Interface ResolveBatchItemParams

Claim-lock assertion inside the same guarded UPDATE. Batch fills are claim-agnostic without it (multiple contributors are the norm). See ResolveEscalationParams.assertClaim.

Row selector — exactly one of id | signalKey.

The declared batch key this submission fills.

Merge patch applied to the row's GIN-indexed metadata in the same atomic UPDATE. See ResolveEscalationParams.metadata.

The item's payload — stored under envelope.batch_items[itemKey] and, on completion, delivered as collection[itemKey] to the waiter.

Resolver identity. Delivered under $resolution ONLY on the completing item's signal. See ResolveEscalationParams.resolvedBy.

Row selector — the value passed to condition().