Random theme selection repeat limits in oh-my-zsh
oh-my-zsh documents support for ZSH_THEME="random" to select a theme from the themes directory at shell startup. The selection is performed by _oh_my_zsh_random_theme in lib/theme-functions.zsh. The implementation prefers the external shuf command when available and falls back to the shell built-in $RANDOM otherwise. Documentation describes the feature but d