Phabricator had allowed for specifying dot notation in their markdown (remarkup) which would use graphviz to render the images in the comment. I loved this feature but it was removed due to potential exploits [0]. Is anyone familiar with how graphiviz-as-a-service could be possible while addressing these concerns?
[0] https://hackerone.com/reports/88395, https://secure.phabricator.com/T9408