If you want to run only once a specific task during all playbook execution, you may add "run_once: true" option into your task to do this.
e.g. example task
- name: prompt for directory name
run_once: true
pause:
prompt: "Please enter directory name: "
register: input_dir_name
- name: show input
debug:
msg="{{ input_dir_name.user_input }}"
