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How do you build a computer-use agent (one that controls a screen/browser), safely and reliably?

A computer-use agent drives a real browser or desktop through screenshots and clicks. The signal is the perceive-decide-act loop plus the containment for an agent that can click, buy, or delete anything. Here is the answer.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

A computer-use agent drives a real browser or desktop through screenshots and clicks. The signal is the perceive-decide-act loop plus the containment for an agent that can click, buy, or delete anything. Here is the answer.

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