a minimalistic prezto prompt theme. Keep it in .zprezto/modules/prompt/functions

prompt_krao_setup

function prompt_krao_precmd {
  vcs_info
}
function prompt_krao_setup {
  autoload -Uz vcs_info
  add-zsh-hook precmd prompt_krao_precmd

  zstyle ':vcs_info:*' enable git
  zstyle ':vcs_info:*' check-for-changes true
  zstyle ':vcs_info:*' unstagedstr '!'
  zstyle ':vcs_info:*' stagedstr '+'
  zstyle ':vcs_info:*' actionformats "%S" "%r|%s|%b %u%c (%a)"
  zstyle ':vcs_info:*' formats "%S" "%r|%s|%b %u%c"
  zstyle ':vcs_info:*' nvcsformats "%~" ""


  # Define prompts.
  PROMPT="%% "
  RPROMPT="%F{cyan}"'${vcs_info_msg_1_}'"%f"
}

prompt_krao_setup