Servants that order your stuff

Servants can work as Factorio's drones, ordering stuff for you.
Something like:
- You can set up chests as "input". Servants will pick up stuff from here.
- You can set up chests as "output". Output chests allow to reserve slots for certain items, so only that item can be put in that slot.
When not busy, servants will drop their non equipped items into output chests.