The --cron help string claimed "silent unless error", but cron mode sets
UI.SetQuiet(true), which suppresses only the seven quiet-aware UI methods;
Warningf and Errorf still print. The snapshot terminus deliberately routes
its end-of-run summary through Warningf so cron delivers something on
success, so a user trusting the old text could read normal output as a
failure signal. The string now reads "silent unless warning or error",
matching the README wording corrected in #84. No behavior change.
Model: opus-4-8
sneak