I'm considering adding a "relay-set router" to NDK.

This would give developers the ability of providing certain policies to route both event fetching and publishing to a particular set of relays, overriding the default calculation. It could (or not) include in the information the router receives the selection that NDK has done, including what it wants to do per the outbox model.

I want to use it for an application that I'm making that creates certain kind of special events and with this I could create a router that says:

"whenever you fetch/publish kind XXX, send it to only these relays"

"whenever you fetch/publish kind 0, include PurplePages, otherwise don't include PurplePages"

Does anybody find this interesting or useful?