A.15.4:2 - Problem - Cluster Boundary
A.15 remains the kernel for separating an acting System, exact local system-role kind, classification judgment, direct U.SystemRoleAssignment species, U.Method, U.MethodDescription, U.WorkPlan, and dated U.Work. A.15.4 starts only when a reliance appearance begins to justify a work or reliance claim and the team still needs to recover the required relation or result, its project-side reference, and the rule or test that applies. If those are already known, use them directly; A.15.4 adds no enduring relation around them.