android-fastboot
Use for fastboot operations, flashing partitions, bootloader unlocking, recovery mode, or partition management. Triggers on "fastboot", "flash boot.img", "unlock bootloader", "recovery mode", "TWRP", "Magisk", "partition", "sideload", "A/B slots". WARNING - These operations can brick devices if done incorrectly.
- Installs
- 125
- Last 24h
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- Trending rank
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- Security
- Not audited
Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/hyperb1iss/hyperdroid-skill --skill android-fastboot- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads android-fastboot automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Android Fastboot Operations
⚠️ DANGER ZONE - Fastboot operations write directly to device partitions. Wrong images or interrupted operations can brick devices. Always verify:
- Correct device (check
fastboot getvar product) - Correct images for exact device model
- Bootloader is unlocked (for flashing)
- Battery > 50%
Entering Fastboot Mode
# From ADB (device running)
adb reboot bootloader
# Hardware buttons (most devices)
# Power + Volume Down (hold until fastboot screen)
Basic Commands
fastboot devices # List connected devices
fastboot getvar all # All device variables
fastboot reboot # Reboot to system
fastboot reboot bootloader # Stay in bootloader
fastboot reboot recovery # Boot to recovery
fastboot reboot fastboot # Boot to fastbootd (Android 10+)
Check Before Flashing
# ALWAYS run these first
fastboot devices # Verify connection
fastboot getvar product # Verify device model
fastboot getvar unlocked # Must be "yes" for flashing
fastboot getvar current-slot # Know current A/B slot
fastboot getvar battery-level # Should be > 50
Bootloader Unlocking
Google Pixel
# 1. Enable OEM unlocking in Developer Options
# 2. Boot to fastboot
adb reboot bootloader
# 3. Unlock
fastboot flashing unlock
# 4. Confirm on device with volume keys + power
# WARNING: This wipes all data!
Other Manufacturers
| Brand | Process |
|---|---|
| OnePlus | fastboot oem unlock |
| Xiaomi | Mi Unlock Tool (waiting period) |
| Samsung | Uses Odin, not fastboot |
| Motorola | Request code from website, fastboot oem unlock <code> |
| Sony | Request code from website |
Check Unlock Status
fastboot getvar unlocked # yes/no
fastboot getvar device-state # locked/unlocked
fastboot getvar unlock_ability # Can be unlocked?
Flashing Partitions
Individual Partitions
fastboot flash boot boot.img
fastboot flash recovery recovery.img # Non-A/B only
fastboot flash dtbo dtbo.img
fastboot flash vbmeta vbmeta.img
# Disable verification (for custom ROMs)
fastboot flash --disable-verity --disable-verification vbmeta vbmeta.img
Bootloader & Radio (Extra Careful!)
# These can hard-brick if wrong!
fastboot flash bootloader bootloader.img
fastboot reboot bootloader # REQUIRED after bootloader flash
fastboot flash radio radio.img
fastboot reboot bootloader # Recommended after radio flash
Temporary Boot (No Flash)
# Test before committing - reboots to normal after restart
fastboot boot recovery.img
fastboot boot patched_boot.img
A/B Slot Devices
Modern devices have two copies of each partition (A and B).
# Check current slot
fastboot getvar current-slot # Returns: a or b
# Set active slot
fastboot set_active a
fastboot set_active b
# Flash to specific slot
fastboot flash boot_a boot.img
fastboot flash boot_b boot.img
# Flash to both slots
fastboot --slot=all flash boot boot.img
Dynamic Partitions (Android 10+)
Large partitions (system, vendor, product) live inside a "super" partition.
Fastbootd Mode
# Enter userspace fastboot
fastboot reboot fastboot
# Check if in fastbootd
fastboot getvar is-userspace # Should return: yes
Flash Dynamic Partitions
# Must be in fastbootd mode!
fastboot reboot fastboot
fastboot flash system system.img
fastboot flash vendor vendor.img
fastboot flash product product.img
Virtual A/B Snapshots
# Check snapshot status
fastboot getvar snapshot-update-status
# Cancel stuck update (CAREFUL!)
fastboot snapshot-update cancel
Recovery Operations
Enter Recovery
adb reboot recovery
# Or: Power + Volume Up (varies by device)
ADB Sideload
# 1. In recovery, select "Apply update from ADB"
# 2. Run:
adb sideload update.zip
Flash Custom Recovery (TWRP)
# Test first (temporary boot)
fastboot boot twrp.img
# If it works, flash permanently
# Non-A/B devices:
fastboot flash recovery twrp.img
# A/B devices (recovery in boot):
fastboot flash boot twrp.img
Magisk (Root)
Installation
# 1. Extract boot.img from your firmware
# 2. Transfer to device, patch with Magisk app
# 3. Pull patched image
adb pull /sdcard/Download/magisk_patched_*.img
# 4. Flash patched boot
fastboot flash boot magisk_patched_*.img
# 5. Reboot
fastboot reboot
Useful Magisk Commands (after rooted)
adb shell su -c "magisk --version"
adb shell su -c "resetprop ro.debuggable 1"
Factory Reset / Wipe
fastboot erase userdata # Wipe user data
fastboot erase cache # Wipe cache (if exists)
fastboot -w # Format data + cache
# Full flash with wipe
fastboot -w flashall
fastboot -w update image.zip
Danger Levels
| Level | Operations |
|---|---|
| ✅ SAFE | devices, getvar, reboot, boot (temp) |
| ⚠️ MEDIUM | flash boot/recovery/dtbo, set_active |
| 🔴 HIGH | flash system/vendor, erase, -w |
| ☠️ CRITICAL | flash bootloader, flash radio, flashing lock with custom OS |
Brick Prevention
Never:
- Flash images from different device models
- Interrupt a flash operation
- Lock bootloader with custom ROM installed
- Flash bootloader/radio without matching versions
Always:
- Verify device with
fastboot getvar product - Keep stock images available for recovery
- Use
fastboot bootto test beforefastboot flash - Maintain battery > 50%
Recovery from Soft Brick
# 1. Enter fastboot (Power + Vol Down)
fastboot devices
# 2. Flash stock boot
fastboot flash boot boot.img
# 3. For dynamic partitions
fastboot reboot fastboot
fastboot flash system system.img
fastboot flash vendor vendor.img
# 4. Wipe if needed
fastboot -w
# 5. Reboot
fastboot reboot
For hard bricks (no fastboot access), you need EDL mode (Qualcomm) or manufacturer service tools.
Quick Reference
| Task | Command |
|---|---|
| Check connection | fastboot devices |
| Device info | fastboot getvar all |
| Unlock bootloader | fastboot flashing unlock |
| Flash boot | fastboot flash boot boot.img |
| Test recovery | fastboot boot twrp.img |
| Current slot | fastboot getvar current-slot |
| Switch slot | fastboot set_active a |
| Wipe data | fastboot -w |
| Reboot | fastboot reboot |
FAQ
What does the android-fastboot skill do?
Use for fastboot operations, flashing partitions, bootloader unlocking, recovery mode, or partition management. Triggers on "fastboot", "flash boot.img", "unlock bootloader", "recovery mode", "TWRP", "Magisk", "partition", "sideload", "A/B slots". WARNING - These operations can brick devices if done incorrectly.
How do I install android-fastboot?
Run npx skills add https://github.com/hyperb1iss/hyperdroid-skill --skill android-fastboot in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/android-fastboot/ (personal) or .claude/skills/android-fastboot/ (project).
Which AI agents can use android-fastboot?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is android-fastboot safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains android-fastboot?
It is published by hyperb1iss in hyperb1iss/hyperdroid-skill. It has 125 recorded installs.
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