You can run a command every time you change directories in zsh with the chpwd function:
export CURRENT_PROJECT_PATH=$HOME/.current-project
function chpwd {
echo $(pwd) >! $CURRENT_PROJECT_PATH
}
current() {
if [[ -f $CURRENT_PROJECT_PATH ]]; then
cd "$(cat $CURRENT_PROJECT_PATH)"
fi
}
current
This will write the current directory to a hidden file in $HOME; opening a new
terminal will automatically cd to that directory.