smart wallet question

I assume there will be a handful of popular implementations with a long tail of more experimental stuff. 

how much of a challenge will it be for a wallet client to support getting a signer to any one of the implementations and interacting with it? how would the wallet discover the implementation? inspecting onchain state or asking the user? what sorts of differences are there between contracts in terms of doing basic interactions?

Building @warpcast and @farcaster, new dad, like making food