ADB and Fastboot are part of the Android SDK Platform-tools, provided by Google. These command-line tools facilitate communication between an Android device and a computer, enabling a range of actions from debugging applications to flashing firmware.
If your goal is to "repack" or flash modules without a PC or custom recovery, specialized modules like Magic ToolFlash adb fastboot magisk module repack
For modules that modify init or boot-time behavior, you can repack the directly (bypass Magisk’s overlay). ADB and Fastboot are part of the Android