@salathe Hello. Thanks for accepting our invitation. Your opinion in this migration will be very important :blush:
So, a little progress report on tooling. It took me a bit longer than I thought it would to re-understand how the manual gets built and in particular how partial manual builds get built.
This repo https://github.com/danack/PHPDocTool will do all the stuff necessary to check out the docs, and PHD then render it locally, and watch for any changes on the file system, at which point it will rebuild just the changes.