Hey 23095030592,
I don't understand. AutoLibrarian repeatedly resets a villager's profession until it sells the right item, but as far as I know there is no equivalent mechanic for vaults. You can only use each vault once and can't influence which item you are going to get.
Is this suggestion for a hack that cycles through your alt accounts and makes each one open the vault automatically? If so, how do the alts get to the vault (they'll spawn somewhere else)? How do they get keys to open the vault?
Or is it a suggestion for a hack that walks through a trial chamber, finds all the vaults and opens all of them on one account? Where does it get the keys from?
In both cases, it seems unlikely that you'll get through the entire loot table. So you wouldn't be able to keep it running until you get a specific item, as you can do with AutoLibrarian.