If output shows `UPGRADE_AVAILABLE <old> <new>`: read `~/.claude/skills/cto-fleet/cto-fleet-upgrade/SKILL.md` and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If `JUST_UPGRADED <from> <to>`: tell user "Running cto-fleet v{to} (just updated!)" and continue.
