Um… Please ignore this “tip”. I had discovered a fancy way to convert compiled Scrivener RTF output to Markdown, but it turns out that the best way to get Markdown out of a Scrivener binder (of RTF files) was staring me in the face. Scrivener will compile to perfectly fine Markdown using an option in the Compile menu. I had assumed you had to write in Markdown to get Markdown out of Scrivener. But not so.