Quick access to frames in casts could be powerful:

@dwr.eth -> user
/dwr -> channel
$eth -> assets
+frame -> frame?

Other related idea is while $ works for tokens, there's not a great generic contract address standard. Frames paired to contract addresses as a default UI could be interesting.

::bracket
::farcade
::opensea

(^ this figure reminds me of the icon for Frames in tool bar, which I love btw cc @blockheim . Also the above things feel like they have movement in them somehow)

In any case *killer* idea.

I notice all those other tags can be assumed to be unique-ish. Some way to do same for frames?