Yeah this plugin is probably not the right tool for that. The bot is powered by your Discourse and can access your Discourse data (where permitted and prompted by command) but runs in a separate thread so will not be signalled by Discourse events.
I guess it might be feasible to extend it at some point to eg watch for a new Topics within a specific category. Not the best use of this architecture but PR welcome.
Sounds like you need to investigate?:
Or