Variable BRANDConst

Symbol brands for the cycle-forced base types only — those an instanceof value-import can't reach without forming a module cycle. Item/actor kinds are not here: they are matched by their serializable .kind discriminant in isA (no cycle, and a Symbol would buy only un-spoofability, which is meaningless for a kind). Module-scoped Symbol(), never an own/serialized property when attached via an inherited getter.