Cyanogen 12 update for OnePlus One stopped to add one feature
The feature that Pei is alluding to is the one that allows users to say the phrase "O.K. OnePlus" to activate certain capabilities of the OnePlus One. It is similar to the feature that allows Android users to activate a Google Search by saying "O.K. Google."
According to Pei, the Cyanogen 12 update will resume in the middle of this week. The latest version of Cyanogen is based on Android 5.0 and includes the ROM provider's email client Boxer.
source: @getpeid via AndroidCentral