Development of Ruby 4.1.0 started ``` ruby 4.1.0dev (2025-12-26T00:31:28Z master 290fa0d8b4) +YJIT +MN +PRISM [arm64-darwin25] ```

If I were to do a 1.5 hour workshop on JRuby, what would you most want to learn? Performance and optimization? Deploying Ruby apps on Java servers? Calling into other libraries on the JVM? JVM tools for profiling and monitoring? Hacking on JRuby itself?

Just published this year's version of my "Ruby Changes" project: a full annotated changelog for Ruby 4.0: rubyreferences.github.io/rubychanges/... Goals: Full, comprehensive, concise, well-structured. Examples, explanations of reasons, links to docs, all of it.

This edition is packed with goodies released/announced/launched for #Ruby community. Make sure you set aside some time these weeks to go through it -> newsletter.shortruby.com/p/edition-162

Ruby's new identity statement caught my attention: "A language where people gather, a site where people are visible." Source: www.ruby-lang.org/en/news/202...

RubyGems/Bundler 4.0.3 is out now. blog.rubygems.org/2025/12/23/4... This release to improve handle precompiled gem with new release version of Ruby like 4.0. github.com/ruby/rubygem...

🌸 Here’s your State of Hanami for 2025. We took our first steps into a new era: we made a substantial release, began unifying our ecosystem, launched our sponsorship program, and saw a real uptick in community activity. Read all about it! hanamirb.org/blog/2025/12...

Ok, first working version is out :]

Don't have much experience with testing React but this was a fun read from @avdi.codes: Source: avdi.codes/can-you-tel...

I published the context and concept for redesigning www.ruby-lang.org. www.ruby-lang.org/en/news/2025...

We were very proud to present @marcoroth.dev with the Rails Luminary Award 2025. And yes, I was on a secret mission to Zurich 😀. rubyonrails.org/2025/12/17/m...

One of my intentions with the Short Ruby Newsletter was to create an archive for these types of discussions. So, next time someone suggests that Rails might be the problem at GitHub, here are two people who can confirm it was not.

Alright friends, today’s the big day…we’re opening up tickets and CFP for Blue Ridge 2026! 🎉 We’re going to be at the YMI Cultural Center in downtown Asheville, NC on April 30 & May 1. We’d love to have you join us this spring in our favorite mountain town. ⛰️

I have released Zeitwerk 2.7.4. It improves the performance of some validation logic. This may be measurable in large apps with ignored directories and lots of autoload paths. In Gusto's main application (+20 autoloaders, ~2000 autoload paths), the patch saves 800 ms of boot time.

🚨 New episode alert 🚨 A couple days ago Rob and Tim joined me to talk about OOP. The conversation was illuminating, and it was great to get their insights! Find more here: open.spotify.com/episode/0Cno...

The next SF Ruby is this Thursday, hosted by our friends from Intercom, and we'll talk about Ruby 4.0 (of course!), one yummy JS runtime i(n a gem), and the ideas on building AI libraries for Rails. Join in! luma.com/sfruby

One thing I'm really excited about in Ruby 4.0 is that object allocation is going to get a nice speed boost

When working on #goodenoughtesting, I keep three LLM tabs open: Claude, Codex, and Gemini. I test each prompt against all three to catch where instructions break down. When they disagree, that's where I focus as I want to reliable generate tests. Adding Amp to the mix soon.

Ok, now it feels real. 😌

Next week I’ll be at the last Railshöck of the year, in Zurich. There will be talks by Alessandro Rodi, @marcoroth.dev, and yours truly. It's going to be a good one. Being Switzerland, I am leaving my credit card at home 🤣. www.meetup.com/rubyonrails-...

Yesterday I talked with @onurozer.me about the #goodenoughtesting workshop and where to take it next. One thing became clear: I need to better communicate what problem it solves and for which teams it works best. Not just build more content, but explain the value more clearly.

If you use AI to edit your blog posts, always keep the original version. Not to preserve your mistakes, but to learn what the AI changed and decide what to keep. It also has the side effect of having a collection of writings by you that were never changed by the AI.

Learn more about `closedby` on MDN: developer.mozilla.org/en-US/docs/...

Another tip on closing <dialog>s involves the new `closedby` attribute. Putting `closedby="any"` on a <dialog> adds light-dismiss functionality to the dialog, meaning users can close the dialog with the Esc keyboard shortcut. #StylishHTML

Rails 8 finally brings native composite primary keys! We explore the complete evolution from Rails 3's single-id assumption to Rails 8's multi-column identity support #Rails #Ruby #RubyOnRails #CompositePrimaryKeys #ActiveRecord #WebDevelopment #SaaS #DatabaseDesign blog.saeloun.com/2025/12/10/e...

This is a great feature, you can see it in action in the rubynewbie posts now, for example: www.rubynewbie.org/10-ways-to-p...

I released a beta version of a new library that provides open source icon sets as Tailwind v4 utility classes. You get predictions from Tailwind’s language server and Tailwind includes only the icons you actually use. Currently shipping with Bootstrap and Tabler icon sets. github.com/joeldrapper/...

This is not about fixtures vs factories, I use both depending on circumstances. This is about making better use of fixtures on large projects: radanskoric.com/articles/fro...

📅 Tonight @genevarb.bsky.social !!! www.meetup.com/geneva-rb/ev...

This week we published the 160th edition of Short Ruby Newsletter. This edition is sponsored by undercover-ci.com, the Ruby coverage toolkit ready for the vibe coding era

It was great catching up with Ernesto! I was particularly interested in talking to him about DX and a product idea I had last year for measuring qualitative aspects of working in a codebase.

Does anyone have experience with using AI to interface with an Obsidian vault? Summarizing, also traversing by following links etc

Have you noticed how great the Ruby docs looks like for the master? docs.ruby-lang.org/en/master/ Thank you @st0012.dev and the entire team contributing to RDoc for these improvements.

𝗕𝗮𝗹𝗸𝗮𝗻 𝗥𝘂𝗯𝘆 𝟮𝟬𝟮𝟲 proudly presents its first speaker: @Onurozer.me, a long-term marketer, now a self-taught Rubyist and entrepreneur. Onur runs SaaS businesses and will discuss why your tech stack doesn't matter and what you should focus on. Meet him in Sofia: balkanruby.com/talks/31

I found an interesting study while working on AGENTS md files: How many instructions can LLMs actually follow at once? - Jaroslawicz, D., Whiting, B., Shah, P., & Maamari, K. (2025) The answer might surprise you. Even the best reasoning models struggle more than you think.

I was reading this article: www.humanlayer.dev/blog/writin... and found the following information. Recently, I reviewed MRs where Claude Code completely ignored very simple and clear instructions in the Claude file. This might be the reason.

Useful trick when you want to share a #ruby snippet, get feedback, etc: You can write the tests in the same file as your code. The code works as expected, and running it by its file name executes the tests (`ruby greet.rb`, in this case). Got it from @skillstopractice.com's Ruby Best Practices :)

hey Brad... it's not strictly Ruby, but I have some Hotwire Club (free) perks: www.patreon.com/posts/its-th...

Week 48 - Invokers API, From ERB to JavaScript, and more! https://www.hotwireweekly.com/archive/week-48-invokers-api-from-erb-to-javascript/

Last Ruby deals push, this time for Cyber Monday! I picked up a few more deals and listed them at the bottom of Friday’s list. There’s some great deals on software & lots of discounted courses if you have some training budget left in the tank this year. beautifulruby.com/articles/rub...

You know what I really like about the current trend of using LLMs to build software? We suddenly write down code design decisions, document architectural choices, and in general write more specs. Why? Because LLMs need clear context to generate useful code. This is a big win!

Here's a great insight by @joel.drapper.me about Phlex: > It’s not that Phlex provides abstractions itself — it mostly doesn’t... But it provides a mechanism for *you* to write abstractions. skywriter.blue/pages/did:pl... #ruby #phlex

Here's my OSS report for this week: the UringMachine fiber scheduler is taking shape, another Ruby core PR, and some learnings about how Ruby does I/O. noteflakes.com/articles/202... #ruby

#ruby #rails #indiehacker

moneygun.fly.dev - added a playground for my Rails SaaS boilerplate! Try creating an organization & subscribing to the paid plan to access the paywalled page.

💰 Black Friday deal! @telebugs.com is only $199 until Dec 1. Use code BF2025

Rails tip: Use draw to break your routes into logical, modular files.

One step developers sometimes skip is defining test conditions before jumping into writing tests. Test conditions are statements that explain what needs to be tested.

30% off @pagecord.com! Rails-based. Source available 🤙 blog.pagecord.com/black-friday...

I collected all Ruby Black Friday deals I could find & posted them in one spot. Highlights include: $130 off @beautifulruby.com Phlex on Rails course $81 off @gorails.com annual subscription +20% @joemasilotti.com Hotwire native content Lots of @pragprog.com deals Enjoy! 🦃🔥💰