ok so why the extraneous prefix string then, surely it's fine to just add it to the filter keys? you could even add just one, and make them tags then
I don’t really understand what you’re suggesting. Do you want to provide an example? As a general philosophy - I have very little interest in debating over standards and ultimately just want to adopt whatever wins out in clients. Our main long term goal continues to be interoperability as a relay provider. For now I wanted a way to access results similar to this API https://docs.nostr.wine/api/classification from within the relay. It’s not documented intentionally as it’s subject to change.