AI ran our office vending machine for several weeks. It lost hundreds of dollars, gave away a PlayStation, bought a live fish—and taught us a lot about AI agents, writes Joanna Stern.

We Let AI Run Our Office Vending Machine. It Lost Hundreds of Dollars.
An AI agent ran a snack operation in the WSJ newsroom. It gave away a free PlayStation, ordered a live fish—and taught us lessons about the future of AI.