Orb-relaxed Nd8 Fe88 Co4 B8 boride candidate. CIF SHA256 5fb5cdc65acb667b6995be9d465382088f126ccc60800fb12526c6ea6d263a18. Unconstrained variable-cell ML relaxation; no DFT. Ouro same-formula novelty, hull stability and magnetic performance remain under review; cross-composition framework novelty is separate. GPAC-authored Co/Ti substitution on a previously generated Nd/Sm directional boron-pair-vacancy support. The computational Y2Fe23B3 archive is the attributed ancestor; the vacancy support and this alloy are not published experimental structures. This is a chemical-order hypothesis, not a claim of an additional framework family. Chemistry exploration of the existing authored Nd2Fe23B3-type directional B-pair-vacancy support. The source is a primary-author computational Y2Fe23B3 archive, not experimental Nd/Sm coordinates. The prior 108-site Nd8Fe92B8/Sm8Fe92B8 hypotheses retain the cubic parent metal scaffold while removing z-directed B pairs; these new R8Fe88X4B8 variants preserve that occupied support and replace one complete four-site Fe orbit by Co or Ti. One candidate framework family, eight fillings/orderings; no new-family credit or parent-property transfer. Source: https://doi.org/10.1103/PhysRevB.70.144107