Multi-device support is progressing well for #HolosSocial. The tricky part: each device runs its own #ActivityPub server, with its own local data, signing its own activities. Keeping several servers in sync both ways, without duplicating everything, without losing actions on the way, and without two of them handling the same activity at the same time, was the main problem to solve. It also had to stay reliable when a device goes offline for hours or days.
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