accessing .ansible.cfg variables in jinja2 templates I don't understand why ansible_managed works and hostfile doesn't.

.ansible.cfg

hostfile         = /etc/ansible/hosts
ansible_managed = Ansible managed: {file} modified on %Y-%m-%d %H:%M:%S by {uid} on {host}

play.yml

---

 - hosts: all
   tasks:
    
     - name: Try and template templ.j2
       local_action: template src=templ.j2 dest=files/output

templ.j2

# This templates out to a handy message
{{ ansible_managed }}
# This causes [localhost] => {'msg': "One or more undefined variables: 'hostfile' is undefined", 'failed': True}
{{ hostfile }}