Using /plan-refactor crashes traycer, eating up artifacts. Error says that extension host terminated or something like that. Would be a good idea to implement some sort of artifact refund if the action crashes or doesn't complete.

Thanks for reporting. We are moving to a new upfront monthly credit system (instead of a rate limit) soon, where credits will only ever get subtracted after the artifacts get persisted into the database cc: @rapid-van-6755, @proud-printer-9482