ADB Root Enabler

What it changes

The module has no scripts. It's a single system.prop that Magisk applies at boot:

ro.debuggable=0            # 1 in the debugable variant
ro.adb.secure=0
persist.service.adb.enable=1
persist.service.debuggable=0   # 1 in the debugable variant
persist.sys.usb.config=mtp,adb
service.adb.tcp.port=33445     # 5555 in the two -5555 variants

• ro.adb.secure=0 turns off ADB's RSA key check, so no authorization prompt appears.
• persist.sys.usb.config=mtp,adb keeps USB in file transfer (MTP) plus ADB mode.
• service.adb.tcp.port makes adbd listen on the network as well, so you can connect over Wi-Fi (added in v1.3 by xweiba).
• ro.debuggable=1, only in the debugable variant, marks the build as debuggable. adbd needs that before adb root will restart it as root; with the other two you get a normal shell and use su.

Which zip to pick

Port 5555 is the one adb connect assumes by default. Install only one variant; they share the module ID Adb-Root-Enabler, so a new one replaces the old.

Installation

1. Install the zip from the Modules screen in Magisk, or flash it in TWRP. The installer uses Magisk's own installer functions, so Magisk v20.4 or newer has to be on the phone either way.
2. Reboot.
3. Connect over USB with adb devices, or over the network with adb connect <phone-ip>:5555 (or :33445 for the default zip).
4. On the debugable variant, adb root restarts adbd as root. On the others, run adb shell and then su.

To undo it, remove the module in Magisk and reboot. Version 1.2, the older release, came in adb-only, mtp and rndis USB variants and has no network port.