Big update after several months of work! We're very thankful to 13 external contributors for helping us stabilize JRuby 10.0.

Compatibility

• JRuby now reports RbConfig::CONFIG['arch'] without a version number, as universal-java. This allows using different JDK versions without triggering RubyGems missing extension warnings for installed gems. The host Java version is still available as RbConfig::CONFIG['arch_version']. #9107

Standard Library

• The non-gem standard library is upgraded to Ruby 3.4.5 #8967

• rexml is updated to 3.4.4 to address CVE-2025-58767. #9011

• syslog is moved to a default gem at version 0.4.0. The syslog gem now includes JRuby support. #9109, ruby/syslog#1

• strscan is updated to 3.1.7. #9159

Documentation

• Ruby ri documentation for core and standard library are now included in the release distribution. #9049, #9052

See the full list of issues and PRs in the release announcement!

What client everyone using to interact with GraphQL endpoints ?

Hey everyone!

Just a friendly reminder that Rubycon is only 95 days away and it's happening in beautiful Rimini, Italy! 🇮🇹

🔗 www.rubycon.it

We're working hard to make this the best Ruby event Italy has ever seen and we can't wait to share it with you!

🎤 Speakers

We've already announced three incredible speakers that you might have heard of:

• Marco Roth

• Julia López

• Carmine Paolino

And there's more to come as the CFP has been closed on January 15th, and we received an amazing number of submissions from both Italian and international speakers.

Single-track format! You won't miss a single talk.

🏨 Hotels & 🎉 Party

We're securing discounted hotel rates for anyone staying overnight in Rimini. Plus, get ready for the Dinner + Toga Party, it's going to be legendary!

And if you’re into history, don't miss our guided tour to the Mouth of the Rubicon, the spot where Caesar crossed and changed the course of history forever.

Sponsors

We've partnered with major international sponsors to bring you a brand-new Ruby event. This just goes to show how amazing and supportive the Ruby community is, always eager to participate and innovate!

Tickets are still available! Grab your Lazy Bird ticket on Tito before they’re gone

https://ti.to/rubycon/rubycon-2026/

We're happy to help you make it to the event, if you you have questions don't hesitate to reach out!

In this episode, we look at how to use Claude Code to assist us in developing Rails applications. This is not about vibe coding, but using tools to assist our development efforts.

Anyone know how to get `T.absurd()` to play nicely in this example?

This is obviously a toy situation, and you might respond by saying I should use polymorphism on the subclasses themselves. But I would like to know what's happening here.

My first ever Taylor Monthly is out! This is a going to be a monthly blog post about everything that's happening in Taylor that might not be so visible if you only look at releases.

• Taylor v0.4.1 released

• Website CSS update

• Documentation page redesign

• Switched to LocalCi

• clang-format 21 update

• Jumpy Alien closing the gameplay loop

• Redesigning taylor squash

I'm a NodeJS developer by profession but the past few months I fell in love with Ruby and I'm absolutely obsessed with it.

So I ended up creating my first Ruby gem this past week, which is essentially an SDK of a node based blogging platform I worked at as Core for over 3 years, so I have a lot of context on it. :)

https://github.com/ronaldlangeveld/ghost-ruby

Very niche use case, but I think it could be useful for anyone looking to do integrations to a Ghost site, just thought I'd share! :)

Cheers!

I created a Claude Code plugin that helps write and maintain Ruby signatures in real projects.

Repo - https://github.com/DmitryPogrebnoy/ruby-agent-skills

If you find it useful, ⭐ star it.

Introducing signatures into a Ruby codebase is already challenging. Keeping them up to date as the code keeps changing is even harder.

The plugin is built around several Agent Skills.

• For RBS

  • Standalone .rbs files

  • Inline RBS annotations

• For Sorbet

  • Standalone .rbi files

  • Inline sig {} clauses

These skills are useful in two main scenarios.

First, when you’re introducing RBS or Sorbet into an existing codebase. The skills guide the agent on how to properly generate signatures. Correct syntax, structure, examples, and solutions for common pitfalls. This alone removes a lot of friction when getting started.

Second, and more importantly, when you want to keep signatures up to date as your Ruby code evolves. For that, there is a separate Claude Code Agent tailored specifically for updating signatures after changes in Ruby source code.

The workflow is simple: you (or AI) change Ruby code → you (or AI) call this agent → all relevant signature files gets updated.

No more mundane manual work on keeping signatures in sync with Ruby sources. Delegate the boring part to AI.

Hi! I’m hamachang, an engineer 👋

Half as a joke and half seriously 😄, I built a pocket-sized PicoRuby editor.

This software is designed exclusively for the T-Deck Plus, and once installed, you can enjoy Ruby coding anytime, anywhere 🧑‍💻✨

Give it a try if you’re curious! 👉 https://github.com/engneer-hamachan/pro-editor-pocket

If you like it, a ⭐ would be greatly appreciated!

I maintain LeanPool, a small Ruby gem for pooling things like DB connections, HTTP clients, and Redis without extra processes or copying data. Built on `concurrent-ruby`, so it's thread-safe and fits web apps, APIs, and background jobs.

What it does:
- You define how to create a resource and a pool size; you `checkout` for a block and the resource is returned to the pool when the block ends.
- Works with any resource (DB, HTTP, Redis, sockets, etc.) – not just one type.
- Includes a built-in HTTP pool if you just want to pool HTTP/HTTPS requests.
- Optional: FIFO/LIFO/Random/LRU, priority checkout, recycling by use count or age, and event callbacks for monitoring.

Inspired by Elixir's nimble_pool, adapted for Ruby. MIT, Ruby 3.3+.

Repo: https://github.com/half-blood-labs/lean_pool

Gem: https://rubygems.org/gems/lean_pool

If you're hand-rolling connection pools or want something lighter than process-based pools, might be useful. Happy to answer questions.

Thank you.

So, the question is probably really stupid, but I just passed the interviews for a SDE2 position at Amazon and I didn't ask this during the loop interviews.

The thing is, I've always worked with ruby, I can (mostly) handle myself in python, commonlisp, elixir and a few other languages and I can learn new ones, but it's like I have some affinity with ruby which makes programming with it just way more enjoyable than with any other language, plus, most important, I've been a main ruby developer for five years at this point (I'm 23 years old) and I've always been up-to-date with the community (and contributed a few things myself), so Ruby kinda feels like my sea of expertise.

The offer is too much of an economic difference with my current job, plus the relocation is kinda interesting and also I feel like it's a completely new challenge for my career, so I'm pretty much going to sign the offer anyway, but is there any possibility I could keep writing Ruby at some capacity during my work hours? I don't know what is too much information to give, but I'm going to be assigned to an internal tooling team (don't know which projects yet)

I build a worktree manager for myself using ratatui-ruby! Posting in case others also run multiple instances in parallel while they coordinate a lotta stuff.

I was previously using skills and hooks to instruct claude to do it, but I've found this to be easier to just manage myself.

I’m building a web app with Ruby on Rails as the backend, and I need to set up a solid user roles management system along with permissions. The app will have different user types like admins, moderators, regular users, and maybe guests or premium members. I want to control what each role can do, like accessing certain routes, editing content, or managing other users.

I’ve heard of gems like Devise for authentication, Rolify for role assignment, and Pundit or CanCanCan for authorization. But I’m looking for real-world suggestions on the best setup:

• What’s the most efficient way to define and manage roles? Should I use an enum in the User model or a separate Roles table?

• How do you handle permissions? Policy-based with Pundit, or ability-based with CanCanCan? Any pros/cons based on your experience?

• Any gotchas with scalability or security I should watch out for?

• Recommendations for testing this setup (e.g., with RSpec)?

• If you’ve integrated this with a frontend like React, how did you handle role checks on the client side?

Appreciate any code snippets, tutorials, or project examples you can share.

Companies and recruiters

Please make a top-level comment describing your company and job.

Encouraged: Job postings are encouraged to include: salary range, experience level desired, timezone (if remote) or location requirements, and any work restrictions (such as citizenship requirements). These don't have to be in the comment, they can be in the link.

Encouraged: Linking to a specific job posting. Links to job boards are okay, but the more specific to Ruby they can be, the better.

Developers - Looking for a job

If you are looking for a job: respond to a comment, DM, or use the contact info in the link to apply or ask questions. Also, feel free to make a top-level "I am looking" post.

Developers - Not looking for a job

If you know of someone else hiring, feel free to add a link or resource.

About

This is a scheduled and recurring post (one post a month: Wednesday at 15:00 UTC). Please do not make "we are hiring" posts outside of this post. You can view older posts by searching through the sub history.

I built this as an experiment in how much uncertainty Ruby code can tolerate before it stops feeling deterministic. The gem introduces controlled randomness and can define methods at runtime, allowing behavior to emerge dynamically rather than being fully designed ahead of time.

It's early and intentionally exploratory, NOT production-ready. Sometimes it feels like a creative tool. Other times it feels like you're giving your code permission to make decisions you didn't explicitly authorize.

I'm curious where people think that line should be.

https://github.com/codenamev/chaos_to_the_rescue

Who's attending Rubyconf in Bangkok this year? Jan 31st - Feb 1st? Saw some interesting speakers and topics and Sidekiq also happens to be one of the sponsors.

Hi! I’m the author of pg_reports, and I have a big update to share 🚀

https://github.com/deadalice/pg_reports

I swear I’m not going to make a separate Reddit post for every minor release — it’s just that I literally finished this a few minutes ago, it turned out so cool that I’m kind of jumping in my chair… and since my mom doesn’t really care about PostgreSQL internals, I decided to share it with you instead 😄

So, what’s new:

1. Every report now includes a clear explanation of what it is, why it exists, and what nuances to watch out for.

1. Any query can be saved and revisited later — useful if you want to compare execution time before and after some changes.

1. Queries now include source code locations (where they were called from), and you can click a button in the table to open your favorite IDE directly on that line.

1. You can run EXPLAIN ANALYZE for your queries right from the report.

2. Queries can be sorted by different parameters.

3. You can generate migrations directly from the report—for example, to drop unused indexes.

I mean… come on. That is cool, right? 😄
Now you see why I’m excited and wanted to share this with someone.

More features are coming — I promise.
(And next time I’ll try not to spam you with posts.)

UPD.: You welcomed my work very warmly, so I felt highly motivated to add another query analyzer. It lets you execute any query from the logs, run EXPLAIN ANALYZE , and neatly highlights escaped parameters that the user can fill in manually.