# Computers

Use a desktop when the task depends on visual applications, browser state or direct interaction.

## When a desktop helps

Some tasks are naturally expressed through files and commands. Others require a visual browser, a native application or a screen that a person and agent can inspect together. Choose a computer for that second group.

## Make readiness observable

A machine can be running while its desktop or application is still starting. Check the surface the task actually needs, and keep the session attached to the correct computer identifier.

## Separate viewing from control

A live viewer shows what is happening. Input control changes the machine. A product should make that distinction clear, especially when a person and an agent share a session.

## Choose the smallest useful surface

Use a [sandbox](/docs/sandboxes) for code execution alone. Use a computer when a desktop is part of the task. Store important output in a persistent resource before ending the session.