B.1.2:4.3 - Make Interface Choices About Exact Crossing Relations

When the aggregate exposes, namespaces, internalizes, excludes, or leaves a crossing with its subject pattern, make that choice about one exact crossing-relation occurrence and one named use. These words are ordinary decision options, not a closed FPF enumeration and not another relation kind.

Name the direct world facts, affected endpoints, exact crossing predicate and occurrence, preserved obligation or information, evidence if relied on, and the C.11 ChoiceResult or C.32.PAD ArchitectureDecisionRelation@Project that chooses among the ordinary interface options when its exact predicate applies. A different choice passes only after its exact subject assertion, predicate, and result are named; otherwise stop with the established missing-governor blocker, whose content identifies the absent exact predicate source. If a later use must inspect the choice, identify a separate C.2.1 episteme whose claim content describes it and cites that direct result; the episteme does not make the crossing, parthood, compatibility, or decision fact obtain. This preserves interface accountability without an omnibus compatibility-check object. Without that account, an apparent simplification can silently drop an external obligation or proliferate unmanaged endpoints.