A few hours after the release, TheFlow has fixed a few annoying bugs (doubletap bug + Adrenaline menu after enabling/disabling wifi), but, more importantly, he made Adrenaline open source. He also released version 3.1 today, while announcing he was taking a break from the scene.
Adrenaline is probably the most complete ePSP CFW to be open sourced. PSP Custom Firmwares do not emerge out of thin air nowadays, and parts of them are the result of reverse engineering of past CFW code: people familiar with past PSP Custom Firwmares such as M33 or Pro CFW will recognize familiar folder names and structures in the cef folder. But it would be interesting to see how much could be added to Adrenaline from projects such as ARK, or the recently open sourced M33, the grandfather of all ePSP Custom Firmware.
Download Adrenaline source (developers)
You can get the Adrenaline v3 source code from the developer’s github here. Please check the readme for details and a link to donate to TheFlow for his continuous work for the Vita scene.