The joint interface keeps all 51 columns and rejects source mixing

All 36 software controls pass, with 126 observed LP proposals and 252 exact support certificates. Twelve known-answer systems check axes, centres and noise; nine more exercise every new force-matrix error column. Fifteen negative controls reject mismatched provenance, time, domain or reference, mixed training sources and attempted future receiver input before optimization.

The same 24-coordinate common-error vector spans training and prediction. All 27 physical directions remain, including columns that are zero or weak in a supplied control. Prediction accepts no future receiver observation.

This qualifies the provided-bound mathematical interface, not aircraft error distributions or observational coverage. No native integrations, original aircraft reads or observed fits were used. The next study applies the qualified native and interface components to the complete six-case/eight-sector generated prediction comparison under the unchanged physical bounds.

Qualification evidence · Frozen scope · Native controls · Roadmap.