Computer-using agents are programs that follow instructions by operating software, like clicking and typing. Checking whether they really finished a task is hard: the screen may look right while a file was never saved. Older checks either look at a few screen images or run a script, and both can miss decisive evidence.
VeriCUA is a new way to verify. After an agent tries a task, the verifier explores the available context, builds a checklist of what would count as done, then chooses interface checks or code-level checks, such as reading files or databases, to test each item. It combines findings using explicit rules.
In tests, VeriCUA agreed with human reference labels more often than baseline methods and rejected more false completion claims. That matters because dependable is what lets developers build better agents from examples and feedback.