What happened?

Hello... I'm trying to implement an A2A server/client but the behavior around message/stream and task/resubscribe isn't completely clear.

Suppose a client starts a task by calling message/stream but disconnects before it finishes:

1. When the client reconnects through task/resubscribe, we don't see the spec defining how to specify which was the last received message. If the server to replay the entire thing always?
2. Now suppose that in between the client disconnecting and resubscribing, the same (or another client) calls message/stream with the same taskId, adding a new message to that task. Are all subscribers expected to get responses from all messages? Or differently put, is the datasource behind task/resubscribe expected to behave as a queue or as topic?

Thanks

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