Janko Marohnić
@janko.io
Senior Ruby engineer, father, dancer. Creator of Shrine, rodauth-rails and vim-test.
RuboCop 1.89 is out with improved rubydex integration that unlocks several project-wide analysis opportunities metaredux.com/posts/2026/0... Enjoy! #Ruby
RuboCop 1.89: Project-Wide Analysis with Rubydex
RuboCop 1.89 is out, and it comes with the usual assortment of new cops and bug fixes. But there’s one theme running through this release that I’m particularly excited about, and that’s what I want to...
metaredux.com
Large changes are hard to review. Smaller pull requests make them easier to ship. Stacked PRs are now on GitHub. https://docs.github.com/en/pull-requests/how-tos/stacked-pull-requests?utm_source=bluesky-motion-graphic&utm_medium=social&utm_campaign=stacked-prs-gtm-public-preview-2026
$ git history fixup <commit> is short for: $ git commit --fixup <commit> $ git rebase <commit>^ --autostash and it’s also instant AF
Tekin Süleyman ☕️@tekin.co.uk · 4w agoNice to see the `git history fixup` command added to Git 2.55. Handy for quickly amending previous commits in one go: github.blog/open-source/...
I wrote an update on the dispute with Ruby Central over Bundler and RubyGems. I'm sad it's reached this point, especially since Ruby Central's conferences are a big part of what convinced me to join the Ruby community back in the day. andre.arko.net/2026/07/30/rub…
Ruby Central's Destructive Legacy
At conferences and meetups, and in conversations online, many Ruby developers have asked me about Ruby Central and my disagreement with them. This post is my attempt to answer the questions I’ve been getting over and over, covering: 1) what is Ruby Central doing now? 2) has the dispute over Bundler…
andre.arko.net
Just in case you still use any Basecamp products, DHH is crashing out about his AI product gently pointing out that it’s bad for him to have extermination fantasies about the Roma people.
Introducing GemCP: MCP tools for RubyGems. Ask your AI agent about gem compatibility, dependencies, versions, and ownership with data straight from RubyGems.org. `gem install gemcp` and add it to your MCP config. github.com/baweaver/gemcp
github.com
There is a heated discussion at /r/ruby around this article: po-ru.com/2026/07/29/i... My hot take on the matter is the (half-imaginary) MINASWAN principle is an artifact of much simpler times. Thread, out of nowhere:
It doesn’t matter whether “Matz is nice”
I’ve met Matz once, I think, at EuRuKo in Krakow in 2010. We chatted briefly in Japanese. He seemed nice, but also quiet and reserved. At the time, he didn’t speak much English; perhaps he could speak...
po-ru.com
Blocking unfuzzed libvips loaders started being the default in ImageProcessing 2.0, but I didn't know how to push it over the finish line for Active Storage. Luckily for me, @flavorjon.es did his homework 👌
Mike Dalessio@flavorjon.es · last wk.Upgrade Rails immediately, kids, this is a big one. github.com/rails/rails/...
Upgrade Rails immediately, kids, this is a big one. github.com/rails/rails/...
Possible arbitrary file read and remote code execution in Active Storage variant processing
### Impact In its default configuration, a Rails application that displays image variants may allow an unauthenticated attacker to read arbitrary files from the server, including the process envi...
github.com
Genuinely, I find myself working harder. One of my super powers was I was faster than you at designing & writing what I needed to. I needed that time saved to be able to regulate, avoid burnout. Now that’s taken from me. I can’t outpace you. You (proverbial) got to catch up to me for free.
Rails' embarrassing racist daddy is now calling for the ethnic cleansing of Europe over on his blog, but it's fine because he's nice to people at conferences.
Come to EuRuKo together – with friends, colleagues, or your whole team. 🚀 You can save when you come together: 3 tickets – save €100 5 tickets – save €250 10 tickets – save €660. 📍 September 17–18. 2026.euruko.org #EuRuKo2026 #RubyCommunity #Brno
I just released Insta, a new snapshot testing library for Ruby, live at RubyConf in Las Vegas! Extracted from Herb's test suite and inspired by @mitsuhiko.at's fantastic insta library for Rust. `gem "insta"`
🚀 Zed v1.11 is out! Zed now has dedicated Staged Changes and Unstaged Changes multibuffers where you can review, stage, unstage, or restore individual hunks. Thanks drbh!
Broadcasting Turbo refresh adds an extra round trip and a debounce delay. Broadcasting the content directly fixes that, but introduces a race condition. Here's how to keep fast, immediate updates without race conditions: radan.dev/articles/tur...
When broadcasting a Turbo refresh is not enough: faster UX with versioned immediate updates
The simplest way to make a page collaborative with Hotwire and Rails is to subscribe to changes and broadcast a refresh when relevant models update.
radan.dev
Shrine 3.9.0 released, mostly polishing some rough edges and increasing compatibility between plugins. shrinerb.com/docs/release... And we've reached zero issues again after a long time 🤘🏻
Shrine 3.9.0 | Shrine
New features
shrinerb.com
Just upgraded Shrine demo apps & wiki from Uppy v2 to v5, Rails 6.x to 8.x, replaced Webpacker with importmaps, and upgraded Docusaurus v2 => v3. Something that would be a PITA to do manually was done in a breeze by Claude Code 🥂
RubyEvents Guides is now live. Over the last few months, I talked to Rubyists who want to help the community keep going. Some want to restart a local meetup. Some are organizing their first small conference. Some already run events and want to make the next one better.
People encouraging investing forget to mention that inflation is also a compounding negative force. "If you invest $100/mo for 10 years with 10% annual return, you will have put in $12k but would have ~$20k total". Adjusted for inflation in Czechia, that would be ~$10k invested and ~$13k total.
Hanami 3.0 is here and in full bloom 🌸 This is our most complete release yet: mailers, i18n, and Minitest now built in, your apps faster by default, and plenty more! hanakai.org/blog/2026/06...
Hanami 3.0: In full bloom
New mailers, i18n, and Minitest. Your apps faster by default. Our most complete Hanami yet!
hanakai.org
RDoc 8.0.0 is out now. This is the biggest RDoc release in years, and it brings together a lot of the Ruby documentation work I talked about at RubyKaigi. Also, RDoc now has a logo!
I asked Claude to generate release notes for Shrine... and I didn't want to change anything afterwards 😮 Like, it wrote them better and more comprehensive than I would have. It's great that this part can be automated now 🤘🏻 Much better than automated GH release notes that just list every commit.
Released Shrine 3.8.0 that does single-request uploads to S3 again for smaller files instead of always using multipart uploads. This should fix any performance/spending regression you might have experienced. Sorry for that! 😅
The difference between contributing to open source and just consuming it is not so much skill, it's how much time you're willing to invest to solve your problem "the right way".
It would be nice if Foo = Data.define(...) do BAR = "baz" end defined `Foo::BAR` constant, but it defines a top-level `::BAR` instead. I'm wondering if it's even possible lexically for Ruby to define nested constants inside a proc definition. One workaround I just found is `self::BAR = "baz"`.
I wrote a history of rv until now, what we've released, and what our plans are andre.arko.net/2026/06/13/rv-…
rv plan and progress update
This post was originally given as a talk at Rubycon IT 2026. The slides are also available. It’s been a while since I first talked about rv, a Ruby manager for the future. I’d like give an update on what we’ve done since then, but I’m going to recap some of that earlier post first to give context f…
andre.arko.net
I wanted to set custom class accessors on my AR models to a temporary value, but Object#with didn't work. Not anymore 😎 github.com/rails/rails/...
Make `ActiveRecord::Base.with` call `Object#with` when passed a block by janko · Pull Request #57693 · rails/rails
Motivation / Background I have custom class accessors on my Active Record models, which I wanted to temporarily set to a value for the duration of a block. I naturally reached for the Object#with m...
github.com
Well, I couldn't let it go, so I found a way 😃 github.com/Shopify/ruby...
Support "on type formatting" in Zed by janko · Pull Request #4133 · Shopify/ruby-lsp
Motivation Zed doesn't support snippet syntax ($0) in document/onTypeFormatting responses, nor is it possible for its Ruby extension to implement it. Because the cursor position isn't right...
github.com
Janko Marohnić@janko.io · 8mo agoIt's disappointing that auto-insertion of "end" after typing "def foo<enter>" isn't implementable via LSP "on type formatting". Ruby LSP makes it work with VSCode, but it relies on snippet syntax to bring the cursor back inside the method body, which isn't in the spec. So, it doesn't work in Zed.
I've been using the dhash-vips gem in ImageProcessing test suite to assert on image similarity. However, its C extension has been failing on Ruby 4.0. Claude was able to inline the bits I needed using vanilla ruby-vips, allowing me to kill a dependency. Small wins 🤘🏻 github.com/janko/image_...
Inline dhash-vips · janko/image_processing@a64dbd5
It has post-install errors on Ruby 4.0. Replace it with pure ruby-vips with no C extension.
github.com
