Defends himself
A hostile mob within a few blocks gets his full attention. He backs away from creepers and runs when he is down to three hearts.
Autopilot · no orders needed
Say "autopilot" and Brobot works down his own list, from empty hands toward a lit house, iron armour and diamonds. Any order from you takes over at once.
The list
Top of the list wins. Brobot 2.0 has a longer list than version 1: shelter, a furnished and lit house, a farm and diamonds are new. Each new step is tested on its own. The full 2.0 list has not had its start-to-finish timed run yet, so the run times below are marked as version 1.
No bed and no armour? He digs three blocks down, seals the hole and waits for sunrise. With a bed nearby or in his bag, he sleeps instead.
Tested: three mobs overhead all night · health 20/20
With nothing to eat and hunger setting in, he hunts a couple of animals, cooks the meat and eats.
Chops a tree by hand, then planks, sticks, a crafting table and the pickaxe.
Version 1 run: done 18 seconds in
Mines cobblestone and upgrades: stone pickaxe, sword and axe.
Version 1 run: done 1.5 minutes in
If he has no place called home, he chops about forty logs, builds the house and saves it as home.
Version 1 run: done 8.2 minutes in · 124 blocks placed
A crafting table, a furnace and a chest go inside. Then torches around the base, so nothing spawns on the doorstep.
New in 2.0
Finds iron ore, mines three, smelts them in his own furnace and crafts the pickaxe.
Version 1 run: done 9.9 minutes in
If there are sheep around he gets three wool and crafts a bed, so nights stop being a problem.
One piece at a time: mine, smelt, craft, put it on.
Tills the soil beside the nearest open water to home, plants it, and harvests whenever the crops are ripe.
New in 2.0
Once he is in armour with an iron pickaxe, he digs a staircase down to diamond level, mines three and walks back up. Then he crafts a diamond pickaxe.
Tested on its own: 3 diamonds and back in 3.5 minutes
Coal, iron, wood and stone in rotation. When his bags are nearly full he walks home and stores everything in a chest.
Always on
These interrupt whatever he is doing, then hand control back to the task.
A hostile mob within a few blocks gets his full attention. He backs away from creepers and runs when he is down to three hearts.
When hunger drops he eats the best food he is carrying.
Low on breath, he surfaces first, breaking a ceiling if he has to.
Walking without getting anywhere for five seconds triggers a wiggle and a new route.
You stay in charge