start

where the handler's subscription starts in a partition it has no checkpoint in yet, which the compiler writes into the Manifest; the host's wow.subscriptions.[<context>.<processor.function>].start overrides it. Start.DEFAULT starts a projection at the Start.BEGINNING; a reactor or a saga of its own context's stream at the Start.END, so deploying it does not act on the history again; a reactor's or a saga's handler of another context's stream where its service joins the stream: at the Start.BEGINNING when no other subscription of the service reads it yet, so a service that joins later still gets what was published before, else at the Start.END, so a handler added later does not act on it again. A subscription that has a checkpoint goes on from it, whatever this says.