ReadonlyaccountReadonlycapabilitiesReadonlycredentialthe credential this plane spends against, so a hub can share one budget across planes
ReadonlyhttpReadonlykindReadonlynamespacewhat this plane is, for an error message: an account id, a namespace, an endpoint
the deployed modules, where the plane can return them
Refuses past the cap rather than letting the API drop the overflow quietly.
The operations every executor has.
Anything a particular executor cannot do is absent from here and reached through a capability instead, so this interface stays the set of things that work everywhere.