Not properly yet. The per-group coordinator is interesting, it takes on exactly the ordering problem Marmot leaves to relays. Staircase I only know as an app that opens Cordn links. Worth a sheet?
Yes. Staircase by cloudfodder. Cordn by the Cordn devs (there are a few of them). They are both on the same protocol. I can invite you to some groups if you want to test it.
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