日本株3700社以上を分析。yfinance x「わが投資術」株式スクリーニングアプリを作った話（バイブコーディング）
いきなりですが。 海外旅行したり働き始めたりすると、日本の良さが身に染みたと感じた人は多いんじゃないでしょうか？ なんかとりあえず外で働いてみたいと思っていましたが、今はいつ戻るかと考える日々です。（とにかく温泉に入りたい） また色々と各国を回る中で、日本企業ってアジア圏や他の国にもかなり進出してるんだなぁと実感しました。（そりゃそう） そんなこんなで日本株に興味を持ち 昨年にわが投資術を購入して実践し始めました。（まだ初めて一年目なので成績はわかりません。。。が、マイナスは無し） 自分でバフェットコードや Claude mcp-yfinance などを利用しながらスクリーニングしてみましたが、毎回決算が出るたびに手動とチャット相手にあるのも何かなぁ。と思いまして。 じゃあ自動収集とスクリーニング用のアプリ作ってみよう(vibe coding) そんなノリから、日本株全銘柄を自動収集・簡易
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
Easily the biggest question we get asked is something like: How is Remix different from Next.js? It appears we have to answer this question! We'd like to address it directly and without drama. If you're a fan of Remix and want to start tweeting smug reactions to this article, we kindly ask that you drop the smugness before hitting the tweet button 🤗. A rising tide lifts all boats. We've been frie
テクノロジー部門CTO室の笹田（ko1）と遠藤（mame）です。今年の 9 月から STORES 株式会社で Ruby (MRI: Matz Ruby Implementation、いわゆる ruby コマンド) の開発をしています（Rubyのこれからを STORES で作る。Rubyコミッター笹田さん、遠藤さんにCTOがきく「Fun」｜STORES People ）。お金をもらって Ruby を開発しているのでプロの Ruby コミッタです。 本日 12/25 に、恒例のクリスマスリリースとして、Ruby 3.3.0 がリリースされました（Ruby 3.3.0 リリース）。クックパッド開発者ブログで連載していたように、今年も STORES Product Blog にて Ruby 3.3 の NEWS.md ファイルの解説をします（ちなみに、STORES Advent Calendar
技術部の笹田（ko1）と遠藤（mame）です。クックパッドで Ruby (MRI: Matz Ruby Implementation、いわゆる ruby コマンド) の開発をしています。お金をもらって Ruby を開発しているのでプロの Ruby コミッタです。 昨日 12/25 に、恒例のクリスマスリリースとして、Ruby 3.2.0 がリリースされました（Ruby 3.2.0 リリース）。今年も Ruby 3.2 の NEWS.md ファイルの解説をします。NEWS ファイルとは何か、は以前の記事を見てください。 プロと読み解く Ruby 2.6 NEWS ファイル - クックパッド開発者ブログ プロと読み解くRuby 2.7 NEWS - クックパッド開発者ブログ プロと読み解くRuby 3.0 NEWS - クックパッド開発者ブログ プロと読み解く Ruby 3.1 NEWS -
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
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
GitHub API を使ったリポジトリの監査を始めました - Techtouch Developers Blog
ヒアリングから見えた課題 定義したブランチ保護ルール GitHub API を利用した監査スクリプトの作成 終わりに こんにちは。SRE チームの izzii です。 つい先日、テックタッチでは GitHub リポジトリの利用ポリシーを定めました。創業から数年間、アクセル全開で開発して気がついたら、Owner 権限を持つ人間が増えてしまっていたことへの違和感を解消するためです。 ヒアリングを通して問題を分析し、リポジトリ利用ポリシーを定め、最終的には GitHub API を使って監査結果を Slack に通知する仕組みを作りました。 本記事はあくまで「リポジトリの利用ポリシー」の話に閉じます。GitHub の利用全般に及ぶ話に興味がある方は、Flatt Security さんが最近公開されたスライドが良さげなのでオススメしておきます。 https://blog.flatt.tech/en
Gemini CLI が切り拓く！待望のエージェントモード(Agent Mode)が Gemini Code Assist に！ 【紹介編】
はじめに こんにちは、Google Cloud のアプリケーションモダナイゼーションスペシャリストの関本です。 「こんなアプリが欲しいわあ、せや作ったろ」 という気持ち(ノリ、Vibes)から AI エージェントを活用してさっとコーディングを始める――そんな未来の開発スタイルを体現する、エージェントベースの開発ツールが今、大きな注目を集めていますよね！Vibe Coding とか Agentic Coding というキーワードを耳にしている方も多いと思います。 また、これを読まれている方の多くは、おそらく何かしらのツールを使ったことがある人がほとんどではないでしょうか。この強力な機能が Gemini Code Assist にもついにやってきました！その名も 「エージェントモード(Agent Mode)」 です。 本記事では、この「エージェントモード」の基本から、ゼロからアプリケーションを
6 Weeks of Claude Code
It is wild to think that it has been only a handful of weeks. Claude Code has considerably changed my relationship to writing and maintaining code at scale. I still write code at the same level of quality, but I feel like I have a new freedom of expression which is hard to fully articulate. Claude Code has decoupled myself from writing every line of code, I still consider myself fully responsible
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
CTO室SREの @sinsoku です。 ドキュメントをテックブログとして書いておくと一石二鳥なことに気づいたので、ここに書きます。 GitHub Appsが必要なユースケース GitHub Actions で使用できる secrets.GITHUB_TOKEN には以下の制限があります。 secrets.GITHUB_TOKEN を使用した操作では新しいワークフローが実行されません Actions で作成したプルリクで Actions のテストが動かない 他リポジトリのコードを参照できません プライベートリポジトリのgemやnpmの取得ができない この問題を回避するため、GitHub Appsで一時的なアクセストークンを生成して使用します。 なぜ Personal Access Token（PAT）を使うべきではないか？ PATを使用することは以下の理由から推奨していません。 PATを
Why I (finally) switched to urql from Apollo Client - LogRocket Blog
Alec Brunelle Alec is a web developer who loves to work in all areas of the stack. Currently hacking on GraphQL services at Unity Technologies. Using GraphQL in your frontend application is a like playing a different ball game than when using REST. Client libraries such as urql, Apollo Client, and Relay are able to offer different capabilities than REST libraries such as Axios or fetch. How come?
NotGitBleed - TL;DR
NotGitBleed - TL;DR Due to configuration errors or human error, significant numbers of people may have accidentally checked GitHub credentials into GitHub commits as metadata, most commonly a username as the author name and a password in the email address field. We estimate in the region of 50,000 to 100,0001 user credentials may have been affected covering a wide range of organisations including
Today Gleam v1.0.0 has been released! This is the first "stable" release of the language (more on what that means later) and a big milestone for the ecosystem. It has been a long journey and I'm proud of both the technology and the community that we've built here with Gleam. Thank you so much to everyone who has taken part in any way, you've all contributed to the project getting here in meaningfu
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
Update 1.82.1: The update addresses this security issue. Update 1.82.2: The update addresses these issues. Update 1.82.3: The update addresses this security issue. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the August 2023 release of Visual Studio Code. There are many updates in this version that we hope you'll like, some of the key hi
SemVer in Rust: Tooling, Breakage, and Edge Cases — FOSDEM 2024 Last month, I gave a talk titled "SemVer in Rust: Breakage, Tooling, and Edge Cases" at the FOSDEM 2024 conference. The talk is a practical look at what semantic versioning (SemVer) buys us, why SemVer goes wrong in practice, and how the cargo-semver-checks linter can help prevent the damage caused by SemVer breakage. TL;DR: SemVer is
Bridgetown: Next-Generation Progressive Site Generator
Skip to main content A next-generation, progressive site generator & fullstack framework, powered by Ruby. Built upon venerated open source languages & technologies such as Ruby, Puma, Roda, and esbuild, Bridgetown puts power back in the hands of individuals to create extraordinary things. While your competitors are wrestling with complicated build tools, limited programming idioms, and mountains
The Architecture of a Modern Startup | by Dmitry Kruglov | Nov, 2022 | Better Programming
workflow — all images by authorThe Tech side of startups can sometimes be very fluid and contain a lot of unknowns. What tech stack to use? Which components might be overkill for now but worth keeping an eye on in the future? How to balance the pace of business features development while keeping the quality bar high enough to have a maintainable codebase? Here I want to share our experience buildi
Update 1.86.2: The update addresses these issues. Update 1.86.1: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the January 2024 release of Visual Studio Code. There are many updates in this version that we hope you'll like, some of the key highlights include: Per-window zoom levels - Adjust the zoom leve
The state of HTTP clients, or why you should use httpx · honeyryder
The state of HTTP clients, or why you should use httpx 15 Oct 2023 TL;DR most http clients you’ve been using since the ruby heyday are either broken, unmaintained, or stale, and you should be using httpx nowadays. Every year, a few articles come out with a title similar to “the best ruby http clients of the year of our lord 20xx”. Most of the community dismisses them as clickbait, either because o
Using S3 as a container registry a.k.a. Waiter, there's a whale in my bucket! 03 Jul, 2024 For the last four months I’ve been developing a custom container image builder, collaborating with Outerbounds1. The technical details of the builder itself might be the topic of a future article, but there’s something surprising I wanted to share already: you can use S3 as a container registry! You heard it
New AWS Security Agent secures applications proactively from design to deployment (preview) | Amazon Web Services
AWS News Blog New AWS Security Agent secures applications proactively from design to deployment (preview) Updated on March 31, 2026 – AWS Security Agent on-demand penetration testing is now generally available. New customers can explore AWS Security Agent with a 2-month free trial. — Today, we’re announcing AWS Security Agent in preview, a frontier agent that proactively secures your applications
I see a lot of bad system design advice. One classic is the LinkedIn-optimized “bet you never heard of queues” style of post, presumably aimed at people who are new to the industry. Another is the Twitter-optimized “you’re a terrible engineer if you ever store booleans in a database” clever trick1. Even good system design advice can be kind of bad. I love Designing Data-Intensive Applications, but
I often see the question "What’s the best Node.js framework?" crop up on message boards and social media. The replies tend to be full of strong opinions. Some developers will even get into arguments about it. If you’re trying to figure out the right framework for your project, none of this is going to be much help. With lots of frameworks to choose from, and all those strong opinions, it’s easy to
Update 1.60.1: The update addresses these issues. Update 1.60.2: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the August 2021 release of Visual Studio Code. There are many updates in this version that we hope you will like, some of the key highlights include: Automatic language detection - Programming l
PhobosLab
high_impact tl;dr: high_impact is small game engine for 2D action games. It's written in C, compiles to Windows, Mac and Linux as well as to WASM for the Web. It's “inspired by” my original Impact JavaScript game engine from 2010. The name high_impact is a nod to a time when C was considered a high level language. MIT licensed, source on github: github.com/phoboslab/high_impact Video from my tweet
Exactly ten years ago today, we published "Why We Created Julia", introducing the Julia project to the world. At this point, we have moved well past the ambitious goals set out in the original blog post. Julia is now used by hundreds of thousands of people. It is taught at hundreds of universities and entire companies are being formed that build their software stacks on Julia. From personalized me
Adopting Wide Event-style instrumentation has been one of the highest-leverage changes I've made in my engineering career. The feedback loop on all my changes tightened and debugging systems became so much easier. Systems that were scary to work on suddenly seemed a lot more manageable. Lately there have been a lot of good blog posts on what "Wide Events" mean and why they are important. Here are
Awesome Terraform | Curated list of awesome lists | Project-Awesome.org
A curated list of resources on HashiCorp's Terraform. Your contributions are welcome! Terraform enables you to safely and predictably create, change, and improve production infrastructure. It is an open source tool that codifies APIs into declarative configuration files that can be shared amongst team members, treated as code, edited, reviewed, and versioned. Contents Legend Official Resources Com
Pull Request のレビュー完了までの時間を短くするため、Slack にレビュー待ち Pull Request のリンクを通知するようにしたので、実施した内容を紹介する。 この記事では、Slack の通知設定は済んでいることを前提としている。 どのようなものを作りたいと思ったのか レビューが放置されることを避けたい。かと言って、通知が多いのもアテンションを奪われるので避けたい。 ということで、定期実行で日に数回、Slack に Pull Request を通知してみることにした。 通知内容はその時点でレビュー待ちとなっている Pull Request をリンクにしたものとし、通知頻度はまず、朝 9 時と夕方 17 時に設定した。 また、オープンされて何日放置されているかもわかるようにしたいという要望があったのでそれも表現できるものにしたいと考えた。 actions/github-s
What’s new in Flutter 3.3
Exciting updates for text handling, performance improvements, and more! Welcome to Flutter 3.3! Only three months ago we announced Flutter 3, a massive milestone that included stable support for all platforms! The good news is that the momentum since this major release has not slowed down. Since the release of Flutter 3, Flutter has merged 5,687 pull requests. This release brings updates to Flutte
Elder.js: An SEO-First Svelte-Based Framework Star Elder.js is an opinionated static site generator and web framework built with SEO in mind. (Supports SSR and Static Site Generation.) Features: Build hooks allow you to plug into any part of an entire page generation process and customize as needed. A Highly Optimized Build Process: that will span as many CPU cores as you can throw at it to make b
CamoLeak: Critical GitHub Copilot Vulnerability Leaks Private Source Code
Get details on our discovery of a critical vulnerability in GitHub Copilot Chat. TL;DR: In June 2025, I found a critical vulnerability in GitHub Copilot Chat (CVSS 9.6) that allowed silent exfiltration of secrets and source code from private repos, and gave me full control over Copilot’s responses, including suggesting malicious code or links. The attack combined a novel CSP bypass using GitHub’s
Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Update 1.72.1: The update addresses these security issues. Update 1.72.2: The update addresses these issues. Welcome to the September 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: Tool bar customization - Hide/show
Using AWS security services to protect against, detect, and respond to the Log4j vulnerability | Amazon Web Services
AWS Security Blog Using AWS security services to protect against, detect, and respond to the Log4j vulnerability April 21, 2022: The blog post has been updated to include information on the updated version of the hotpatch. See this security advisory for more details. Overview In this post we will provide guidance to help customers who are responding to the recently disclosed log4j vulnerability. T
CI/CD Observability with OpenTelemetry - A Step by Step Guide In the fast-paced world of CI/CD, understanding the performance and behaviour of your pipelines is crucial. GitHub Actions has become a popular choice for automating builds and deployments, but anyone who's debugged a flaky workflow or long-running job knows how challenging it can be to get visibility into what's happening under the hoo
matduggan.com
Around 2012-2013 I started to hear a lot in the sysadmin community about a technology called "Borg". It was (apparently) some sort of Linux container system inside of Google that ran all of their stuff. The terminology was a bit baffling, with something called a "Borglet" inside of clusters with "cells" but the basics started to leak. There was a concept of "services" and a concept of "jobs", wher
An AI-native software engineer is one who deeply integrates AI into their daily workflow, treating it as a partner to amplify their abilities. This requires a fundamental mindset shift. Instead of thinking “AI might replace me” an AI-native engineer asks for every task: “Could AI help me do this faster, better, or differently?”. The mindset is optimistic and proactive - you see AI as a multiplier
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Claude Code Best Practices
Remix vs Next.js
プロと読み解くRuby 3.3 NEWS - STORES Product Blog
プロと読み解く Ruby 3.2 NEWS - クックパッド開発者ブログ
How I Use Every Claude Code Feature
June 2022 (version 1.69)
GitHub Appsの作成とOrgへの所有権の委譲手順 - メドピア開発者ブログ
Gleam version 1 | Gleam programming language
July 2022 (version 1.70)
August 2023 (version 1.82)
SemVer in Rust: Tooling, Breakage, and Edge Cases — FOSDEM 2024
January 2024 (version 1.86)
Using S3 as a container registry
Everything I know about good system design
Guidelines for choosing a Node.js framework
August 2021 (version 1.60)
Why We Use Julia, 10 Years Later
A Practitioner's Guide to Wide Events | Jeremy Morrell
レビュー待ちの Pull Request を Slack に通知する
Elder.js: A Svelte Framework and Static Site Generator
September 2022 (version 1.72)
CI/CD Observability with OpenTelemetry - A Step by Step Guide
The AI-Native Software Engineer