The Sony Xperia Z3 (D66XX) and Xperia Z3 Compact (D58XX) have received ClockworkMod-based Recovery and Root just in time for the release of both handsets. The Touch Recovery is built from CWM 184.108.40.206 sources. XDA legend DooMLoRD has posted all of the details in the source links below, including instructions and download links.
The main requirement to install this CWM-based Recovery is to have an unlocked bootloader. You need to be on stock firmware – this means build number 23.0.A.2.93 for the Xperia Z3 and firmware version 23.0.A.2.105 for the Xperia Z3 Compact. The only known issue is that adb is not working in Recovery. DooMLoRD has also posted instructions on how to root the handset, which requires you to flash the kernel from the source link.
Xperia Z3 Recovery and Root
Xperia Z3 Compact Recovery