ORIENT/plugins/zen/robots/models/settings/fields.yaml

fields:
    content:
        label: 'robots.txt'
        oc.commentPosition: ''
        size: large
        language: plain_text
        span: full
        type: codeeditor
        default: "User-agent: *\nAllow: /\nHost: $domain\nSitemap: $domain/sitemap.xml"