How can I strictly enable CodeBlockLowlight?

[spencerjsmall]

Hey! Does anyone know how I can configure the editor to only contain an unremovable CodeBlockLowlight node? In other words, I really only want to use the editor as a code editor, and not allow 1) the code block to be removed and 2) the ability to navigate outside of the code block (using arrow keys or double enter). Is this possible? Do I need to change the Document schema, or (god forbid) listen to keyboard events? Here's my current (Vue) editor configuration:

const editor = useEditor({
  extensions: [
    Document,
    Paragraph,
    Text,
    VariableNode,
    CodeBlockLowlight.extend({
      content: 'inline* text* variable*',
      addNodeView() {
        return VueNodeViewRenderer(LanguagePicker);
      },
    }).configure({ lowlight }),
  ],
  editable: true,
  onUpdate: ({ editor }) => {
    modelValue.value = {
      content: editor.getText(),
      language: editor.getAttributes('codeBlock').language,
    };
  },
});

Thanks so much!

[spencerjsmall]

As suspected, solution was as easy as restricting the document schema to the codeBlock:

Document.extend({
      content: 'codeBlock',
    }),