I have an Ur-bot Pilot in one my crews and we it looked something like this when we were all said and done:

Here are some things you might expect an Ur-bot to do:

0 Stress: Eschew breathing and eating. Have immunity to diseases.

1 Stress: Detect nearby Ur-bots. Access and/or hack a machine by hooking directly up to it. Gain potency whenever you Attune to other artifacts. Briefly contact any Ur-bot within the system.

2 Stress: Use your machine nature to process information faster than organic minds. Survive in space unharmed for an extended period of time.