The combination of these node modules may do what we want (coexistant docco/jsdoc comments).
https://npmjs.org/package/dox
Markdown / JSDoc documentation generator in node by tjholowaychuk
https://npmjs.org/package/dox-docco
"Dox parses block style JS comments, while Docco parses single-line comments. In effect, this is Docco for block-style comments"
It would be great to give these a test run and see how much work would be needed to work them into the process.