It looks like it's a yes and no as far as working. He got particle upload working, but he b0rked the Oak in the process as he flashed it with an ESP8266 core instead of a Oak Core and it wasn't happy!

Unless it is possible to identify where Erik originally branched off the ESP8266 core, so we can identify the unique Oak/Particle stuff, and then hopefully transplant that into the current core, it probably won't happen. However, with his recent post about wanting to provide a non-particle solution that can be completely managed, moving back to the native ESP8266 core will become very easy, and then it's just a mater of working out how to provide the OTA upload stuff through PlatformIO. So really it's a watch this space game at the moment, as things are changing, so there really isn't any point working on a migration.