This is a great read of it, and honestly we probably did undersell that part.
The handoff works through checkpoints. The deterministic workflow defines the state it expects before resuming, and the agent’s recovery job is to get the UI back into one of those known states, not just “fix whatever happened” and keep going.
If it can reconcile back to a checkpoint, the script resumes deterministically from there. If it can’t, the run pauses rather than pretending it knows where it is.
That reconciliation layer is definitely where a lot of the hard engineering lives.
The handoff works through checkpoints. The deterministic workflow defines the state it expects before resuming, and the agent’s recovery job is to get the UI back into one of those known states, not just “fix whatever happened” and keep going.
If it can reconcile back to a checkpoint, the script resumes deterministically from there. If it can’t, the run pauses rather than pretending it knows where it is.
That reconciliation layer is definitely where a lot of the hard engineering lives.