Store the largest _id value from the donor shard's cursor response in the config.localReshardingOperations.recipient.progress_txn_cloner document as the <progress lsid> for that donor shard.

{
    _id: <donor's shard ID>,
    progress: <donor1's progress lsid>,
}

The largest _id value from the donor shard's cursor response should be used with {$match: {_id: {$gt: <progress lsid>}}} to resume. Properties to ensure are being tested:

1. The config.transaction cloner for resharding must not trigger a duplicate key error when resuming.
2. The config.transaction cloner for resharding must not miss a document when resuming.

When the donor shard's cursor is fully exhausted, the config.localReshardingOperations.recipient.progress_txn_cloner document can be updated to store {_id: MaxKey} as an indicator that resuming is no longer necessary.