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Agent skill

Qemu For Kernel Development

by mohitmishra786 in mohitmishra786/low-level-dev-skills

QEMU kernel development skill for driver and kernel testing.

MITAuto-check passedDevelopment

Install Qemu For Kernel Development

skills CLI
$ npx skills add mohitmishra786/low-level-dev-skills --skill qemu-for-kernel-development -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install mohitmishra786/low-level-dev-skills qemu-for-kernel-development --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/kernel-dev/qemu-for-kernel-development .claude/skills/qemu-for-kernel-development && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
qemu-for-kernel-development
GitHub stars
253
Token cost
~807 tokens
SKILL.md length
204 words
Files
1
Skills in repo
138
Repo updated
First seen
Licence
MIT

At a glance

QEMU kernel development skill for driver and kernel testing.

  • Works in 6 steps: Minimal direct kernel boot (arm64 virt) → Buildroot rootfs loop → Out-of-tree module test → …
  • Booting custom kernels in QEMU
  • SKILL.md covers Purpose, When to Use, Workflow and Common Problems, plus 1 more section
  • Calls make

What it does

Qemu For Kernel Development is an agent skill from mohitmishra786/low-level-dev-skills. QEMU kernel development skill for driver and kernel testing. Use when booting custom kernels in QEMU, Buildroot/Yocto rootfs, virtio devices, or NFS root for driver iteration. Activates on queries about QEMU kernel dev, Buildroot QEMU, virtio block, kernel module test QEMU, or -append root=

Its SKILL.md is about 810 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development. The repository describes itself as: A curated suite of AI agent skills for systems and low-level programming with C/C++, Rust, and Zig toolchains, covering compilers, debuggers, profilers, build systems…. The licence is MIT.

When your agent uses it

  • Booting custom kernels in QEMU
  • Buildroot/Yocto rootfs
  • NFS root for driver iteration

Example prompts

  • “/qemu-for-kernel-development”

Workflow steps

6 steps, taken from the step headings in SKILL.md.

  1. Minimal direct kernel boot (arm64 virt)
  2. Buildroot rootfs loop
  3. Out-of-tree module test
  4. GDB stub for kernel
  5. Device tree overrides
  6. Agent usage

What it can do on your machine

Read from SKILL.md and the folder at commit bdc5847. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • make

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Qemu For Kernel Development loads about 807 tokens when it runs. Until then it costs about 80 tokens; SKILL.md has 204 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~80
When it runs · the whole SKILL.md, loaded when a task matches
~807

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from mohitmishra786/low-level-dev-skills at commit bdc5847, republished under its MIT licence (© mohitmishra786). 204 words, ~807 tokens.

Download SKILL.mdSave it as .claude/skills/qemu-for-kernel-development/SKILL.md (or your agent's skills folder).
name
qemu-for-kernel-development
description
QEMU kernel development skill for driver and kernel testing. Use when booting custom kernels in QEMU, Buildroot/Yocto rootfs, virtio devices, or NFS root for driver iteration. Activates on queries about QEMU kernel dev, Buildroot QEMU, virtio block, kernel module test QEMU, or -append root=

QEMU for Kernel Development

Purpose

Guide agents through QEMU-based kernel and driver development workflows: building/booting custom kernels, attaching virtio block/network, using Buildroot or minimal initramfs, and rapid module test cycles — focused on kernel dev vs general skills/virtualization/qemu-kvm.

When to Use

  • Test kernel patch without bare metal
  • Develop driver against virtio or emulated DT platform
  • CI kernel boot smoke test
  • NFS or 9p root for fast edit-compile-test

Workflow

1. Minimal direct kernel boot (arm64 virt)
bash
qemu-system-aarch64 \
  -machine virt -cpu cortex-a57 -smp 4 -m 2G \
  -kernel arch/arm64/boot/Image \
  -append "console=ttyAMA0 root=/dev/vda rw" \
  -drive if=virtio,file=rootfs.ext4,format=raw \
  -netdev user,id=net0 -device virtio-net-device,netdev=net0 \
  -nographic

x86_64:

bash
qemu-system-x86_64 -enable-kvm -m 4G -smp 4 \
  -kernel arch/x86/boot/bzImage \
  -append "console=ttyS0 root=/dev/vda rw" \
  -drive file=rootfs.img,format=raw,if=virtio \
  -nographic
2. Buildroot rootfs loop
bash
cd buildroot
make qemu_aarch64_virt_defconfig
make
# output/images/Image, rootfs.ext4

Integrate custom kernel: set BR2_LINUX_KERNEL_CUSTOM_VERSION or external tree.

3. Out-of-tree module test
bash
# on host — cross build
make -C $KERNEL_SRC M=$PWD modules
# in guest or via initramfs
insmod mydriver.ko
dmesg | tail

Share tree with 9p:

bash
-fsdev local,id=dev,path=$PWD,security_model=none \
-device virtio-9p-pci,fsdev=dev,mount_tag=hostshare
# guest: mount -t 9p -o trans=virtio hostshare /mnt
4. GDB stub for kernel
bash
qemu-system-aarch64 ... -s -S
gdb vmlinux
(gdb) target remote :1234
(gdb) break start_kernel

Use CONFIG_KGDB for live kernel debugging after boot.

5. Device tree overrides
bash
qemu-system-aarch64 -machine virt -dtb myboard.dtb ...

virt machine provides virtio devices; platform drivers can target QEMU -device models.

6. Agent usage
/qemu-for-kernel-development Boot arm64 virt with custom Image and virtio rootfs for driver CI

Common Problems

SymptomCauseFix
Kernel panic no rootWrong root=root=/dev/vda for virtio blk
No console outputMissing console= on cmdlineconsole=ttyAMA0 / ttyS0
Module vermagic errorBuilt against wrong treeSame KERNEL_SRC as booted image
Slow without KVMTCG emulation-enable-kvm on x86 host
DTB mismatchWrong machineUse virt DTB from kernel make dtbs
  • skills/virtualization/qemu-kvm — KVM, VFIO, libvirt
  • skills/qemu/qemu-embedded-simulation — bare-metal MCU QEMU
  • skills/kernel/kernel-testing — KUnit, kselftest
  • skills/kernel-dev/device-tree — DT for virt/platform
  • skills/debuggers/gdb — remote GDB basics

© mohitmishra786, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/kernel-dev/qemu-for-kernel-development of mohitmishra786/low-level-dev-skills.

Open the folder on GitHubat commit bdc5847

Compare with similar skills

Qemu For Kernel Development next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

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PR Babysitteropeninterpreter/openinterpreter69k3 repos~4.2kAutomated safety check: PassApache-2.0
Code Review ChecklistshareAI-lab/learn-claude-code78k5 repos~1.1kAutomated safety check: PassMIT

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Categories

Questions about Qemu For Kernel Development

What does Qemu For Kernel Development do?

QEMU kernel development skill for driver and kernel testing. Qemu For Kernel Development is an agent skill from mohitmishra786/low-level-dev-skills. QEMU kernel development skill for driver and kernel testing.

When should I use Qemu For Kernel Development?

Qemu For Kernel Development fits situations like: booting custom kernels in QEMU; buildroot/Yocto rootfs; NFS root for driver iteration.

How do I install Qemu For Kernel Development in Claude Code?

Run `npx skills add mohitmishra786/low-level-dev-skills --skill qemu-for-kernel-development -a claude-code`. Or copy the skill folder (skills/kernel-dev/qemu-for-kernel-development in mohitmishra786/low-level-dev-skills) into .claude/skills/qemu-for-kernel-development in your project. Claude Code loads it when a task matches its description.

How do I install Qemu For Kernel Development in Codex?

Run `npx skills add mohitmishra786/low-level-dev-skills --skill qemu-for-kernel-development -a codex`. Or copy the skill folder (skills/kernel-dev/qemu-for-kernel-development in mohitmishra786/low-level-dev-skills) into .agents/skills/qemu-for-kernel-development in your project. Codex loads it when a task matches its description.

Can I use Qemu For Kernel Development in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mohitmishra786/low-level-dev-skills --skill qemu-for-kernel-development -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/qemu-for-kernel-development, .gemini/skills/qemu-for-kernel-development, .github/skills/qemu-for-kernel-development and .opencode/skills/qemu-for-kernel-development in your project.

What does Qemu For Kernel Development need to run?

Going by SKILL.md and its folder, Qemu For Kernel Development needs the command-line tools its instructions call (make).

Does Qemu For Kernel Development access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Qemu For Kernel Development safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Qemu For Kernel Development use?

Qemu For Kernel Development is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Qemu For Kernel Development use?

About 807 tokens (SKILL.md is roughly 3.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Qemu For Kernel Development?

Skills that share tags, products or a category with Qemu For Kernel Development: Vercel Composition Patterns (supabase/supabase, 111k stars), Finishing a Development Branch (obra/superpowers, 297k stars), Typescript Advanced Types (rolling-scopes/rsschool-app, 10k stars) and PR Babysitter (openinterpreter/openinterpreter, 69k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Qemu For Kernel Development?

mohitmishra786 (a GitHub user) maintains it in mohitmishra786/low-level-dev-skills, which has 253 GitHub stars. The repository holds 138 skills in this directory. The repository was last updated on June 27, 2026.

Source: mohitmishra786/low-level-dev-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.