I Tested Rails Baseline by Leaving Architecture Out of the Prompt
Note: Rails Baseline is the production-ready Rails foundation I tested here. It gives a new SaaS application and the coding agents working in it cle…
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Ruby Pathname Moved to Core, Documentation Upgraded
In release 4.0, the Ruby Powers-That-Be have brought class Pathname into the Ruby core. This is a Very Good Thing. Through its many instance methods…
Tooling every AI software harness should have
When an agent writes the code, you stop reading every line. You can pretend otherwise for a while, but on any real codebase you end up skimming a 60…
I Could Hack My Own Rails App With One Hidden Input
I've been building RepBoard , a Rails app that gives freelancers a portable reputation profile — collect reviews from clients, share one professiona…
Fixing "g++ Not Found" When Debugging Rails in RubyMine on Fedora
Fixing "g++ Not Found" When Debugging Rails in RubyMine on Fedora TL;DR: If clicking "Debug" in RubyMine on Fedora fails to install debase because o…
When a build breaks, the bug fixes itself
When a build breaks, the bug fixes itself We stopped babysitting CI failures. Now a red build files its own bug — and an AI agent picks it up and sh…
Built a Blog App with Rails & PostgreSQL – Looking for Code Review!
Hey DEV community! 👋 I've been working on a Blog Application built with Ruby on Rails to practice backend architecture, clean code standards, and Ra…
When a String Assumption Broke Newsletter Tag Filtering in Ruby
A bug doesn't always need hundreds of lines of code to cause a real production problem. Sometimes, one assumption is enough. In this case, the assum…
Work-in-progress updates on my new book, Testing Rails from Scratch
Hello! It has been a couple of months since I announced my latest project, Testing Rails from Scratch: A practical, (mostly) out-of-the-box approach…
Tired of JS for simple UI in Ruby?
Meet web_ruby_ui — write reactive client-side SPAs using 100% pure Ruby via WebAssembly. Features state management & VDOM diffing. Give it a try…
massive-import - a batch processing library
Hi, Requesting review for a lib I wrote. https://github.com/laughing-orca/massive-import Not production ready. Wanted to discuss the algorithm and s…
Learning Go as a Ruby Developer — Part 4: What can we do with a single "for"
So loops in ruby has several ways to implement 10 . times do | i | puts i end while condition # ... end users . each do | user | # ... end until fin…
Why I Stopped Waiting on Ruby LSP and Built My Own Fuzzy Symbol Search for VS Code
If you've worked in a mid-to-large Rails codebase in VS Code, you've probably run into this: you want to jump to a method, you hit Ctrl/Cmd+T, you t…
They scoped the customer and forgot the customer's ledger — a High-severity cross-tenant BOLA in Open Food Network
TL;DR What: POST /api/v1/customer_account_transaction in Open Food Network authorized against the class , not the record. It took customer_id straig…
One Rails request, one event: production context for coding agents
Wide Events is a Rails gem that puts the production context a coding agent needs onto one OpenTelemetry root span per request or job. In one product…
How to Remember Namespaces
I often see people using the term "namespace" incorrectly. Even when explanations of what a namespace is are presented, they only go as far as descr…
Kubernetes earned its security badge in 2017 and never came back
Kubernetes has an OpenSSF Best Practices badge . It earned that badge on 16 August 2017 at 14:52:28 UTC, and nobody has touched the entry since. The…
[Ruby] The True Value of Flow Control Operators
Introduction Ruby has four types of logical operators: && / || / and / or , each with a different precedence. && / || have higher pr…
3 Action Mailer Features I Didn't Know Existed
A few weeks ago I needed to check something in the Action Mailer docs, just a quick lookup. I ended up spending much more time there than expected a…
Learning Go as a Ruby Developer #3: Functions, Methods, and Why Go Doesn't Have Classes
One of the biggest mindset shifts I've had while learning Go came when I reached functions and methods. As a Ruby developer, almost everything revol…
Ruby Reactor vs dry-transaction vs Trailblazer: Choosing a Ruby Workflow Library in 2026
Four ways to orchestrate business logic in Ruby. One map to find yours. You're building something that involves multiple steps. Charge a card, send…
Bundler Quiz!
(Translated from the Japanese article .) This is a quiz about Ruby's Bundler! Add 8 characters to the following Gemfile so that bundle install fails…