記事
AI と開発者のためのシグナル
AI、プログラミング、現代のソフトウェアを形づくるエンジニアリングの変化を、実務目線で分かりやすく整理します。
注目記事
AI Coding Agents Need Verification Gates, Not Just Better Prompts 日本語ガイド
日本語の verification gates for ai coding agents ガイド: AI coding agents can write larger patches than autocomplete tools, but production teams need tests, review, sandboxing, and release gates around their output.
cURL を fetch や Axios に変換したあと、貼り付け前に確認すること
cURL からコードへの変換は便利ですが、shell quoting、重複ヘッダー、認証情報はアプリへ貼り付ける前に人間の確認が必要です。
URL query string を意味を失わずに分解・再構築する
重複パラメータ、空値、エンコード済みの入れ子 URL は parser ごとに扱いが違います。並べ替えや再エンコードの前に意味を分けて確認しましょう。
App Store & Google Play Listing Assets: Complete Guide 日本語ガイド
日本語の app store google play assets guide ガイド: A practical map of screenshots, icons, and store graphics for iOS and Android—organized around a local browser workflow.
App Store Screenshot Text & Marketing Rules 日本語ガイド
日本語の app store screenshot text and marketing rules ガイド: Practical guidance on headlines, promotional claims, Google Play text area, and CTA wording before you export.
App Store vs Google Play Screenshot Requirements 日本語ガイド
日本語の app store vs google play screenshot requirements ガイド: Side-by-side differences in sizes, formats, transparency, scaling, and marketing rules—with links to local export tools.
iOS & Android App Icon Sizes Guide 日本語ガイド
日本語の ios android app icon sizes guide ガイド: Store icons, Xcode single-size workflow, and legacy Android launcher densities—plus a local multi-size export path.
iPad App Store Screenshot Requirements 日本語ガイド
日本語の ipad app store screenshot requirements ガイド: When iPad screenshots are mandatory, which 13-inch size to export, and how Apple auto-scales smaller iPad slots.
Make App Store Screenshots Without Photoshop 日本語ガイド
日本語の make app store screenshots without photoshop ガイド: Compare Photoshop, Figma, Canva, screenshot generators, and a local browser composer for indie app launches.
How to Create App Store Screenshots from Phone Captures 日本語ガイド
日本語の create app store screenshots from phone captures ガイド: A practical local workflow for turning raw iPhone or Android captures into App Store and Google Play marketing screenshots.
How to Add a Label or Brand Overlay to an Image Locally 日本語ガイド
日本語の add label brand overlay to image locally ガイド: Add a clean badge, label, sticker, or brand overlay to an image in your browser while keeping the source file local.
Modern Favicon and PWA Icon Setup 日本語ガイド
日本語の modern favicon and pwa icon setup ガイド: Generate favicon, Apple touch icon, and PWA PNG sizes locally, then wire HTML link tags and manifest icons without uploading your logo.
Responsive Images, srcset, and WebP Workflow 日本語ガイド
日本語の responsive images srcset and webp workflow ガイド: Generate multi-width image assets locally, understand srcset and sizes, and copy picture or Next.js snippets without uploading sources.
SVG Optimization and Data URI Workflow 日本語ガイド
日本語の svg optimization and data uri workflow ガイド: Minify SVG locally, review security risks, and copy URL-encoded or Base64 Data URI snippets for CSS backgrounds and inline assets.
App Store Screenshot Size Checklist 日本語ガイド
日本語の app store screenshot size checklist ガイド: Current App Store Connect screenshot dimensions for iPhone and iPad, with a local browser workflow to crop and export before upload.
Google Play Feature Graphic Size (1024×500) 日本語ガイド
日本語の google play feature graphic size ガイド: Official Google Play feature graphic requirements and how to crop the banner locally before publishing your store listing.
How to Crop a Screenshot on Mac 日本語ガイド
日本語の how to crop a screenshot on mac ガイド: Take a screenshot on macOS, then crop it locally in the browser with fixed ratios and exact output sizes—no upload required.
Image Compression and WebP for Developers 日本語ガイド
日本語の image compression and webp for developers ガイド: Compress documentation and site images locally, convert PNG/JPEG to WebP, and understand quality, metadata, and browser limits.
What Is JSON:API? 日本語ガイド
日本語の what is json api ガイド: A practical explanation of JSON:API, how it standardizes JSON response shape, and when developers should use or avoid it.
Context Engineering for AI Agents: The Skill After Prompt Engineering 日本語ガイド
日本語の context engineering for ai agents ガイド: Context engineering is becoming a practical discipline for AI agents: selecting the right files, tools, memory, policies, and constraints before the model acts.
Small Language Models and On-Device AI Are Becoming a Real Engineering Choice 日本語ガイド
日本語の small language models on device ai ガイド: Small language models are changing AI architecture by making privacy, latency, offline use, and hybrid routing part of everyday product design.
Choosing QR Error Correction for Print and Links 日本語ガイド
日本語の qr error correction for print and links ガイド: How L, M, Q, and H trade capacity for scan reliability—and when PNG size and contrast matter more.
Cron on Kubernetes vs Linux Crontab: Timezone Traps 日本語ガイド
日本語の cron kubernetes vs linux crontab timezones ガイド: Why the same five-field cron string fires at different times on GitHub Actions, K8s CronJob, and server crontab—and how to preview safely.
HEX vs RGB vs HSL for CSS and Design Tokens 日本語ガイド
日本語の hex vs rgb vs hsl for css and design tokens ガイド: When to store hex, rgb(), or hsl() in design systems, how alpha and rounding interact, and how WCAG contrast fits the pipeline.
Regex Debugging With Fixtures, Flags, and Replace Preview 日本語ガイド
日本語の regex debugging with fixtures and flags ガイド: A practical workflow for testing regular expressions: sample lines, global and multiline flags, capture groups, and when to stop using regex.
XML Formatting for Maven, Android, and Config Files 日本語ガイド
日本語の xml formatting for maven android and config ガイド: When to validate vs format XML, how Monaco error markers help, and how XML fits next to JSON and YAML in modern repos.
API デバッグにローカルブラウザーツールが役立つ理由
ローカルブラウザーツールは、API デバッグでよくある整形、デコード、変換、比較を高速かつプライベートに進めるための作業場になります。
Base64 と URL エンコードの違い
Base64 はバイト列をテキストとして表し、URL エンコードは URL の特定部分で文字を安全に扱うための仕組みです。
Common URL Encoding Bugs in OAuth Redirects 日本語ガイド
日本語の url encoding bugs in oauth redirects ガイド: OAuth redirect bugs often come from double encoding, missing encoding, and confusing query strings with nested URLs.
Hash vs Encryption vs Encoding 日本語ガイド
日本語の hash vs encryption vs encoding ガイド: Understand when data should be hashed, encrypted, or encoded, and why these mechanisms are not interchangeable.
JSON vs YAML for Config Files 日本語ガイド
日本語の json vs yaml config files ガイド: Compare JSON and YAML for developer configuration, CI files, Kubernetes manifests, API examples, and machine-generated data.
JWT vs Session Authentication 日本語ガイド
日本語の jwt vs session authentication ガイド: Compare JWT-based authentication and server-side sessions for web apps, APIs, revocation, scalability, and debugging.
JWT のデコードと検証: 開発者が確認すべき違い
JWT をデコードすると claim は読めますが、認可に使う前には署名、発行者、audience、有効期限などの検証が必要です。
Password Rules That Make Systems Less Secure 日本語ガイド
日本語の password rules that make systems less secure ガイド: Some password policies look strict but push users toward predictable patterns, reuse, and unsafe workarounds.
Reading Timestamps in Logs Across Timezones 日本語ガイド
日本語の timestamps in logs across timezones ガイド: Learn how to compare Unix timestamps, ISO strings, UTC logs, and local times without losing the incident timeline.
UUIDs vs Auto-Increment IDs in Databases 日本語ガイド
日本語の uuid vs auto increment ids ガイド: Compare UUIDs and auto-increment IDs for public APIs, distributed systems, database indexes, and debugging workflows.
実践的な API 検証のための JSON Schema
JSON Schema を使うと、API payload の形を検証し、契約のズレを早く見つけ、手作業だけに頼らないデバッグができます。
Developer Tools for Everyday Workflows 日本語ガイド
日本語の developer tools for everyday workflows ガイド: A practical guide to choosing browser-based tools for formatting, encoding, generating, and converting everyday developer data.
Format, Encode, Generate, Validate: Choosing the Right Tool 日本語ガイド
日本語の format encode generate validate ガイド: Understand the difference between formatting, encoding, generating, and validating so you can pick the right developer tool faster.
How AI Coding Tools Are Changing Developer Workflows 日本語ガイド
日本語の how ai coding tools are changing developer workflows ガイド: AI coding tools are shifting development from manual editing toward review, orchestration, and context management. Here is what developers should watch.
Local Browser Tools vs Upload Tools 日本語ガイド
日本語の local browser tools vs upload tools ガイド: Learn when to use local browser-based developer tools instead of tools that upload your input to a remote server.
Local-First Developer Tools in the AI Era 日本語ガイド
日本語の local first developer tools in the ai era ガイド: AI workflows make context more valuable and more sensitive. Local-first developer tools still matter for privacy, speed, and focused debugging.
What Is MCP, and Why Should Developers Care? 日本語ガイド
日本語の what is mcp and why developers care ガイド: A developer-focused explanation of Model Context Protocol, why AI tools need shared context, and where MCP fits in modern coding workflows.
実務で使えるツール
記事では技術と開発ワークフローを扱います。データの確認、ペイロード整形、値の生成が必要なときは、ツールボックスをすぐ開けます。