The Oak is now supported by the Particle Build IDE!
Please note that there are very few Oak specific libraries are available for use, and you may have difficulty including Particle-provided libraries. Please submit/request more Oak specific or Oak compatible libraries via the Particle IDE Libraries tab.
If you are using a new Oak that has never received its initial update you must complete this tutorial first: Connecting your Oak for the first time
Go to https://build.particle.io
Login using the Particle.io user name and password you setup when you registered your Oak.
Select the Oak you'd like to program from the devices tab within the Particle IDE.