plane/apps/app/components/lexical/plugins/code-highlight.tsx

import { useEffect } from "react";
import { registerCodeHighlighting } from "@lexical/code";
import { useLexicalComposerContext } from "@lexical/react/LexicalComposerContext";

export const CodeHighlightPlugin = () => {
  const [editor] = useLexicalComposerContext();
  useEffect(() => {
    return registerCodeHighlighting(editor);
  }, [editor]);
  return null;
};