Published on December 14, 2020 · Updated on December 16, 2020 Bash scripts. Almost anyone needs to write one sooner or later. Almost no one says “yeah, I love writing them”. And that’s why almost everyone is putting low attention while writing them. I won’t try to make you a Bash expert (since I’m not a one either), but I will show you a minimal template that will make your scripts safer. You
防衛省サイバーコンテスト 2025 writeup - st98 の日記帳 - コピー
2/2に12時間というちょうどよい競技時間で開催された。21時終了だったけれども、11時45分ぐらいに最速で全完して1位🎉 第1回以来4年ぶりの優勝だ。昨年大会の第4回ではヒントの閲覧数で優勝を逃してしまって悔しい思いをしたので、雪辱を果たすことができ嬉しい。開始直後からずっと1位を独走できており、450名以上のプレイヤーがいる中で圧勝だったのも嬉しい。 昨年度や一昨年度はバルクが作問を担当していたが、今回はAGESTが担当していた。これまでの問題と比較すると全体的に易化したように思うが、解くにあたって発想の大きな飛躍を必要とするいわゆる「エスパー要素」のある問題はごく一部を除いて存在しておらず*1、よかったと思う。また、昨年度・一昨年度に引き続きwriteupは公開可能というのもよかった。 戦略というほどの戦略は立てていなかったけれども、とりあえずWebを見た後は全カテゴリを上から見て
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,
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 several reasons: I exclusively
俺達はいつまでも立ち尽くし見つめていた━━━ 数多の IAM ロールが移ろうように連鎖していく、そのさまを。 コンバンハ、「 IAM ロールはお面」おじさんです。 この世で最も大切なもの、それは繋がりであり、そして連なりですよね。 ということで、早速 IAM ロールで 10 連鎖してみました。 いや、せっかくなので 100 連鎖くらい行ってみましょうか。そうしましょう。興奮してきたな。 まとめ IAM ロールはそんな連鎖させるようなもんじゃない。 手始めに IAM ロールを 101 個作ろう 早速、 100 連鎖のために IAM ロールを 101 個作ります。 「 100 連鎖なのに 101 個なの？」と思うかもしれませんが、ヤマタノオロチの「股（首と首の間）」は 7 個しかありませんよね。（「岐」は 8 個あるんですけどね。）それと同じです。 101 個くらいの数なら「温かみのある手作業
Cargo.tomlにはデフォルトのメタデータとPyO3の依存関係（バージョン）などが記載されています。また、pyproject.tomlにはビルドツールとしてmaturinが使用されることなどがあらかじめ定義されています。 注目すべきはRustスクリプトを記述するsrc/lib.rsファイルです。以下のようなscaffold（足場）が最初から記載されています。 src/lib.rsにデフォルトで記載されているscaffold 1 use pyo3::prelude::*; 2 3 /// Formats the sum of two numbers as string. 4 #[pyfunction] 5 fn sum_as_string(a: usize, b: usize) -> PyResult<String> { 6 Ok((a + b).to_string()) 7 } 8 9
Don't write clean code, write CRISP code — Bitfield Consulting
I’m sure we’re all in favour of “clean code”, but it’s one of those motherhood-and-apple-pie things that no one can reasonably disagree with. Who wants to write dirty code, unless maybe it’s for a porn site? The problem, of course, is that few of us can agree on what “clean code” means, and how to get there. A rule like “methods should only do one thing”, looks great on a T-shirt, but it’s not so
Developers are increasingly relying on AI coding assistants to accelerate our daily workflows. These tools can autocomplete functions, suggest bug fixes, and even generate entire modules or MVPs. Yet, as many of us have learned, the quality of the AI’s output depends largely on the quality of the prompt you provide. In other words, prompt engineering has become an essential skill. A poorly phrased
January 30, 2023 In this post, we'll implement a GPT from scratch in just 60 lines of numpy. We'll then load the trained GPT-2 model weights released by OpenAI into our implementation and generate some text. Note: This post assumes familiarity with Python, NumPy, and some basic experience with neural networks. This implementation is for educational purposes, so it's missing lots of features/improv
A few months ago, I set myself the challenge of writing a C compiler in 500 lines of Python1, after writing my SDF donut post. How hard could it be? The answer was, pretty hard, even when dropping quite a few features. But it was also pretty interesting, and the result is surprisingly functional and not too hard to understand! There's too much code for me to comprehensively cover in a single blog
I use Claude Code. A lot. As a hobbyist, I run it in a VM several times a week on side projects, often with --dangerously-skip-permissions to vibe code whatever idea is on my mind. Professionally, part of my team builds the AI-IDE rules and tooling for our engineering team that consumes several billion tokens per month just for codegen. The CLI agent space is getting crowded and between Claude Cod
ChatGPT Retrieval Pluginに任意のベクトル検索エンジンProviderを実装する - エムスリーテックブログ
Overview エムスリーエンジニアリンググループ AI・機械学習チームでソフトウェアエンジニアをしている中村(po3rin) です。検索とGoが好きです。 エムスリーではChatGPTの可能性にいち早く注目して活用を検討している段階ですが、本格的なデータ投入にはまだ懸念もあり、セキュリティチームと検討を進めている段階です。 そんな中で個人または組織のドキュメントのセマンティック検索と取得を可能にするChatGPTプラグイン「ChatGPT Retrieval Plugin」が登場しました。 github.com 情報検索好きとしては黙っていられず、外部公開用のエムスリーAI・機械学習チームのメンバー紹介ドキュメントを使ってローカルで試してみました。 # 用意したドキュメント 中村弘武は東京都在住で、エムスリーという企業で働いでいます。 エムスリーの検索基盤を主に担当しています。また、書
LogLog Games
The article is also available in Chinese. Disclaimer: This post is a very long collection of thoughts and problems I've had over the years, and also addresses some of the arguments I've been repeatedly told. This post expresses my opinion the has been formed over using Rust for gamedev for many thousands of hours over many years, and multiple finished games. This isn't meant to brag or indicate su
Functional programming is finally going mainstream Object-oriented and imperative programming aren’t going away, but functional programming is finding its way into more codebases. Klint Finley // July 12, 2022 Paul Louth had a great development team at Meddbase, the healthcare software company he founded in 2005. But as the company grew, so did their bug count. That’s expected, up to a point. More
The Scary Thing About Automating Deploys - Engineering at Slack
Most of Slack runs on a monolithic service simply called “The Webapp”. It’s big – hundreds of developers create hundreds of changes every week. Deploying at this scale is a unique challenge. When people talk about continuous deployment, they’re often thinking about deploying to systems as soon as changes are ready. They talk about microservices and 2-pizza teams (~8 people). But what does continuo
Programming is an iterative process - as much as we would like to come up with the perfect solution from the start, it rarely works that way. Good programs often start as quick prototypes. The bad ones stay prototypes, but the best ones evolve into production code. Whether you’re writing games, CLI tools, or designing library APIs, prototyping helps tremendously in finding the best approach before
Claude Skills are awesome, maybe a bigger deal than MCP
Claude Skills are awesome, maybe a bigger deal than MCP 16th October 2025 Anthropic this morning introduced Claude Skills, a new pattern for making new abilities available to their models: Claude can now use Skills to improve how it performs specific tasks. Skills are folders that include instructions, scripts, and resources that Claude can load when needed. Claude will only access a skill when it
こんにちは、NTTドコモR&D戦略部の門間です。 この記事では、vLLMのコードを追いつつその中身の動きに迫りたいと思います。 最近、業務やプライベートでLLM関連のいろいろを触っていますが、 OSSのコードリーディングを通じてLLMの推論処理への理解を深めたいというモチベーションです。 🤖 vLLMって? 📚 前提知識 Attention Is All You Need Paged Attention Continuous Batching 📦 vLLMの開発用インストール (Pythonコード開発のみ) Wheelのインストール リポジトリのクローン 起動確認 Pythonコードの改変 デバッガを使ったOSSのコードリーディングのススメ 🧩 vLLMのソフトウェアアーキテクチャ オンライン推論 : FastAPIサーバの立ち上げとEngineClientの生成 1. Engin
Happy New Year everyone! In late December 2023 (Christmas Day to be precise), CPython core developer Brandt Bucher submitted a little pull-request to the Python 3.13 branch adding a JIT compiler. This change, once accepted would be one of the biggest changes to the CPython Interpreter since the Specializing Adaptive Interpreter added in Python 3.11 (which was also from Brandt along with Mark Shann
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 input, and every tool invoc
TL;DR; We are changing std::sort in LLVM’s libcxx. That’s a long story of what it took us to get there and all possible consequences, bugs you might encounter with examples from open source. We provide some benchmarks, perspective, why we did this in the first place and what it cost us with exciting ideas from Hyrum’s Law to reinforcement learning. All changes went into open source and thus I can
Suppose you have an array of floating-point numbers, and wish to sum them. You might naively think you can simply add them, e.g. in Rust: fn naive_sum(arr: &[f32]) -> f32 { let mut out = 0.0; for x in arr { out += *x; } out } This however can easily result in an arbitrarily large accumulated error. Let’s try it out: naive_sum(&vec![1.0; 1_000_000]) = 1000000.0 naive_sum(&vec![1.0; 10_000_000]) = 1
31st December 2024 A lot has happened in the world of Large Language Models over the course of 2024. Here’s a review of things we figured out about the field in the past twelve months, plus my attempt at identifying key themes and pivotal moments. This is a sequel to my review of 2023. In this article: The GPT-4 barrier was comprehensively broken Some of those GPT-4 models run on my laptop LLM pri
","eos_token":"<|return|>","pad_token":"<|endoftext|>"},"chat_template_jinja":"{#-\n In addition to the normal inputs of `messages` and `tools`, this template also accepts the\n following kwargs:\n - \"builtin_tools\": A list, can contain \"browser\" and/or \"python\".\n - \"model_identity\": A string that optionally describes the model identity.\n - \"reasoning_effort\": A string that describes t
4 Pandas Anti-Patterns to Avoid and How to Fix Them
pandas is a powerful data analysis library with a rich API that offers multiple ways to perform any given data manipulation task. Some of these approaches are better than others, and pandas users often learn suboptimal coding practices that become their default workflows. This post highlights four common pandas anti-patterns and outlines a complementary set of techniques that you should use instea
The Legends of Runeterra CI/CD Pipeline Hi, I’m Guy Kisel, and I’m a software engineer on Legends of Runeterra’s Production Engineering: Shared Tools, Automation, and Build team (PE:STAB for short). My team is responsible for solving cross-team shared client technology issues and increasing development efficiency. We focus on the areas that empower other teams to do more and protect the team from
Gamedev in Lisp. Part 1: ECS and Metalinguistic Abstraction - cl-fast-ecs by Andrew
Gamedev in Lisp. Part 1: ECS and Metalinguistic Abstraction In this series of tutorials, we will delve into creating simple 2D games in Common Lisp. The result of the first part will be a development environment setup and a basic simulation displaying a 2D scene with a large number of physical objects. It is assumed that the reader is familiar with some high-level programming language, has a gener
Internet Engineering Task Force (IETF) K. Davis Request for Comments: 9562 Cisco Systems Obsoletes: 4122 B. Peabody Category: Standards Track Uncloud ISSN: 2070-1721 P. Leach University of Washington May 2024 Universally Unique IDentifiers (UUIDs) Abstract This specification defines UUIDs (Universally Unique IDentifiers) -- also known as GUIDs (Globally Unique IDentifiers) -- and a Uniform Resou
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,
CUPID: for joyful coding
What started as lighthearted iconoclasm, poking at the bear of SOLID, has developed into something more concrete and tangible. If I do not think the SOLID principles are useful these days, then what would I replace them with? Can any set of principles hold for all software? What do we even mean by principles? I believe that there are properties or characteristics of software that make it a joy to
Golang Mini Reference 2022: A Quick Guide to the Modern Go Programming Language (REVIEW COPY)
Golang Mini Reference 2022 A Quick Guide to the Modern Go Programming Language (REVIEW COPY) Harry Yoon Version 0.9.0, 2022-08-24 REVIEW COPY This is review copy, not to be shared or distributed to others. Please forward any feedback or comments to the author. • feedback@codingbookspress.com The book is tentatively scheduled to be published on September 14th, 2022. We hope that when the release da
","chat_template":[{"name":"default","template":"{{ bos_token }}{% if messages[0]['role'] == 'system' %}{% set loop_messages = messages[1:] %}{% set system_message = messages[0]['content'] %}{% elif false == true %}{% set loop_messages = messages %}{% set system_message = 'You are Command-R, a brilliant, sophisticated, AI-assistant trained to assist human users by providing thorough responses. You
Agent Development Kit: Making it easy to build multi-agent applications- Google Developers Blog
Agent Development Kit: Making it easy to build multi-agent applications The world of AI is rapidly moving beyond single-purpose models towards intelligent, autonomous multi-agent systems. Building these multi-agent systems, however, presents new challenges. That is why today, we have introduced Agent Development Kit (ADK) at Google Cloud NEXT 2025, a new open-source framework from Google designed
Parsing SQL - Strumenta
The code for this tutorial is on GitHub: parsing-sql SQL is a language to handle data in a relational database. If you worked with data you have probably worked with SQL. In this article we will talk about parsing SQL. It is in the same league of HTML: maybe you never learned it formally but you kind of know how to use it. That is great because if you know SQL, you know how to handle data. However
Most of my readers are probably familiar with procedural programming, object-oriented programming (OOP), and functional programming (FP). The majority of top programming languages on all of the language popularity charts (like TIOBE) support all three to some extent. Even if a programmer avoided one or more of those three paradigms like the plague, they’re likely at least aware of them and what th
Masato Hagiwara Open in Recto Pad Google Colab Github Recto Pad TL;DR Recto is a 2D programming language that uses nested rectangles as its core syntax, encoding structure and recursion directly in space instead of a linear stream of text. Recto explores new ways to write, parse, and reason about code—and even natural language—spatially. Introduction Open in Recto Pad Virtually all the languages w
I thought it would be fun to go outside of my comfort zone of web development topics and write about something completely different and new, something I have never written about before. So today, I'm going to show you how to implement a programming language! The project will parse and execute programs written in a simple language I called my (I know it's a lame name, but hey, it is "my" language).
Show navigation A recent article on WebAssembly Garbage Collection (WasmGC) explains at a high level how the Garbage Collection (GC) proposal aims to better support GC languages in Wasm, which is very important given their popularity. In this article, we will get into the technical details of how GC languages such as Java, Kotlin, Dart, Python, and C# can be ported to Wasm. There are in fact two m
Over the course of my Spring 2020 semester at Harvey Mudd College, I developed a self-hosting compiler entirely from scratch. This article walks through many interesting parts of the project. It’s laid out so you can just read from beginning to end, but if you’re more interested in a particular topic, feel free to jump there. Or, take a look at the project on GitHub. Table of contents What the pro
Patterns for Building LLM-based Systems & Products [ llm engineering production 🔥 ] · 66 min read Discussions on HackerNews, Twitter, and LinkedIn “There is a large class of problems that are easy to imagine and build demos for, but extremely hard to make products out of. For example, self-driving: It’s easy to demo a car self-driving around a block, but making it into a product takes a decade.”
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Minimal safe Bash script template
Building a tiny Linux from scratch
Agentic Coding Recommendations
IAM ロールで 100 連鎖してみた | DevelopersIO
PythonとRustの融合：PyO3/maturinを使ったPythonバインディングの作成入門 | gihyo.jp
The Prompt Engineering Playbook for Programmers
GPT in 60 Lines of NumPy | Jay Mody
Writing a C compiler in 500 lines of Python
How I Use Every Claude Code Feature
Functional programming is finally going mainstream
Prototyping in Rust | corrode Rust Consulting
📖 vLLMのコードを読んでみよう - ENGINEERING BLOG ドコモ開発者ブログ
Python 3.13 gets a JIT
Tools: Code Is All You Need
Changing std::sort at Google’s Scale and Beyond
Taming Floating-Point Sums | orlp.net
Things we learned about LLMs in 2024
openai/gpt-oss-120b · Hugging Face
The Legends of Runeterra CI/CD Pipeline
RFC 9562: Universally Unique IDentifiers (UUIDs)
CohereLabs/c4ai-command-r-plus · Hugging Face
Implementing Logic Programming
Recto — a truly 2D language
Building a Toy Programming Language in Python
A new way to bring garbage collected programming languages efficiently to WebAssembly · V8
Kalyn: a self-hosting compiler for x86-64
Patterns for Building LLM-based Systems & Products