Clarification Needed: virsh snapshot-delete Behavior with External Snapshots (--disk-only)

Hello libvirt community, I am seeking clarification on the behavior of `virsh snapshot-delete` when used with external snapshots (created with the `--disk-only` option). **Environment:** - libvirt version: 10.5.0 - Kernel version: 5.14.0-503.22.1.el9_5.x86_64 - Disk image format: qcow2 - Host OS: RHEL 9.5 **Steps to reproduce:** 1. Create an external snapshot:          virsh snapshot-create-as --domain <vm> --name snap1 --disk-only --atomic 2. Delete the snapshot:          virsh snapshot-delete <vm> --snapshotname snap1 **Observed behavior:** - Changes from the overlay (snapshot) file are merged into the base image. - The snapshot metadata is removed from libvirt. - The snapshot file remains on disk (appears orphaned). **Questions:** - Is the observed automatic merge of the overlay file into the base image during `snapshot-delete` the intended behavior for external snapshots in recent libvirt versions? Or we need separate `blockcommit` step. - Should the snapshot file be deleted automatically, or is manual cleanup required? - Is there any official documentation that clarifies this behavior for external snapshots, as most documentation seems to focus on internal snapshots? Thank you for your help and clarification! Best regards, Raj.