Published Apr 18, 2025 Claude Code is a command line tool for agentic coding. This post covers tips and tricks that have proven effective for using Claude Code across various codebases, languages, and environments. We recently released Claude Code, a command line tool for agentic coding. Developed as a research project, Claude Code gives Anthropic engineers and researchers a more native way to int
Google Chromeのヘッドレスモードが新しく。別になっていた実装を統合し、ヘッドフルと完全互換に Google Chromeの開発チームは、Google Chromeをユーザーインターフェイス画面なしで利用できるヘッドレスモードの実装が新しくなったことを明らかにしました。 Chrome’s Headless mode just got a whole lot better! We made Headless more useful for developers by bringing it closer to Chrome’s regular “headful” mode. https://t.co/FhAblWvJQj pic.twitter.com/tJHV0j9fc7 — Chrome Developers (@ChromiumDev) February 22, 2023 ヘ
AI Agentの叛逆により、ホームディレクトリを破壊された人が話題となった。LLM無職を差し置いてLLMホームレスである。 ん？え？は？何してるの？ pic.twitter.com/QaDkToek4P— /mugisus/g (@mugisus) 2025年7月1日 かわいそうに。AIはこういうとき全く躊躇なく余計なことをする*1ので、自分も閉口することがある。明日は我が身ということで、叛逆に備える方法を探る必要がある。 ところで、環境の隔離というと最近はすぐコンテナが出てくるけれど、コンテナみたいな大仰なものを使わなくとも、実行するプロセスに強制的なアクセス制御をかけて特定のディレクトリにしか書き込めないようにするグッズがいろいろあって、例えばSELinuxやAppArmorといったソフトウェアを利用できる。これらは多くのディストリビューションにデフォルトで入っており、人知れずお前ら
Harness design for long-running application development
Published Mar 24, 2026 Harness design is key to performance at the frontier of agentic coding. Here's how we pushed Claude further in frontend design and long-running autonomous software engineering. Written by Prithvi Rajasekaran, a member of our Labs team. Over the past several months I’ve been working on two interconnected problems: getting Claude to produce high-quality frontend designs, and g
時雨堂クラウドサービスを支える技術 v1
v2 へ移行中です 円安の影響や、自社製品がスケールアウトに対応したこと、Cloudflare LB の WebSocket の挙動が残念だったことなどを踏まえ、サービス構成を変更を検討中です。 脱 Vultr Egress 料金が Linode だと Vultr の半額 Linode へ移行 脱 Cloudflare LB Linode の NodeBalancers へ移行 マルチリージョンでの利用は Linode の Akamai Global Load Balancer 公開待ち 脱 Cloudflare サポートに不安があるため Akamai へ移行 脱 TimescaledB 移行は Linode PostgreSQL の提供開始待ち OLAP は DuckDB + S3 互換オブジェクトストレージへ移行 ログ保存は VictoriaLogs へ移行予定 脱 DataPacke
Announcing a new IDE for PostgreSQL in VS Code from Microsoft | Microsoft Community Hub
Announcing a new IDE for PostgreSQL in VS Code from Microsoft We are excited to announce the public preview of the brand-new PostgreSQL extension for Visual Studio Code (VS Code), designed to simplify PostgreSQL database management and development workflows. With this extension, you can now manage database objects, draft queries with intelligent assistance from context-aware IntelliSense and our ‘
Today we’re excited to announce the release of TypeScript 5.0! This release brings many new features, while aiming to make TypeScript smaller, simpler, and faster. We’ve implemented the new decorators standard, added functionality to better support ESM projects in Node and bundlers, provided new ways for library authors to control generic inference, expanded our JSDoc functionality, simplified con
ソフトウェア開発の世界は日々進化していますね。その中で、私たち開発者が使うツールは、まさに職人の道具のように大切なもの。常により良い方法を探し求めているのは、皆さん同じではないでしょうか。 そんな私たちの前に現れたのが、Zedです。このエディタ、一見するとただの新顔に思えるかもしれません。でも、その中身は、私のようなVimmerの心をしっかりと掴みました。なぜならZedは、Vimの精神や操作感を大切にしながら、現代のテクノロジーを駆使して作られているからです。 私は1年ほど前からZedを使い始め、すぐにルックやデザイン、全ての動作が期待通りかつ、速く完了する様子に魅了され、使い続けています。 筆者のZedのキャプチャ 機能的にはVSCodeが優れているし、AI Code EditorのCursorも盛り上がっていますが、もっと速く、たくさんコードを書きたい開発者の方にはZedという選択肢が
Vibe coding with GitHub Copilot: Agent mode and MCP support rolling out to all VS Code users
Allow us to reintroduce ourselves: GitHub Copilot is getting a whole lot more agentic with increased context of your tools and services, powered by the world’s leading models, starting today. 👏 We are excited to roll out agent mode in Visual Studio Code to all users, now complete with MCP support that unlocks access to any context or capabilities you want. What’s more, we are thrilled to release
The new wave of React state managementUnderstand the core problems state management libraries need to solve. And how the proliferation of modern libraries address them in new ways. IntroductionAs React applications grow in size and complexity, managing shared global state is challenging. The general advice is to only reach for global state management solutions when needed. This post will flesh out
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
Simple.css Framework
Are you using Simple.css? If you are, it would be great if you considered buying me a coffee to say thanks. Things like this really help open source software thrive. You can Buy Me A Coffee or even sponsor me on GitHub. ❤️ Simple.css is a CSS framework that makes semantic HTML look good, really quickly. Simple.css is mostly classless, which means that you can integrate Simple.css with plain HTML a
要約 Googleが検索結果スクレイピングツールへの対策を強化し、一部のSEO分析ツールが影響を受けることが明らかになりました。Googleが検索サービス利用時に JavaScriptが有効になっていることを求めるよう仕様変更したためと考えられます。順位取得ツールの選定ではベンダー各社の「復旧スピード」「顧客との連携」「技術基盤」が重要です。 障害まとめメモ 障害内容：検索順位計測ツールがGoogle検索における検索順位を取得できない 発生日時：日本時間 2025年1月16～17日頃より 原因：Google検索がJavaScriptが有効でないクライアントに検索結果を返さないため（bot対策が強化された） 影響範囲：サードパーティーの順位計測ツールやスクレイピングツールの一部 要約 障害まとめメモ Googleがbot対策を強化、スクレイピングや順位取得ツールをブロック 検索結果スクレイピ
Email for agents - Cloudflare Email Service now in public beta
Cloudflare Email Service: now in public beta. Ready for your agents2026-04-16 Email is the most accessible interface in the world. It is ubiquitous. There’s no need for a custom chat application, no custom SDK for each channel. Everyone already has an email address, which means everyone can already interact with your application or agent. And your agent can interact with anyone. If you are buildin
Chat for Claude Code - Visual Studio Marketplace
🚀 Claude Code Chat - Beautiful Claude Code Chat Interface for VS Code No more terminal commands. Chat with Claude Code through a beautiful, intuitive interface right inside VS Code. Ditch the command line and experience Claude Code like never before. This extension brings a stunning chat interface directly into your editor, making AI assistance accessible, visual, and enjoyable. 🤖 Built by Claud
macOS Internals
macOS Internals.md macOS Internals Understand your Mac and iPhone more deeply by tracing the evolution of Mac OS X from prelease to Swift. John Siracusa delivers the details. Starting Points How to use this gist You've got two main options: Under Highlights, read all the links you're interested in, or Use "OS X Reviewed" as an index and just read all the reviews end to end. (This is not the fast o
Nikkei Advent Calendar 2023の 14 日目は IDE がやっていきます。いま Web チーム内の基盤改善を専門とするチームで活動しています。自分が入社するより前に作られてメンテナンスがあまりされていなかったシステムを、現代でも戦えるようにするお仕事をしています。メンテナンスを放置することはセキュリティ的によくないので、メンテナンスを専業で行っています。最近の自分の仕事は、今日紹介する rnikkei と呼ばれるマイクロサービス群の Node.js バージョンを、v12 から v18(一部は v20) まで引き上げることです。この rnikkei は当初「爆速の日経」と呼ばれていた頃に設計・実装されたサービスです。今日はそのような過去に作られたサービスにもう一度スポットライトを当ててみようと思います。 see: https://marketing.itmedia.c
Cloudflare has a vast API surface. We have over 100 products, and nearly 3,000 HTTP API operations. Increasingly, agents are the primary customer of our APIs. Developers bring their coding agents to build and deploy applications, agents, and platforms to Cloudflare, configure their account, and query our APIs for analytics and logs. We want to make every Cloudflare product available in all of the
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
Introduction GPT-5.1, our newest flagship model, is designed to balance intelligence and speed for a variety of agentic and coding tasks, while also introducing a new none reasoning mode for low-latency interactions. Building on the strengths of GPT-5, GPT-5.1 is better calibrated to prompt difficulty, consuming far fewer tokens on easy inputs and more efficiently handling challenging ones. Along
Tauri 2.0 Stable Release
We are very proud to finally announce the stable release for the new major version of Tauri. Welcome to Tauri 2.0! What is Tauri? In a Tauri application the frontend is written in your favorite web frontend stack. This runs inside the operating system WebView and communicates with the application core written mostly in Rust. When Should I Use Tauri? If you check any of the boxes below, you should
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
WebKit Features in Safari 16.4
Mar 27, 2023 by Patrick Angle, Marcos Caceres, Razvan Caliman, Jon Davis, Brady Eidson, Timothy Hatcher, Ryosuke Niwa, and Jen Simmons ContentsWeb Push on iOS and iPadOSImprovements for Web AppsWeb ComponentsCSSHTMLJavaScript and WebAssemblyWeb APIImages, Video, and AudioWKWebViewDeveloper ToolingWeb InspectorSafari Web ExtensionsSafari Content BlockersNew Restrictions in Lockdown ModeMore Improve
Ultimate Guide to Visual Testing with Playwright February 28, 2024 As your web app matures, it becomes challenging to ensure your GUI doesn’t break with any given update. There are a lot of browsers and devices, and countless states for every one of your components. Unit tests ensure your code remains consistent, and E2E tests will ensure your system remains consistent, but neither will catch visu
Amazon Aurora MySQL 3 with MySQL 8.0 compatibility is now generally available | Amazon Web Services
AWS Database Blog Amazon Aurora MySQL 3 with MySQL 8.0 compatibility is now generally available Amazon Aurora is a MySQL and PostgreSQL-compatible relational database built for the cloud. Aurora combines the performance and availability of traditional enterprise databases with the simplicity and cost-effectiveness of open-source databases. Amazon Aurora MySQL is compatible with MySQL 5.6 and MySQL
テックリード @ 株式会社カケハシ 医療SaaSの共通基盤を開発。TypeScriptと関数型プログラミングで堅牢なシステム設計を実践。 SDDの「仕様」とは何を指しているのか 仕様駆動開発が話題です。Kiro、OpenSpec、Spec Kitといったツールが登場し、Martin Fowlerのブログでも詳細に分析されています。 一方で、「仕様」という言葉が指す範囲が人によって異なるし、どのようなプロダクトを想定しているかが人によって異なるから、SDDの是非を巡る議論は空中戦になりがちです。 各ツールの定義を確認してみます。 Martin Fowlerの記事では、「仕様」を次のように定義しています。 A structured, behavior-oriented artifact - or a set of related artifacts - written in natural l
Announcing TypeScript Native Previews - TypeScript
This past March we unveiled our efforts to port the TypeScript compiler and toolset to native code. This port has achieved a 10x speed-up on most projects – not just by using a natively-compiled language (Go), but also through using shared memory parallelism and concurrency where we can benefit. Since then, we have made several strides towards running on large complex real-world projects. Today, w
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
こんにちは。Platform Team の tobi (@iam__tobi) です。 本記事では feature flag の基礎的事項の説明と、Platform Team で開発してきた newmo 独自の feature flag 基盤の設計思想と全貌について二段構成でご紹介します。 これから feature flag を導入しようと考えている方にとって参考になれば幸いです。 背景・概要 feature flag 入門 feature flag の概要 feature flag の構成要素 Toggle Point Toggle Router Toggle Context Toggle Configuration feature flag の種類 Release Toggles Experiment Toggles Ops Toggles Permission Toggles Ope
And I think you’ll love it. I focused on several areas: Improved UI and user experience Faster performance Useful features Updated documentation For Mac users, Native Apple Silicon (ARM – M1, M2) compatibility Download Modern CSV 2 If that’s all you need to know, you can buy a license here. Or if you already have a version 1 license, you can upgrade here. For those that need more details, here you
What's New In DevTools (Chrome 94) | Blog | Chrome for Developers
Use DevTools in your preferred language Chrome DevTools now supports more than 80 languages, allowing you to work in your preferred language! Open Settings, then select your preferred language under the Preferences > Language dropdown and reload DevTools. Preferences" width="800" height="494"> Chromium issue: 1163928 New Nest Hub devices in the Device list You can now simulate the dimensions of Ne
@Hiroki__IT が目の前にやってきて私にIstioのこと教えてくれた。- Istio in Action の読書感想文 - じゃあ、おうちで学べる
はじめに マイクロサービスアーキテクチャの台頭により、サービスメッシュ技術は現代のクラウドネイティブ環境において外せない選択肢の一つとなっています。 その理由は明確です。マイクロサービスに求められる非機能要件の多くは類似しており、これをアプリケーション側で個別に実装すると、開発者やインフラエンジニアの負担が増大するからです。 ここで登場するのがサービスメッシュです。サービスメッシュの採用により、これらの非機能要件をインフラ層で一元管理することが可能となり、アプリケーション開発者とインフラエンジニアの責務を明確に分離できます。つまり、各エンジニアが自身の専門領域にフォーカスできるのです。これは単なる効率化ではなく、イノベーションを加速させるためサービス開発する上での労苦をなくします。 そして、サービスメッシュの世界で圧倒的な存在感を放っているのがIstioです。その包括的な機能と広範な採用で
Figma for VS Code - Visual Studio Marketplace
Launch VS Code Quick Open (Ctrl+P), paste the following command, and press enter. Streamline your design to code workflow with Figma for VS Code Figma for VS Code lets you navigate and inspect design files, collaborate with designers, track changes, and speed up implementation - all without leaving your text editor. Improve developer productivity by eliminating the context switching and busy work
Mojo may be the biggest programming language advance in decades – fast.ai
I remember the first time I used the v1.0 of Visual Basic. Back then, it was a program for DOS. Before it, writing programs was extremely complex and I’d never managed to make much progress beyond the most basic toy applications. But with VB, I drew a button on the screen, typed in a single line of code that I wanted to run when that button was clicked, and I had a complete application I could now
GitHub MCP Exploited: Accessing private repositories via MCP
We showcase a critical vulnerability with the official GitHub MCP server, allowing attackers to access private repository data. The vulnerability is among the first discovered by Invariant's security analyzer for detecting toxic agent flows. Invariant has discovered a critical vulnerability affecting the widely-used GitHub MCP integration (14k stars on GitHub). The vulnerability allows an attacker
PacketProxyで探るGemini CLIのコンテキストエンジニアリング 〜AIエージェントを信頼できる相棒に〜 | BLOG - DeNA Engineering
2025.07.18 技術記事 PacketProxyで探るGemini CLIのコンテキストエンジニアリング 〜AIエージェントを信頼できる相棒に〜 by akira.kuroiwa #gemini-cli #ai #security #ai-agent #context-engineering #packetproxy 「なんかよく分からないけど、すごい」で終わらせないために こんにちは、DeNA セキュリティ技術グループの 黒岩 亮 ( @kakira9618 ) です。 AIエージェント、とくに Gemini CLI のようなコーディングを支援してくれるツールは非常に強力で、私たちの開発体験を大きく変えようとしています。しかし、その一方で、こんな風に感じたことはありませんか？ 「このファイルの情報、勝手にAIに送られたりしない？ 大丈夫かな？」 と、情報管理・セキュリティ面で漠然と
One of the most impactful things we’ve worked on in TypeScript 5.0 isn’t a feature, a bug fix, or a data structure optimization. Instead, it’s an infrastructure change. In TypeScript 5.0, we restructured our entire codebase to use ECMAScript modules, and switched to a newer emit target. What to Know Now, before we dive in, we want to set expectations. It’s good to know what this does and doesn’t m
I recently realized stdout is much faster than stderr for Rust. Here are my findings after diving deep into this rabbit hole. I have been using the terminal (i.e. command-line) for most of my day-to-day things for a while now. I was always fascinated by the fact that how quick and convenient the command-line might be and that's why I'm a proponent of using CLI (command-line) or TUI (terminal user
With pen and paper, anyone can write a journal entry, draw a diagram, perform a calculation, or sketch a cartoon. Digital tablets like the iPad or reMarkable can adapt pen and paper into the world of digital media. In doing so, they trade away some of paper’s advantages like cheapness and tangibility. In exchange, we get new computational powers like nondestructive editing and ease of transmission
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
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Claude Code Best Practices
Google Chromeのヘッドレスモードが新しく。別になっていた実装を統合し、ヘッドフルと完全互換に
Claude Code くんのホームディレクトリ破壊を AppArmor で阻止する - Lambdaカクテル
Announcing TypeScript 5.0 - TypeScript
Vimの操作感を愛おしむ人たちへ: Zedで広がる新たな可能性 - ROUTE06 Tech Blog
The new wave of React state management
Agentic Coding Recommendations
Google、検索結果のスクレイピングツール対策を強化、順位取得ツールなどに影響 - SEMリサーチ
Express と handlebars で動き続ける日経 — HACK The Nikkei
Building a CLI for all of Cloudflare
The Prompt Engineering Playbook for Programmers
GPT-5.1 Prompting Guide
Ultimate Guide to Visual Testing with Playwright
仕様について考える前に要求分析をしよう
The Linux Kernel Module Programming Guide
feature flag 入門と newmo の feature flag 基盤について - newmo 技術ブログ
Modern CSV 2 is now available.
TypeScript's Migration to Modules - TypeScript
Why stdout is faster than stderr? - Orhun's Blog
Inkbase: Programmable Ink