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How to run unattended computer use on a disposable VM or CI machine with Lcu

Set LCU approval to auto on a sandbox machine so the agent can run without a person at the keyboard.

Authorization notice. Lcu is dual-use. Only use it on software, sites and systems you own or have explicit permission to test.

Remote script. Setup runs a downloaded installer and unattended approval lets the agent act without a person present, so use it only on disposable machines.

Who it is forA DevOps engineer or tester who runs agent-driven GUI checks on a VM or CI runner where no one can answer approval prompts.

The problemInteractive approval prompts block unattended jobs, so GUI test runs stall when no one is present.

The outcomeThe agent runs GUI steps on the disposable machine without prompts, and per-app approval still applies to every app it touches.

What you need first

  • The official ChatGPT desktop app installed locally
  • Your agent harness installed (Claude Code, Codex CLI, Pi, or another supported adapter)
  • macOS on Apple Silicon, or Linux ARM64 or x86-64 with an active X11 desktop and D-Bus
  • Accessibility and screen-recording permissions on macOS, approved during first use

Steps

  1. Install the official ChatGPT desktop app and your harness on the disposable VM or runner.
  2. Run ~/.local/share/lcu/current/bin/lcu setup --approval auto. (inferred, check the README)
  3. Run lcu apps to confirm which apps are always allowed on this machine.
  4. Run the agent job, then review the results and any screenshots it saved.
  5. Run lcu cross-turn off if you turned on cross-turn computer use for this job.

Prompt for your agent

Using the amontlabs/lcu repo, configure LCU for unattended use on this disposable machine with `lcu setup --approval auto`. Run `lcu apps` and report the list of always-allowed apps. Verify that the list contains only apps the job needs.

Caveat. The auto approval mode only pre-allows LCU's two model tools in the harness, and per-app approval stays in force.

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