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I've uploaded the slides for my RubyPrize talk @RubyWorldConf: Ruby DX - Past & Future. It's short (15min) but I summarized Ruby DX progress since Ruby 3.0, shared my thoughts on how to prepare for the AI age, and a teaser for an upcoming project 😉 github.com/st0012/slide...

Extended an existing doc to explain Ruby’s VM stack, which I learned from my ZJIT work: docs.ruby-lang.org/en/master/co...

My advice on top of this: Use AI to learn the codebase and explore contribution options and ideas, then write the PR manually. I also wonder if projects having some agent instructions can: - Make AI-assisted exploration more productive - Reduce fully automated vibe-coding PRs

I'm very honored to have received this year's RubyPrize from Matz's hands in Matsue last Thursday, recognizing my work on Ruby and its development tools. I can still remember how nervous I was asking Matz for a picture back in 2016 😂 Time really flies (Photo from @hsbt.org ❤️)

This

Pistol Squat ✅

This just made my day! 🙏🏼 Open Source can be rough sometimes, but it's really awesome when people take the time to report how it works for them! Can't wait to see where Herb is going in the next few months! 🌿

Announcing ractor-shim, a new gem that reimplements Ractor on top of Thread & Queue: github.com/eregon/racto... This gem provides the full Ruby 3.5 Ractor API (Ractor::Port, Ractor#{join,value,monitor}, etc) on TruffleRuby, JRuby, and CRuby 2.7 to 3.4.

If you want to make change or add new feature to Ruby, I suggest to read www.a-k-r.org/pub/howto-pe... Ruby's decision-making process isn't democratic or based on voting. It's more like a game of persuading Matz and Module maintainers.

I was recently reminded that not everyone fully understand what the frozen string literal magic comment is about. So I figured it was the occasion for another deep dive. byroot.github.io/ruby/perform...

I'm excited to share that I became a Ruby committer today! A 10 year goal since RubyKaigi 2015. Huge thanks to @bernsteinbear.com for the JIT mentorship and nomination, @k0kubun.com for years of guidance, and everyone who supported me along the way. Looking forward to improving Ruby and its DX!

I made it easier to search Ruby's docs www.johnhawthorn.com/2025/searchi...

When people complain Shopify is too prominent, only main company donor in RC, etc. WTF folks. As if that was their choice! Where are the other companies pushing Ruby and Rails with real money and resources to be on par? Talk is cheap.

I wrote about some of my thoughts on the lessons we can learn from the RubyGems situation and how we can move forward. blog.peterzhu.ca/open-source-...

Turns out Herb linter doesn't have this limitation. So why wait: github.com/ruby/rdoc/pu...

@marcoroth.dev Is it possible for HERB to support `.rhtml` extensions too? Legacy non-Rails projects, like RDoc, and RDoc template gems like SDoc, can use .rhtml as template extension instead of .html.erb. Or is there a way we can configure the target extension name?

🎉 Incredibly honored to be a Ruby Prize 2025 finalist! Thank you to everyone who has supported my work on IRB, RDoc, debug, ZJIT, and other Ruby projects. See you in Matsue! rubyprize.jp

I was excited to use MCP servers with Claude Code to iterate on frontend changes. But I quickly realized that using entire page screenshots consumes context extremely fast. So I ended up taking smaller screenshots manually to avoid frequent compaction. Any tips to avoid this?

Thank you for writing this, especially: > Aaron got nerd sniped into making Bundler faster, and now he’s being called out for supposedly being part of a hostile takeover? Give me a break.

This is by far the most sensible take ever since all this mess started. Glad there are still some people capable making the difference between unsubstantiated conspiracy theories and proper reporting of facts. Thank you ❤️

In most cases, becoming an OSS maintainer/committer/core team member, whatever you call it, isn’t some special privilege won by luck. Yes, it looks good on a profile or resume—but that’s often the only “benefit”

I’m excited to share that I’m starting as a Staff Developer at Figma!

It always irks me when I order at a pub and the staff try to confirm if I want to full pint 🙄

Shopify sponsors and collaborates with academia to take Ruby to new heights. We're working with Australian National University to integrate Memory Management Toolkit into Ruby. Earlier this year, we published a paper about it. Today, we wrote a blog post: railsatscale.com/2025-09-16-r...

Invest some time to set up the debugger for your project, and document how to use it. You don’t have to debug everything with it, but having it available will save you a lot of time when you do need it. mahesh-hegde.github.io/posts/what_d...

This summer I started working on Ruby's new JIT compiler—ZJIT, with zero JIT background After two months of learning, I wrote about the questions that puzzled me most: - Where does JIT code live? - How does Ruby execute it? - And more! railsatscale.com/2025-09-08-h...

📣 After a lot of work we've shipped Ruby & Rails SDKs with support for @sentry.io brand new Logs feature which is now out of beta! While you're waiting for Rails' "structured events" feature, you can start using Sentry *today* to get structured logging work OOTB! 🎉 #Ruby #Rails #OpenSource 👇🏻

@marcoroth.dev I don’t write Rails frontend anymore, but the tools you built look so incredible I’m tempted to find a project to try them out!

It's still hard to believe that this just works now. Especially seeing it on apps that I haven't even seen before, beautiful! 😍

Finally got a full #frontlever after entire year of training 😵 Skill difficulties from my experience: frontlever >> one arm pullup >>>>> muscle up

I took a journey into the heart of Ruby to learn the secrets of the /o regex modifier, and I emerged wiser, but also so deeply tired. jpcamara.com/2025/08/02/t...

Here's the post I mentioned—how AI coding agents enabled my leap from a decade of Ruby-only development to contributing to Sorbet, RBS parser, and ZJIT railsatscale.com/2025-07-19-ai-coding-agents-are-removing-programming-language-barriers/

Been thinking about how AI coding agents are changing my career. To me, the appearance of coding agents and the advancement in models in the last year have changed how I learn and work. Will share my experience in a blog post soon 🙂

ruby-lsp now has CLAUDE.md: github.com/Shopify/ruby... (generated by Claude and vetted by our team) Not sure how much it'll help the team and external contributors but I'm excited to find out 😁

If you're interested in learning more about Ruby internals, there's a list of glossaries that can help you: docs.ruby-lang.org/en/master/co... (I just fixed the page's table rendering 😛)

Never imagined I could do a 200% bodyweight pull-up (my weight + 60 kg plates) even in my early twenties—yet at 31, I got it today 😛

Proud to land my first ZJIT contribution this week—in Rust! github.com/ruby/ruby/pu...

Read The Nice Manual! In the happy world of #Ruby, we don’t #RTFM, we #RTNM New documentation website for Ruby, Rails, and a bunch of selected gems: rubyrubyrubyruby.dev Short intro post: www.rorvswild.com/blog/2025/re... Contribute: github.com/BaseSecrete/... Wdyt?

BTW, I’ve opened a draft PR for this: github.com/Shopify/ruby... We’re now waiting on a new VS Code API to let extensions configure the MCP connection, which will make the setup simpler & more robust.

Starting my substack today codeanth.substack.com/p/hello-world

A brand-new, pure-C RBS parser has been merged 🚀 It has no Ruby runtime dependency, so it can be embedded in Sorbet, JRuby & other tools. It’s the result of months of work by Shopify’s Ruby DX team: Alexander Momchilov, Alexandre Terrasa & me 😁 Details in github.com/ruby/rbs/pul...

I’ve been visiting Taiwan for the past few weeks, and almost everyone—family and friends—has expressed concerns about a potential invasion in the next year or two, either explicitly or indirectly. Sometimes we even jokingly say, “Hope to still see you here next year.”

My teammate Alexandre Terrasa wrote a great post about using inline RBS with Sorbet. We’ve been slowly adopting it at Shopify. And while we’re still improving Sorbet and all the supporting projects, it’s already working well! railsatscale.com/2025-04-23-r...

It’s been 6 years since my last visit, and @asakusarb still gave me the warmest welcome! Same good vibes, delicious food, and wonderful #rubyfriends. Grateful to be back in such a lovely community 🥰

If you’re curious about how Ruby’s official documentation is generated and deployed, I documented the entire process a while ago at github.com/ruby/docs.ru...

Hanging out in Tokyo for another few days

In the AI age, documentation becomes even more important as it communicates intention to the models. To help devs write better docs, tools like RDoc need to improve and integrate more deeply with editors and other tooling. All this is to say, there's a lot of work ahead 😌

Come to my #rubykaigi talk today at 3:40 to look at the modular garbage collectors feature in Ruby 3.4. We’ll discuss what it is, how it’s implemented, and how we’re implementing MMTk using modular GC. Hope to see you there! rubykaigi.org/2025/present...

Got my first human-flag at #rubykaigi 😂