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Without a terminal sudo keys its cached credential on the parent process of each call, so the timestamp validated by sudo -S -v in the test shell never reached omarchy-setup-security-sshd's own sudo calls when omarchy-iso-test drove the suite over ssh with no pty, and the exercise died with 'a terminal is required'. Run it under script(1) and validate the password on that pseudo-terminal first, so every sudo underneath shares the terminal-keyed credential.