The consistency level of the list operation. The default consistency level is "strong". Some use cases can benefit from using a weaker consistency level. For more information on consistency levels, see the documentation for Deno.KvConsistencyLevel.

List operations are performed in batches (in sizes specified by the batchSize option). The consistency level of the list operation is applied to each batch individually. This means that while each batch is guaranteed to be consistent within itself, the entire list operation may not be consistent across batches because a mutation may be applied to a key-value pair between batches, in a batch that has already been returned by the list operation.