John Wu, May 15
An update to future Magisk releases: the "Canary" channel will start shipping release builds, and a new "Debug" channel will be shipping debug builds. Both channels will be updated at the same time from the same source code, the only difference is the build flag.
Debug builds should only be used if you are actively developing Magisk, or if you want to submit bug reports. An upcoming change will start enforcing APK signature verifications on release builds to combat fraudulent/modded/hacked Magisk app APKs.
We also plan to start adding symbols (and maybe some sanitizers) and enabling core dumps on debug executables for better debugging and auditing. All these changes can be an issue on older device, and could significant effect performance, which is why it should not be used daily.
John Wu, May 24 (8h)
I just pushed out a new Canary build that enforces Magisk app signature verification directly in the root daemon. I have also updated the README on GitHub with guidance for developers working on Magisk itself and distributing your own builds signed with your own keys.