A Connector is what actually runs a coding agent's process on your behalf. Claude is the one connector that's fully built out and verified end to end today.
You can pick a different connector for the whole app, or override it for a single workspace — see Choosing a connector per workspace — from that workspace's own Settings — no need to touch anything else.
A few other connectors exist as an early starting point, not a finished guarantee — see What "scaffolded" means for the newer connectors before you lean on one for something that matters.