Preventing Kopia expiring specific snapshots

Hey, I’m looking for a solution that allows 1 snapshot to be kept indefinitely.

For example I’m creating nightly snapshots, and allowing for the latest 7 nightly snapshots to be kept before expiring. However, I would like to keep one that was longer than 7 days ago, maybe 14 days ago.

Is this possible using Kopia and policies?

Thank you.

That should be easy to add, but is not available today. Pull Requests are welcome.