this is pretty awesome! I might try this out on a new project, but just a heads up, the github links are dead. looks like the repo was refactored, so now the links are here:
wiki.js
https://github.com/osmc/website/blob/master/src/assets/js/modules/wiki.js
wiki.php - now a module
https://github.com/osmc/website/tree/master/server/modules/wiki
is it possible to get Sam (or someone from OSMC) to put together a little how-to on using their Wiki code?