Hi Mrb0y,
The
spark/flash/status : failed message on the Particle logs is a known bug on the Particle end with all of their devices using FastOTA programming. It seems to always fail on the log when it is successful, and is successful when it fails. The more important messages is the one from the Arduino IDE - if it says it was successful, then all should be good in Oak-land!

If you mean you are trying to use the Particle Build IDE, then that is not supported yet. It should be too long now... there was a test version of the compile code needed for their end being tested a few weeks ago, but things seem quiet on that front just at the moment.
Pete