SDK: add Ask (read-only) mode alongside agent and plan

[Colin]

Hey @Lade!

In general, modes are a little bit in flux right now and probably deserve some alignment. Thanks for the SDK-specific feedback!

Ask mode in cloud agents

Hey @i.rpsv! Thanks for sharing those bc IDs. I’ve passed them along to the team working on Grok to see if we can improve the behavior here! I’ve also sent your feedback on Ask Mode over to the Mobile team. Today, modes are a little inconsistent for Cloud Agents (they exist in the Agents Window, but not on the web, and only Plan/Agent mode is available in the iOS app). There’s definitely some work we could do here to be more consistent.