ReadonlyauthorizationOptional ReadonlyboundsExtent the caller is asking about. Must equal the region's own extent.
Optional ReadonlyexpectVersions the caller expects. A drift fails closed instead of serving stale schema.
ReadonlymanifestOptional ReadonlynowOptional ReadonlyonObserve every tile served, for diagnostics. Exceptions are ignored.
Optional ReadonlyqueryProtocol-neutral query the snapshot was planned with. Every resource of a snapshot is identified against its selection's canonical query, so a tile or document planned under a query must be read back under the same one.
Optional ReadonlystaleReadonlystore
The caller's current authorization-scope partition input. Its digest must equal the region's, so a scope change can never serve another principal's cached bytes.