Coordinates with: C.26.2 when coordinated work evidences a non-exportable distributed state; C.26.3 when the boundary interaction changes a viability envelope.
Carries: a worked use slice inside C.26.1:4.3, not a standalone pattern or relation token.
Does not mint: U.Probe, a new boundary kind, or reusable relation predicates.
Name posture: Probe-Coupled Boundary Interaction names this boundary-interaction use, not a reusable relation token. Relation meaning is settled under its direct pattern; A.6.P repairs ambiguity, and F.18 handles any needed reusable name.