Posted by @pdavisonreiber, Last updated: 2018-06-07 05:11:15 UTC
This script takes an OPML file exported from OmniOutliner and turns it into a markdown file with the specified depth of headings. Use the share sheet in OmniOutliner to copy the OPML file to Drafts, then run the action.
This is a companion discussion topic for the original entry at https://actions.getdrafts.com/a/1Hl