Wanted a way to navigate between different projects using only zsh. Feedback welcome

project_switcher.zsh

setopt extendedglob
unset CURRENT_PROJECT_NAME
typeset -a project_dirs
find "${HOME}/projects" -maxdepth 1 -type d | while read project; do
  project_dirs+=("${project:t}")
done

function proj() {
  name=$1
  base=${2-projects}
  proj_path="${HOME}/${base}/${name}"
  export ORIG_PROMPT=${ORIG_PROMPT-$PROMPT}
  if [[ -n $CURRENT_PROJECT_NAME && $CURRENT_PROJECT_NAME == "${name}" ]]; then
    return
  elif [[ -z $name || ! -d ${proj_path} ]]; then
    echo "Invalid project: \`${base}/${name}'" >&2
    echo 'Usage proj PROJECT' >&2
    export PROMPT=$ORIG_PROMPT
    unset CURRENT_PROJECT_NAME
    return 69
  elif [[ -n $CURRENT_PROJECT_NAME ]]; then
    echo "Changing project from ${CURRENT_PROJECT_NAME} to ${name}"
  fi
  export PROMPT="${MAGENTA}( ${YELLOW}${(C)base}::${(C)name} ${MAGENTA}) ${ORIG_PROMPT}"
  pushd "${proj_path}"
  export CURRENT_PROJECT_NAME=${name}
}
compctl -k project_dirs proj