Just like writing normal software: have it work on different parts of the codebase that don't have overlap, or do the work sequentially. AI is a time compressor, but it's still constrained by the same problems as normal engineers.
If one task changes the button to green, and the other one changes it to red at the same time, something will have to decide how to reconcile that difference
If one task changes the button to green, and the other one changes it to red at the same time, something will have to decide how to reconcile that difference