[OnePlus 7 Pro Guides, News, & Discussion] Dan_Jacques:
This script was made to 9.5.8 OP7 OxygenOS, some things can be different in future, so report if something is broken. Use at your own risk and feel free to experiment as this is a systemless mod.

First, the prerequisites:

1- Unlocked bootloader with Magisk and TWRP (you can use temporary TWRP if you please). If you don't know what is that, take a look at the XDA threads about it, it's easy. Please don't ask about "how to unlock bootloader" or "how to install Magisk".

2- Debloater (Terminal Emulator) Magisk module. Download it from Magisk Manager.

3- Any Terminal Emulator app.

4- import-debloat.txt config file. Download it here

5. Backup :P (yeah, this module doesn't change anything in /system and can be reverted at any time, but backups are always welcome)

6. Magisk Mount script. Download it from here

Magisk mount is needed to "reinstall" system apps by deleting the dummy folders from Magisk partition if something breaks.

If you have everything handy it should be a matter of few seconds to debloat.

Let's deal with useless system apps, temeletry, some ****ty apps. According from the [MENTION=4637983]Tomatot-[/MENTION] thread:

Debloated apps list (It's the same Tomatot-'s Light app list):

AntHalService^=/system/app/AntHalService
AutoRegistration^=/system/app/AutoRegistration
BasicDreams^=/system/app/BasicDreams
BookmarkProvider^=/system/app/BookmarkProvider
BTtestmode^=/system/app/BTtestmode
PrintService^=/system/app/BuiltInPrintService
card^=/system/app/card
EasterEgg^=/system/app/EasterEgg
EgineeringMode^=/system/app/EngineeringMode
EngSpecialTest^=/system/app/EngSpecialTest
GooglePrint^=/system/app/GooglePrintRecommendationService
GoogleTTS^=/system/app/GoogleTTS
LogKitSdService^=/system/app/LogKitSdService
NetflixActivation^=/system/app/Netflix_Activation
NetflixStub^=/system/app/Netflix_Stub
NFCTestMode^=/system/app/NFCTestMode
OEMTCMA^=/system/app/oem_tcma
OEMAutoTestServer^=/system/app/OemAutoTestServer
OEMLogKit^=/system/app/OEMLogKit
OnePlusBugReport^=/system/app/OPBugReportLite
OnePlusCommonLogTool^=/system/app/OPCommonLogTool
OPSesAuthentication^=/system/app/OPSesAuthentication
PartnerBoorkmarksProvider^=/system/app/PartnerBookmarksProvider
PhotosOnline^=/system/app/PhotosOnline
PlayAutoInstallConfig^=/system/app/PlayAutoInstallConfig
QdcmFF^=/system/app/QdcmFF
RFTuner^=/system/app/RFTuner
SensorTestTool^=/system/app/SensorTestTool
SoterService^=/system/app/SoterService
Stk^=/system/app/Stk
Talkback^=/system/app/talkback
Traceur^=/system/app/Traceur
UIMRemoteClient^=/system/app/uimremoteclient
Video^=/system/app/Videos
WallpaperBackup^=/system/app/WallpaperBackup
WAPICertManage^=/system/app/WapiCertManage
WIFIRFTestApk^=/system/app/WifiRfTestApk
GoogleFeedback^=/system/priv-app/GoogleFeedback
OnePlusCellBroadcastReceiver^=/system/priv-app/OPCellBroadcastReceiver
Tag^=/system/priv-app/Tag
USBDrivers^=/system/etc/usb_drivers.iso
Reserve^=/system/reserve
RFToolkit^=/vendor/app/Rftoolkit
AmazonShittyApps^=/vendor/etc/apps
Account^=/system/app/Account
OPBackup^=/system/app/Backup
BackupRestoreRemoteService^=/system/app/BackupRestoreRemoteService
CarrierDefaultApp^=/system/app/CarrierDefaultApp
CTSShimPrebuilt^=/system/app/CtsShimPrebuilt
GoogleDrive^=/system/app/Drive
GoogleDuo^=/system/app/Duo
GooglePay^=/system/app/GooglePay
HTMLViewer^=/system/app/HTMLViewer
GooglePlayMusic^=/system/app/Music2
NVBackupUI^=/system/app/NVBackupUI
OnePlusPush^=/system/app/OPPush
YouTube^=/system/app/YouTube
BackupRestoreConfirmation^=/system/priv-app/BackupRestoreConfirmation
CallLogBackup^=/system/priv-app/CallLogBackup
CTSShimPrivPrebuilt^=/system/priv-app/CtsShimPrivPrebuilt
GoogleRestore^=/system/priv-app/GoogleRestore
GoogleBackupTransport^=/system/priv-app/GoogleBackupTransport
GoogleOneTimeInitializer^=/system/priv-app/GoogleOneTimeInitializer
ManagedPrivisioning^=/system/priv-app/ManagedProvisioning
OnePlusWizard^=/system/priv-app/OnePlusWizard
OPAppLocker^=/system/priv-app/OPAppLocker
OnePlusDeviceManager^=/system/priv-app/OPDeviceManager
OnePlusDeviceManagerProvider^=/system/priv-app/OPDeviceManagerProvider
SharedStorageBackup^=/system/priv-app/SharedStorageBackup

Let's start this!

1. Copy the import-debloat.txt config file to the folder /data/cache in the root. (you can copy it by a root explorer or reboot into recovery and copy it by TWRP file explorer)

2. Install the Debloater (Terminal Emulator) Magisk module using the Magisk Manager.

3. Open the terminal emulator app

> Type 'su' and press enter

> Grant root permissions

> Type debloat and press enter.

4. You will see the options to debloat in various categories which are self explanatory. As we have the config file which has a predefined app list to de-bloat stored in /data/cache folder in root already. Type 'i' which says import config and press enter 2 times.

5. Reboot 2 times and you're done most probably if nothing breaks.

Ta-dah! Fully debloated OOS. To keep the debloat after update the ROM, just reflash Magisk and you're fine. You don't need to do the procedure every update.

Read from here if something breaks (from [MENTION=2647244]Sreekant[/MENTION])

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Feel free to give any feedback about the script.

Special thanks to:

[MENTION=4637983]Tomatot-[/MENTION] (the apps list and some explanations are from his thread)

[MENTION=7042702]Sreekantt[/MENTION] (the thread base and original idea from debloat for Poco F1)

[MENTION=4470081]topjohnwu[/MENTION] (Magisk developer)

The Debloater (terminal) team