On 2020-10-28 13:28, John Rouillard wrote:
> Hmm, do any of the engines allow us to set rel="nofollow" and or 
> rel="nofollow noopener" on the links?

markdown2 has https://github.com/trentm/python-markdown2/wiki/nofollow
markdown does not seem to have such option
mistune does not seem to have neither

Any way, I think this is out of the scope of this issue as it is already
possible to make roundup render a link in markdown using the proper
syntax.