Running i3 in a mate session playbook snippet

i3-in-mate-playbook-snippet.yaml

    - name: get gsettings
      shell: gsettings list-recursively
      register: gsettings
      changed_when: false

    - name: set gsettings
      shell: gsettings set {{item.schema}} {{item.key}} {{item.value}}
      when: "'{{item.schema}} {{item.key}} {{item.value}}' not in gsettings.stdout"
      with_items:
        - { schema: 'org.mate.background', key: 'show-desktop-icons', value: 'false' }
        - { schema: 'org.mate.background', key: 'draw-background', value: 'false' }
        - { schema: 'org.mate.media-handling', key: 'automount-open', value: 'false' }
        - { schema: 'org.mate.session', key: 'required-components-list', value: "[\\'windowmanager\\']" }
        - { schema: 'org.mate.session.required-components', key: 'panel', value: "''" }
        - { schema: 'org.mate.session.required-components', key: 'windowmanager', value: "\\'i3\\'" }
        - { schema: 'org.mate.session.required-components', key: 'filemanager', value: "''" }
        - { schema: 'org.mate.screensaver', key: 'idle-activation-enabled', value: 'false' }