Yeah, filters can also be just for. This works purely before invocation, while with a filter you can also catch errors and act, so slightly different options to achieve similar results. One advantage of the service selector is that you can define the settings (temp etc) for each one specifically!

Sure! github.com/eavanvalkenb... look at the service selector code!

Yes you can! You can even fail over based on conditions, I built a demo that can go fully offline while keeping the same chat going with rag! (Ollama + qdrant for offline, openai + azure ai search when online)!