Last week, I built a tiny Linux system from scratch, and booted it on my laptop! Here’s what it looked like: Let me tell you how I got there. I wanted to learn more about how the Linux kernel works, and what’s involved in booting it. So I set myself the goal to cobble together the bare neccessities required to boot into a working shell. In the end, I had a tiny Linux system with a size of 2.5 MB,
llm-wiki
llm-wiki.md LLM Wiki A pattern for building personal knowledge bases using LLMs. This is an idea file, it is designed to be copy pasted to your own LLM Agent (e.g. OpenAI Codex, Claude Code, OpenCode / Pi, or etc.). Its goal is to communicate the high level idea, but your agent will build out the specifics in collaboration with you. The core idea Most people's experience with LLMs and documents lo
written on June 12, 2025 There is currently an explosion of people sharing their experiences with agentic coding. After my last two posts on the topic, I received quite a few questions about my own practices. So, here goes nothing. Preface For all intents and purposes, here’s what I do: I predominently use Claude Code with the cheaper Max subscription for $100 a month 1. That works well for severa
GitHub - modelcontextprotocol/servers: Model Context Protocol Servers
Official integrations are maintained by companies building production ready MCP servers for their platforms. 21st.dev Magic - Create crafted UI components inspired by the best 21st.dev design engineers. 2slides - An MCP server that provides tools to convert content into slides/PPT/presentation or generate slides/PPT/presentation with user intention. ActionKit by Paragon - Connect to 130+ SaaS inte
Peter Jay Salzman, Michael Burian, Ori Pomerantz, Bob Mottram, Jim Huang 1 Introduction 1.1 Authorship 1.2 Acknowledgements 1.3 What Is A Kernel Module? 1.4 Kernel module package 1.5 What Modules are in my Kernel? 1.6 Is there a need to download and compile the kernel? 1.7 Before We Begin 2 Headers 3 Examples 4 Hello World 4.1 The Simplest Module 4.2 Hello and Goodbye 4.3 The __init and __exit Mac
Claude Code handles complex, multi-step projects well, but long sessions accumulate weight. Every file read, every tangent explored, every half-finished thought stays in the context window, slowing responses and driving up token costs. Consider building a new feature in a large TypeScript monorepo. The main work is the implementation, but side tasks keep appearing: trace how an existing service ha
Preliminaries What Is xargs? It's an adapter between text streams and argv arrays, two essential concepts in shell. You pass it flags that specify how to split stdin. Then it generates arguments and invokes processes. Example: $ echo 'alice bob' | xargs -n 1 -- echo hi hi alice hi bob What's happening here? xargs splits the input stream on whitespace, producing 2 arguments, alice and bob. We passe
written on July 03, 2025 If you’ve been following me on Twitter, you know I’m not a big fan of MCP (Model Context Protocol) right now. It’s not that I dislike the idea; I just haven’t found it to work as advertised. In my view, MCP suffers from two major flaws: It isn’t truly composable. Most composition happens through inference. It demands too much context. You must supply significant upfront in
trufflehogを活用したGitHub Organizationのcredentialsスキャン - 10X Product Blog
こんにちは、セキュリティチームの@sota1235です。 突然ですが、ソフトウェアエンジニアの皆さんに質問です。他者に漏らしてはいけないAPI keyやSSHのprivate keyを誤ってGitHubにpushしてしまったことはありますか？私はあります。*1 日々、スピード感を持ってものづくりに臨んでいく中で本当はcommitしてはいけないものを間違ってcommitしたり、それに気づかずにGitHubにpushしてしまうなんてことは人間がミスをする生き物である以上、誰にでも起きえる事故です。 今回はそんな事故を検知するのにtrufflehogを活用しているお話をします。 なお今回は事故を未然に予防する話には触れません。 github.com credentialsを誤ってGitHubにpushすることのリスク credentialsとは credentialsのあるべき管理方法 GitH
[PG] 縮めるだけじゃダメ [PG] 暗算でもできるけど？ [PG] formjacking [PG] loop in loop [NW] 頭が肝心です [NW] 3 Way Handshake？ [NW] さあ得点は？ [NW] decode [WE] 簡単には見せません [WE] 試練を乗り越えろ！ [WE] 直してる最中なんです [WE] 直接聞いてみたら？ [WE] 整列！ [CY] エンコード方法は一つじゃない [CY] File Integrity of Long Hash [CY] Equation of ECC [CY] PeakeyEncode [FR] 露出禁止！ [FR] 成功の証 [FR] 犯人はこの中にいる！ [FR] chemistry [FR] InSecureApk [PW] CVE-2014-7169他 [PW] 認可は認証の後 [PW] formerL
Update 1.69.1: The update addresses these issues. Update 1.69.2: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the June 2022 release of Visual Studio Code. There are many updates in this version that we hope you'll like, some of the key highlights include: 3-way merge editor - Resolve merge conflicts wit
The Unix shell is over 50 years old, but it still defines how programmers use their computers. We type a few words in a terminal, and milliseconds later an ephemeral factory comes online: the Unix pipeline. Data streams through a network of simple programs working concurrently, like robots on the factory floor, executing a computational choreography we composed seconds ago. Its job done, the facto
Weird Lexical Syntax
I just learned 42 programming languages this month to build a new syntax highlighter for llamafile. I feel like I'm up to my eyeballs in programming languages right now. Now that it's halloween, I thought I'd share some of the spookiest most surprising syntax I've seen. The languages I decided to support are Ada, Assembly, BASIC, C, C#, C++, COBOL, CSS, D, FORTH, FORTRAN, Go, Haskell, HTML, Java,
Posted on Tuesday, April 2, 2024. Updated Wednesday, April 3, 2024. Introduction Andres Freund published the existence of the xz attack on 2024-03-29 to the public oss-security@openwall mailing list. The day before, he alerted Debian security and the (private) distros@openwall list. In his mail, he says that he dug into this after “observing a few odd symptoms around liblzma (part of the xz packag
What Changed Since May It’s incredible how far “vibe coding” has come this year. Whereas in ~May I was amazed that some prompts produced code that worked out of the box, this is now my expectation. I can ship code now at a speed that seems unreal. I burned a lot of tokens since then. Time for an update. It’s funny how these agents work. There’s been this argument a few weeks ago that one needs to
Update 1.80.1: The update addresses these issues. Update 1.80.2: The update addresses this security issue. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the June 2023 release of Visual Studio Code. There are many updates in this version that we hope you'll like, some of the key highlights include: Accessibility improvements - Accessible V
Building agents that reach production systems with MCP | Claude
https://claude.com/blog/building-agents-that-reach-production-systems-with-mcp Agents are only as useful as the systems they can reach. Teams tend to converge on three approaches for connecting them to external systems—direct API calls, CLIs, and MCP. This post lays out where each fits, why production agents tend to land on MCP, and the patterns for building those integrations effectively. Connect
Join a VS Code Dev Days event near you to learn about AI-assisted development in VS Code. Update 1.70.1: The update addresses these issues. Update 1.70.2: The update addresses these issues. Update 1.70.3: This update is only available for Windows 7 users and is the last release supporting Windows 7. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welc
In July 2022, I released dax for Deno providing a cross-platform shell for JavaScript written in JavaScript: const data = $.path("data.json").readJsonSync(); await $`git add . && git commit -m "Release ${data.version}"`; This is similar and inspired by zx, but because it uses a cross-platform shell with common built-in cross-platform commands, more code is going to work the same way on different o
I’ve become convinced that “little languages”–small languages designed to solve very specific problems–are the future of programming, particularly after reading Gabriella Gonzalez’s The end of history for programming and watching Alan Kay’s Programming and Scaling talk. You should go check them out because they’re both excellent, but if you stick around I’ll explain just what I mean by “little lan
The Top 100 Video Games of All TimeOur first refresh since 2019 features some big changes. IGN’s Top 100 games list encompasses the best of the best throughout history, spanning generations of consoles, PCs, handhelds, and more. Our list last saw a major update back in 2019, and since then, there have been several games released that deserved to be added. Just as importantly, we looked at the tota
World’s First MIDI Shellcode Jan 2025 · 45 min read I gained remote code execution via MIDI messages to trick my synth into playing Bad Apple on its LCD. This blog post is about my journey with this reverse engineering project. Final iteration of Bad Apple The beginning I’ve had this Yamaha PSR-E433 synth for a very long time, and a couple of years ago I decided to open it up — partly because it w
I first learned Kubernetes ("k8s" for short) in 2018, when my manager sat me down and said "Cloudflare is migrating to Kubernetes, and you're handling our team's migration." This was slightly terrifying to me, because I was a good programmer and a mediocre engineer. I knew how to write code, but I didn't know how to deploy it, or monitor it in production. My computer science degree had taught me a
OpenBSD is an operating system that's famous for its focus on security. Unfortunately, OpenBSD leader Theo states that there are only 7000 users of OpenBSD. So it's a very small but elite group, that wields a disproportionate influence; since we hear all the time about the awesome security features these guys get to use, even though we usually can't use them ourselves. Pledge is like the forbidden
The other day at work we had a Bash script that would set up a web server and wait for it to be up before proceeding to the next things. The script worked fine and we had no issues, until we had an infinite loop. We were using the Bash built-in until to check if the web server was up: until curl --silent --fail-with-body 10.0.0.1:8080/health; do sleep 1 done This works fine. Unless our web server
Ubuntu 26.04 Rust Coreutils: uutils vs GNU Guide | ComputingForGeeks
Tools that live in findutils rather than coreutils, like xargs, find, and locate, are unaffected by this transition. Same for rsync and tar, which statcall directly and never shell out to coreutils utilities. Real behavioral differences between uutils 0.8.0 and GNU 9.7 Upstream parity at 94.74% is impressive, but the remaining 5% can bite in specific places. Every one of these is testable on the s
How a simple Linux kernel memory corruption bug can lead to complete system compromise
In this case, reallocating the object as one of those three types didn't seem to me like a nice way forward (although it should be possible to exploit this somehow with some effort, e.g. by using count.counter to corrupt the buf field of seq_file). Also, some systems might be using the slab_nomerge kernel command line flag, which disables this merging behavior. Another approach that I didn't look
My thoughts on writing a Minecraft server from scratch (in Bash) For the past year or so, I've been thinking about writing a Minecraft server in Bash as a thought excercise. I once tried that before with the Classic protocol (the one from 2009), but I quickly realized there wasn't really a way to properly parse binary data in bash. Take the following code sample: function a() { read -n 2 uwu echo
Eyes Above The Waves Robert O'Callahan. Christian. Repatriate Kiwi. Hacker. Archive 2025 June Not Joking About AI Building A PC April Rakiura Northwest Circuit February Tongariro Northern Circuit 2025 January Pararaha Valley 2025 2024 December Mt Arthur/Tablelands/Cobb Valley November Queen Charlotte Track 2024 October Auckland Half Marathon 2024 Advanced Debugging Technology In Practice June Waih
Tier 4 Support § Support for these targets is entirely experimental. If this target is provided by LLVM, LLVM may have the target as an experimental target, which means that you need to use Zig-provided binaries for the target to be available, or build LLVM from source with special configure flags. zig targets will display the target if it is available. This target may be considered deprecated by
Table of Contents Highlights Handling of Filenames in Shell Modern C Limits & Cooperation Makefiles Logging Internationalization Minor Changes Changes Index In the 1950s, computers did not really interoperate. ARPANET has not yet happened (that would become a thing in the 60s), and every operating system was typically tied to the hardware that was meant to run on. Most communication actually happe
Making a Chess Engine in Zig
I had the honor of speaking at Systems Distributed at the end of June. Since it was hosted by TigerBeetle who is one of the largest zig users, a lot of the zig community was there. After talking to some of them, Zig seemed more interesting for me to try out. Around the same time my youtube algorithm got me hooked on chess content. I’m not a good chess player by any means, but it started giving me
That's 93.6% faster median latency and near-perfect reliability compared to the standard approaches for scaling Node.js applications. These results come from production-grade benchmarks on real Next.js applications running on Kubernetes, comparing three common deployment strategies with identical total CPU resources (6 CPUs each). All configurations were tested under the same sustained load patter
We recently overhauled our internal tools for visualizing the compilation of JavaScript and WebAssembly. When SpiderMonkey’s optimizing compiler, Ion, is active, we can now produce interactive graphs showing exactly how functions are processed and optimized. You can play with these graphs right here on this page. Simply write some JavaScript code in the test function and see what graph is produced
my website is one binary 2022-04-06 ---------------------------- a.k.a. this one weird trick that inspires me to program creatively i have struggled for years to figure out a website framework that feels good to me. i tried all of the classics, including but limited to: - ghost - hugo - jekyll - sr.ht + tarball - manual html editing i have very high and unusual standards, and none of the above fel
Advanced React in the Wild
Advanced React in the WildProduction Case Studies from Ambitious Web Projects (2022–2025) Introduction React and Next.js have powered some of the web’s most ambitious projects in the last few years. In this period, teams have pushed the envelope on performance (achieving dramatic gains in Core Web Vitals like LCP and the new INP metric), balanced server-side and client-side rendering trade-offs, d
Try Mastering Emacs for free! Are you struggling with the basics? Have you mastered movement and editing yet? When you have read Mastering Emacs you will understand Emacs. It’s that time again: there’s a new major version of Emacs and, with it, a treasure trove of new features and changes. Notable features include the formal inclusion of native compilation, a technique that will greatly speed up y
Amazon FSx for NetApp ONTAPファイルシステム上のiSCSI LUNをマウントしてみた | DevelopersIO
Amazon FSx for NetApp ONTAPは単純なファイルサーバーじゃないぞ こんにちは、のんピ(@non____97)です。 皆さんはMulti-AZのEBSボリュームを欲しいなと思ったことはありますか? 私はあります。 EBSボリュームはAZ単位なのでAZ障害のことを考えるとちょっと心配です。かと言って自分でブロックレベルのレプリケーションを実装するのも何だか大変です。 そこで、Amazon FSx for NetApp ONTAPの出番です。 Amazon FSx for NetApp ONTAPはファイルサーバーとしての機能だけではなく、ブロックストレージとしての機能も有しています。 Q: Amazon FSx for NetApp ONTAP はどのプロトコルをサポートしていますか? A: Amazon FSx for NetApp ONTAP は、ネットワークファイ
Node.js
Notable changes Add support for externally shared js builtins By default Node.js is built so that all dependencies are bundled into the Node.js binary itself. Some Node.js distributions prefer to manage dependencies externally. There are existing build options that allow dependencies with native code to be externalized. This commit adds additional options so that dependencies with JavaScript code
Create a Dev Container
The Visual Studio Code Dev Containers extension lets you use a Docker container as a full-featured development environment. It allows you to open any folder or repository inside a container and take advantage of Visual Studio Code's full feature set. A devcontainer.json file in your project tells VS Code how to access (or create) a development container with a well-defined tool and runtime stack.
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Building a tiny Linux from scratch
Agentic Coding Recommendations
The Linux Kernel Module Programming Guide
How and when to use subagents in Claude Code | Claude
An Opinionated Guide to xargs
Tools: Code Is All You Need
防衛省サイバーコンテスト 2025 Writeup - はまやんはまやんはまやん
June 2022 (version 1.69)
A Shell for the Container Age: Introducing Dagger Shell | Dagger
research!rsc: The xz attack shell script
Shipping at Inference-Speed | Peter Steinberger
June 2023 (version 1.80)
July 2022 (version 1.70)
dax - Cross-platform shell tools for Node.js
Little Languages Are The Future Of Programming
The Top 100 Video Games of All Time - IGN
World's First MIDI Shellcode
Solving common problems with Kubernetes
Porting OpenBSD pledge() to Linux
TIL: timeout in Bash scripts | Heitor's log
My thoughts on writing a Minecraft server from scratch (in Bash)
So You Want To Build A Browser Engine
0.10.0 Release Notes ⚡ The Zig Programming Language
What’s New in POSIX 2024 – XCU
Accelerate Next.js in Kubernetes
Who needs Graphviz when you can build it yourself?
j3s.sh
What's New in Emacs 28.1?