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Ruby is a high-level language with elegant syntax. But sometimes, performance-critical tasks can be slow in pure Ruby. Writing a C extension lets us move performance-critical code into native C for speed while also tapping into existing C libraries.

Sorbet, RubyLLM, FastMCP + Simple Tool DSL for Rails MCP Server - vrerv/rails_mcp_engine

RBS grammer for tree-sitter. Contribute to joker1007/tree-sitter-rbs development by creating an account on GitHub.

This post explores Rails’s swappable migration backend, a little-known feature that lets applications customize how migrations run. At Shopify, we relied on monkey patches and a brittle SQL parser to make Rails migrations work with our Schema Migrations Service. We developed the swappable backend feature to more simply adapt Rails’s migration runner to our needs. We’ll cover why and how we built this, and how Shopify uses it to power database migrations at scale.

ZJIT adds support for Iongraph, which offers a web-based, pass-by-pass viewer with a stable layout, better navigation, and quality-of-life features like labeled backedges and clickable operands.

Learn to tune the PostgreSQL logs for debugging and performance and switch to structured JSON for modern observability

Learn how UUIDv7 in PostgreSQL reduces conflicts in data management and why it increases efficiency.

How PostgreSQL scales in real-world systems, compared with MongoDB, and why true scalability depends on design and workloads, not headlines.

Explore how to build an AI coding agent that follows a full developer workflow, including creating Postgres branches, using a sandbox, fixing bugs, and raising pull requests with Xata, Vercel, and GitHub.

In this blog, we explore Postgres constraints through the pg_constraint catalog, covering table vs. column constraints, constraint triggers, domains and more.

What is a sequential scan vs index scan vs parallel scan .... and what is a bitmap heap scan? Postgres scan types explained and diagrammed.

A good software article you should probably read

Posted in r/RedditEng by u/Okgaroo • 516 points and 38 comments

Eslint plugin checking architecture boundaries between elements - javierbrea/eslint-plugin-boundaries

Playwright 1.56のエージェント機能に衝撃を受けた方も多いかと思います。しかし、この機能は実は突然現れたわけではありません。Playwrightのソースを4年間読み続けているエンジニアが、エージェント機能が公になるまでのPlaywright内部的な変遷を解説します。中の仕組みを理解すれば、他…

Google is announcing official MCP support for Google and Google Cloud services for AI agents.

Say goodbye to manual fallbacks! Explore how JavaScript default parameters make your functions more robust, readable, and bug-free.

Tips from an AI skeptic for working with a team which uses AI a lot.

Learn how Rails MCP Server’s new architecture reduces context consumption by 67% through progressive tool discovery, Rails introspection, and Prism static analysis.

Tests grow to thousands All make their claim on fixtures Frozen by demands

Iterate with AI. Without leaving GitHub. Contribute to pullfrog/action development by creating an account on GitHub.

The ultimate agentic GitHub bot. Powered by your favorite coding agents.

We have reimagined Gemini Deep Research to be more powerful than ever, now accessible to developers via the new Interactions API.

We got lucky with Shai-Hulud 2.0.

2025年12月からスマホソフトウェア競争促進法が施工され「チョイススクリーン」がスタートします。自分にぴったりのブラウザや検索エンジンを選びましょう。

この記事は はてなエンジニア Advent Calendar 2025 の 4 日目の記事です. id:susisu です. TypeScript の never 型がたいへん奥ゆかしいので見ていってください. 基礎編 まずは never 型がどういったものなのかを見てみましょう. 値のない型として 例えば numbe…

はじめに 「あれ、CPUクレジットがゼロになってる…？」 12月9日、AWSコンソールを開いた瞬間、血の気が引いた。t2.microインスタンスのCPUクレジットが完全に枯渇している。 うちのインスタンスは毎日夜中に再起動するのだが、再起動直後、クレジットが回復し始めた途端に一気に消費され、その後枯渇していた。 これは、私の個人開発サーバーが攻撃を受け、仮想通貨マイニングの踏み台にされていた記録です。  異変の発見 最初の違和感 個人開発で運用していたNext.jsアプリケーション。普段は静かに動いているはずのt2.microのCPUクレジットが何故か枯渇してい