-a-million Smith alignment carried as initial condition. The formalism, the shared-collision J-vector imprinting, is in Paper 6, From Chaos to Cosmic Collisions, Section 4, with the hierarchy-wide inheritance in Paper 5, From Chaos To Corotating Hierarchies; the same architecture carries the satellite planes (recid 130), the quasar axes (recid 162), and the clustering anisotropy (recid 66).
Keystone economy: P31 sets the axes once, P32 lets time only blur them. The alignment is not a mechanism's achievement; it is a memory's persistence.
The registered kills run with redshift: CMB-S4-era cluster catalogs at z above 1.5 finding alignment amplitude decreasing with redshift, the gradual-assembly signature, or ellipticity evolution inconsistent with e near 0.33 + 0.05z at high significance, would refute the boundary-condition reading. Equally, JWST cluster imaging at z above 2 finding the BCG-cluster alignment absent or substantially weaker than at z of 0 would restore tidal assembly and remove the initial-condition account.