Optional ReadonlyagentOptional ReadonlyexpectedIndependently saved head of the requested scope; detects a valid-prefix rollback.
Optional ReadonlyexpectedOptional ReadonlyrequireOptional ReadonlysessionOmit for ALL selected-store events, as required by workspace spill lifecycle operations.
Optional ReadonlyverifyExplicit opt-in: opens event payloads, may require keys, refuses unsupported retention.
Readonlyworkspace
Optional match against the native session/open identity; requires sessionId.