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I'm running 44 AI agents across multiple projects. Each one is just a model pointed at a folder.

An overview of what's new in language features, frameworks, runtimes, build tools, testing, and more.

Every month I walk to the end of my driveway and stuff my mailbox with a tall stack of letters. Actually, I have to repeat this process a few times, because sta...

Let’s imagine we have a database table of Pokémon, like so1:

Most AI SEO advice is unproven. We tested what ChatGPT, Claude, and Perplexity actually read on our own site. Six LLM visibility techniques that worked, eight that didn't, and the metrics to tell the difference.

Rails 8.1 adds Rails.app.creds to unify ENV variables and encrypted credentials behind a single API.

In this article, we will look at how the LinkedIn engineering team rebuilt the Feed and the challenges they faced.

rbenv vs rvm vs asdf vs mise vs chruby vs direnv

An Open Source Claude Code skill based on our 60,000+ hours of Rails upgrade experience. Learn how our opinionated methodology teaches Claude Code to upgrade Rails, fast.

RSpec model specs: 6 minutes for 3,780 examples. Minitest model tests: 66 seconds for 9,835 tests. Both parallel. I built a 6-gate multi-agent pipeline in Claude Code to make the migration work.

A production guide to building multi-tenant SaaS with Rails 8 — subdomain routing, custom domains, and automatic SSL with Caddy's on-demand TLS.

One of the most frequent code smells in Rails is an excessive use of inheritance. A serious drawback from using inheritance to achieve polymorphism is the implicit coupling it creates between parent and child classes.

I built a system that builds the system. 4 hours from idea to production. Here's my full AI coding workflow for Rails.

Large Rails monoliths burn millions of tokens per AI session. These 5 architectural changes cut costs and boost AI suggestion quality by 3-4x.

From the “Entrepreneurship without the fantasy” desk

Can Ruby Read an X-Ray? Building a Medical Image Processor March 23, 2026 Published on RubyStackNews Nobody expects Ruby to process medical images. That is exactly why I tried it. This article is a…

Custom form helpers and builders can help reduce fragmentation if every developer in the team solves the same problem differently.

Learn how to add events to your calendar with a bridge component

I built a full analytics dashboard for my Rails blog — unique visitors, bounce rate, SVG charts, geolocation — with no third-party scripts. Here's exactly how I did it with Claude Code and Ahoy.

A step-by-step guide to deploying a Rails 8 application with Kamal 2, the Solid stack (SQLite, Solid Queue, Solid Cache, Solid Cable), Ansible, and Hetzner — from bare server to production.

Haptic feedback for the mobile web.

Use inflect.acronym to keep API, SMS, and other acronyms correctly cased in class names and autoloading.

My legacy Rails app playbook. After 50+ engagements, here's the exact process, tools, and stakeholder questions I use in week one.

I love a good side-project. Like most geeks, I have a tendency to go down rabbit holes when faced with problems - give me a minor inconvenience and I’ll happily spend weeks building something far more elaborate than the situation warrants. There’s joy in having a playground to explore ideas and “what ifs”; Building things just for the sheer hell of it, as Richard Feynman put it “The Pleasure of Finding Things Out”.

Skills for developers from the product manager playbook