Kyubi

Kyubi is a stripped-down, emulator-only build of Magisk. Root for Android emulators (BlueStacks and other x86/x86_64 guests), and nothing you don't need there. It is a rebrand and reduction of the Magisk Delta / Kitsune lineage, kept open under the GPL.

Not affiliated with or endorsed by topjohnwu (Magisk), HuskyDG (Magisk Delta), or the Kitsune Magisk maintainers. Kyubi builds on their GPL-licensed work, see Lineage & credit below.

Site: robthepcguy.github.io/Kyubi · Install it with BlueStacks-Root-GUI

What "stripped-down" means

Kyubi is Magisk with everything an emulator never uses removed, so what ships is smaller, faster to build, and has less surface to go wrong:

• x86 / x86_64 only. No ARM ABIs. Emulator guests are x86; ARM builds were dead weight (the APK is ~42% smaller for it).
• No magiskboot, no boot-image patching. The magiskboot native tool (the thing that unpacks and repacks a boot image) is stripped from the build, so boot-image patching cannot run. Kyubi installs in system mode only, writing into the guest's system partition. The boot-image install path is gone: the installer's boot-patch methods, boot_patch.sh, the ChromeOS signing tools, the addon.d survival script, and the recovery-flashable-zip metadata are all removed. Kyubi is not a recovery-flashable zip.
• No built-in Zygisk. The built-in Zygisk was removed upstream (commit 2ef8f00) over security vulnerabilities. Use ReZygisk for the Zygisk API; Kyubi's DenyList feeds it.

Everything else works: MagiskSU (root), Magisk Modules, DenyList.

Downloads

Grab a build from Releases. Every push to kitsune publishes a rolling prerelease tagged v31.0-<short-commit> (the short hash is the build suffix in the version the app reports). These are candidates: CI verifies the build and that it installs and launches, but the system-mode root install is validated separately on a real instance. A blessed stable milestone (e.g. kyubi-1.0.0) is promoted from a validated prerelease through a manually-approved workflow, after the system-mode install is confirmed on a real instance.

Each release attaches only the certificate-verified release APKs (debug builds are not published):

• app-release.apk: the Kyubi manager (install this)
• stub-release.apk: the cert-pinned hidden-manager stub

Building

export ANDROID_SDK_ROOT=/path/to/android-sdk
python build.py ndk        # install the ondk (Magisk NDK, r27.1)
python build.py -r all     # release -> out/app-release.apk
python build.py all        # debug   -> out/app-debug.apk

Output APKs carry native libs for x86 and x86_64 only. CI in .github/workflows/android.yml builds and smoke-tests every push and pull request, and publishes the release on pushes to kitsune. Maintenance notes and the exact deltas from upstream live in MAINTAINER.md.

Bug reports

Report against a debug build and attach its log. For install issues, include the install log; for runtime issues, logcat or dmesg from the emulator.

Lineage & credit

Kyubi stands on a chain of GPL work, each link credited:

• Magisk: topjohnwu, the original.
• Magisk Delta: HuskyDG, which added the system-mode install Kyubi relies on.
• Kitsune Magisk: the continuation Kyubi forked from (core version 31.0-kitsune, versionCode 31000).

The in-app credits screen names the upstream authors directly. Kyubi keeps the lineage honest; it does not claim their work as its own.

License

Kyubi, including all git submodules, is free software: you can redistribute
it and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with
this program. If not, see <http://www.gnu.org/licenses/>.