The options forwarded to the formatter should enable one to make use of the contentSlug option (see https://github.com/voxpelli/node-format-microformat#options):

That should solve juandpinto/node-format-microformat@bf9ad7b#commitcomment-31828341 and allow eg. a post like https://voxpelli.com/social/2018/12/40669/ / https://github.com/voxpelli/voxpelli.github.com/blob/master/_posts/2018-12-16-40669.md to have a content based slug

Ping @juandpinto