app.cosmosis.supercluster

A derived grouping of accounts defined as a set expression (union / intersection / difference) over Clusters and/or other Superclusters. No members are stored directly; membership is evaluated at query time by resolving the expression tree. Superclusters are always permissioned: each lives inside its own dedicated Space of type `app.cosmosis.superclusterSpace`, with the Space `skey` and record `rkey` sharing the same tid. (Every leaf of an expression is ultimately a Cluster, and Clusters are always permissioned, so a public Supercluster could not be resolved by third parties.) To resolve a Supercluster, the reader must have access to the Space of every Cluster and Supercluster it references, directly or transitively.