Best practice for cross-namespace event emission from handlers?

[simwai]

Use Case

I have a scenario where a handler in one namespace (/chat) needs to emit an event to a different namespace (/subscription). Specifically:

• User sends a message via /chat namespace
• If they hit their daily limit, I need to emit messageLimitReached to the /subscription namespace (where subscription-related events are handled)

Current Solution

I'm currently passing the io instance as a closure variable to the action factory:

export function createChatSocketActions(
  chatService: ChatService,
  io: Server // <-- Pass io manually
) {
  const sendMessage = chatFactory.build({
    async handler({ client, withRooms }) {
      // ...
      if (userHitLimit) {
        // Cross-namespace emit
        io.of("/subscription")
          .to(`user:${userId}`)
          .emit("messageLimitReached", {});
      }
    },
  });
}

This works, but feels like it might not be the intended pattern.

Question

What's the recommended approach for cross-namespace communication in zod-sockets?

Options I can think of beside my current approach:

1. Add io to handler context - simple but maybe too permissive?
2. Add a helper like emitToNamespace(ns, room, event, data) in the handler context
3. Extend withRooms() to support .toNamespace(ns) or similar

Would love guidance on the "blessed" way to handle this, or if it's worth considering adding official support for cross-namespace operations in the library.

Thanks!