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Gitのworktreeサブコマンドは、AIエージェント開発が普及してから急によく知られるようになった感があります。実際にこれが登場したのはもう10年前、2016年のことだそうですね。私自身は業務の性質上、複数の依頼案件を並列で進めることが多くてAIエージェントが出てくる前からworktreeみたいなことをしていました…

目次 はじめに サマリ 人間はタスクを完全には並列処理できない 以前にも承認待ちの課題は存在していた 作った仕組みと設計上の工夫 issueの選定条件を明確にする 1回の実行で1 issueだけ扱う 複数のリポジトリを横断してコンテキストを集める まとめ 参考文献

Introducing interactive refactoring in gopls and the LSP: a new capability that brings dynamic, multi-step refactorings into your favorite editor.

Go 1.27 includes a change to the HTTP client that can make programs sending many sequential HTTP/1 requests significantly faster.

“Write tests… first ? That sounds backwards.” I know exactly what you mean, but stay with me. This is going somewhere… backwards, and in high heels!

A real browser inside your terminal. Contribute to zenbu-labs/terminal-browser development by creating an account on GitHub.

Build graphical applications in the terminal

Contribute to QuadDepo/env.style development by creating an account on GitHub.

Style your favicon with colors or custom icons, so every tab shows where you are.

We built Remote Dev so AI agents can build and test apps in parallel, without maxing out developers’ laptops.

Browse tool versions and download stats for mise

Stretchtext replies for Claude Code: short by default, each phrase grows in place when you click it - pro-vi/cc-stretch

Replace repeated ENV cleanup with stub_env, then teach your AI assistant to use it. A real refactoring with measured line and token counts, and its limitations.

I’m starting a personal project: Mailractor, a mail server written in Ruby. Before writing a single line of SMTP, I wanted to answer the question that shapes the whole architecture: which of modern Ruby’s concurrency models can handle this kind of load?

It took me a while, I know, but two new versions of CanCanCan are here: 3.7.0 is out already, and 4.0 is coming. Here is what changes and why I have two of them.

コーディングエージェントの普及で E2E テストの比重が上がるなか、テスト基盤の側でフィードバックループを小さくする4つのプラクティス（デプロイレスのテスト実行・テストの並列化・自己完結型のテストレポート・分散トレーシング）を紹介します。

Five rewrites of a Node.js link preview endpoint: URL normalization, an LRU cache, caching the promise to stop a cache stampede, fetch timeouts, and reading only up to /head.

Whenever I build a new tool or custom element (like show-keystrokes or rich-input), I always end up doing the same manual dance: checking if the package name is still free on NPM and if the matching name.netlify.app subdomain is still unclaimed on Netlify. To automate that check, I built caniname.

Promise queue with concurrency control. Contribute to sindresorhus/p-queue development by creating an account on GitHub.

Create random strings that match a given regular expression. - fent/randexp.js

Oracle Database driver for Node.js maintained by Oracle Corporation. Connect your JavaScript and TypeScript applications instantly to Oracle Database. - oracle/node-oracledb

Contribute to socketry/async-grpc development by creating an account on GitHub.

Much has been said about the DHH keynote that he gave at RailsWorld. To me, it was the voice of a person in an existential crisis, but also a very jaded one. “Look how I don’t care anymore, and you should not care either” is not a great message when you are the headline speaker at the conference - let’s call it CareConf - that you have, yourself, lobbied for. The message from the supreme leader was clear: we vibe-rewrote HEY in a more performant way, it worked great, we neither need nor care about Rails anymore. I honestly believe that, instead of amassing even more applause via vitriolic truth-bombing, he could have just left the toy he no longer loves - including its community - in peace. But here is the thing: the rich and famous losing interest in the good stuff does not oblige the rest of us to. If anything, it frees up the room.

RuboCop 1.92 is out! Last time I talked about the long road to 2.0. This time the theme is more down to earth, and probably closer to how a lot of you use RuboCop today - AI coding agents. These days plenty of RuboCop runs aren’t started by a person at all. Claude Code, Codex, Cursor and friends run it after every batch of edits, read whatever it prints and try to fix what it found. That’s a very different user from the one RuboCop was built for. An agent has endless patience, but everything RuboCop prints ends up in its context window, and it can’t glance at a terminal and tell what’s obviously noise. So I spent most of this cycle making RuboCop a better citizen in that world.

Weather, tides, the sun, the moon, maps, and a planetarium, in your terminal. The Old Farmer's Almanac meets Minitel. - ashuttl/linecast

Hot Cell v1.0 moves Active Storage’s image, video, and PDF processing out of your Rails app and into a locked-down sidecar container.

Answers one question about a Rails app: what stands between it and Rails X? Scans the lockfile, Ruby version, Dockerfile, schema, config and code, then writes a single HTML report of blockers, fixe...

rails-preflight reads a Rails app and lists what stands between it and the next Rails version. Before releasing it, I checked it against Rails upgrades that already happened in Mastodon, Discourse and Forem.

I tested 25 of the most popular package managers to check whether they detect a compromised package repository injecting malicious code into legitimate packages. Only two verified the integrity of every package they downloaded.