Markdown content output should not be indexed by traditional search engines. It is a duplicate of the HTML output and would entail a penalty from the search engines.
To indicate to traditional search engines that the Markdown version of the content should not be indexed, output a X-Robots-Tag: noindex HTTP header with the 200 response. See https://developers.google.com/search/docs/crawling-indexing/block-indexi...
none
none
none
Note that Drupal already outputs a canonical URL with the HTML output, and Markdownify outputs a rel alternate header with the HTML when it is enabled, which in theory should suffice. But better be sure...
Active
1.0
Code
Not all content is available!
It's likely this issue predates Contrib.social: some issue and comment data are missing.