INHERITABLE_LABELS = %w[
  type::bug
  type::feature
  type::maintenance
  feature::addition
  security
  performance
  Deliverable
]

def inherited_labels
  gitlab.api
    .merge_request_closes_issues( gitlab.mr_json['project_id'], gitlab.mr_json['iid'])
    .flat_map { |i| i.labels }
    .compact
    .uniq
    .select { |label| INHERITABLE_LABELS.include?(label) }
end

helper.labels_to_add.concat(%w[devops::systems] | inherited_labels)