When I roll back a migrated durable agent, what verification steps confirm that no in-flight executions are still partially persisted in the new state store before I fully decommission the old system?

Query the Catalyst state store for outstanding workflow instances after disabling new invocations, ensuring no partial executions remain before decommissioning. Drain active runs by stopping ingress, then inspect the store with management APIs to list incomplete workflows, and wait for them to finish or safe-terminate. Incomplete workflows with human-in-the-loop steps may require appropriate signaling before termination; verify that task queues are empty. Forced cancellation can risk inconsistent side-effects if steps are not idempotent.