ReadonlycreationThe creation flows in progress, by the flow's id (its camera session): the share sheet's controller and the flows the screens end by value. A flow that closes, publishes or is abandoned deletes its entry.
ReadonlyfilesReadonlysongsThe part of the catalog song the player downloaded for a Reel, by the id of the video it is for: the server's bytes, which the mix at Share reads back. Process state like the files, with the lifetime of the video's file, and a process that lacks them cannot mix.
The files the process's composer holds and its creation flows' own state: process state, one per runtime layer, never in a snapshot, a checkpoint or a trail (the files are megabytes and the developer's own). A pick puts a file here and passes its small descriptor on through the screens' inputs; the publishing action reads the bytes back by the descriptor's id. A process restored from a checkpoint holds no files, so a publication continued from one fails with the typed
PostingMediaNotInProcessErrorinstead of sending anything.