JRuby & Rails Compatibility Table - FastRuby.io

The Modular Monolith in Rails: Engines, Packwerk & Boundaries

A comprehensive guide to building modular monoliths in Rails 8, covering the three main approaches: Rails Engines, Packwerk, and plain namespaced modules. Explains how each mechanism enforces boundaries differently — structural vs. CI-enforced vs. convention-based — with a side-by-side comparison table. Covers Zeitwerk autoloading behavior in modular layouts, inter-module communication patterns (method calls, ActiveSupport::Notifications, async jobs), data ownership rules (one database with logical table ownership), and testing strategies per module. Includes an incremental migration path for existing messy apps and honest guidance on when NOT to modularize. Also notes that Rails 8's Solid Queue/Cache/Cable reduces the operational pressure to extract microservices.

Once a Maintainer: Mike Dalessio

Mike Dalessio, maintainer of nokogiri, loofah, and mechanize, discusses how AI has transformed open source maintenance — particularly around security. He describes a flood of AI-generated vulnerability reports (17 in two weeks vs. single digits per year previously), the shutdown of HackerOne's Internet Bug Bounty program due to AI-generated report volume, and how AI is both useful (repeatable security processes, fuzz-like pattern matching) and harmful (low contributor engagement, security theater). He also reflects on maintainer burnout through the lens of Christina Maslach's burnout research, noting that all six burnout dimensions apply to open source maintainers, and shares coping strategies like slowing down and not treating every security report as an emergency.

Alchemy 8.3 released

AlchemyCMS 8.3 has been released with a completely redesigned admin dashboard featuring configurable, lazy-loaded widgets. New wildcard URL support allows dynamic content routing via URL pattern matching. The release also replaces the custom select web component with Tom Select (removing a jQuery dependency), updates TinyMCE to 8.6.0, adds automatic element cache invalidation on related object changes, and includes several developer ergonomics improvements. Breaking changes include removal of the AlchemyHTMLElement base class and soft-removal of Ruby 3.2 from the test matrix. Upgrading requires bumping the gem version and running the built-in upgrader.

How Ruby Implements Closures: What Really Happens When You Call lambda

A deep dive into how Ruby's YARV virtual machine implements closures under the hood. When a lambda or proc captures a local variable, Ruby copies the current stack frame environment to the heap, creating an rb_env_t object. Crucially, Ruby then redirects the Environment Pointer (EP) to the heap copy, so all subsequent variable accesses — including mutations — go through the heap. This explains why multiple lambdas in the same scope share the same captured variables (they reuse the same rb_env_t), why variable modifications after lambda creation are visible inside the closure, and why local variables survive after their enclosing method returns. Internally, both lambda and Proc.new produce an rb_proc_t object distinguished only by an is_lambda boolean flag.

Your Rails App Just Got Acquired. Now What?

Khi một ứng dụng Rails được mua lại, giai đoạn chuyển giao kỹ thuật thường khó khăn hơn bản thân thương vụ. Ba tháng đầu tiên quan trọng để xây dựng niềm tin với chủ sở hữu mới, bao gồm kiểm kê toàn bộ dịch vụ bên ngoài, chi phí, tiến hành kiểm toán bảo mật chủ động (cập nhật gem lỗi thời, xem xét quyền truy cập sản xuất, kiểm tra thông tin đăng nhập trong kho lưu trữ), và ghi chép kiến thức nội bộ trước khi thành viên rời đi. Nên ưu tiên ổn định hệ thống thay vì vội vàng phát triển tính năng mới, đồng thời minh bạch về lỗ hổng, chi phí và lộ trình khắc phục để tăng uy tín.

Một lập trình viên Rails nên đọc bài này để hiểu cách bảo vệ và chuyển giao dự án hiệu quả trong giai đoạn quan trọng sau khi được mua lại, từ việc kiểm tra an toàn, quản lý chi phí đến xây dựng sự tin tưởng với đội ngũ mới.

Beam Up: CLI to deploy static sites

Beam Up is a new open-source Ruby CLI gem for deploying static sites to multiple providers with a single command. It supports AWS S3, Netlify, Hetzner, Seal Static, Statichost, and SFTP. After installing via gem install beam_up and running beam_up init to configure a provider, deployments are triggered with beam_up ./output. It can also be used as a Ruby library. Beam Up integrates natively with Perron, a Rails-based static site generator, enabling one-command build-and-deploy via bin/rails perron:deploy.

Issue #806: A Rails blog app in a ~500KB binary — Ruby Weekly

Ruby Weekly issue #806 covers a range of Ruby ecosystem news. The headline story is an experiment compiling a Rails blog app to a ~500KB binary using Spinel (Matz's AOT Ruby compiler) and the Roundhouse compiler, serving the app in just 12MB of RAM. Other highlights include a proposal to add parallel sweeping to Ruby's GC (showing ~3.64% runtime improvement), the json gem 2.20 release with non-recursive parsers and a new ResumableParser, a pure Ruby X11 terminal emulator, and several library releases including RubyGems/Bundler 4.0.15, mruby/c 4.0, Rails Event Store 3.0, and Grape 3.3.