zammad/app/frontend/shared/entities/ticket-article/graphql/mutations/changeVisibility.graphql

mutation ticketArticleChangeVisibility($articleId: ID!, $internal: Boolean!) {
  ticketArticleChangeVisibility(articleId: $articleId, internal: $internal) {
    article {
      id
      internal
    }
    errors {
      ...errors
    }
  }
}