I haven’t opened my PS5 since I subscribed to Claude Max a few weeks ago 🤔

I built a Claude Code plugin that teaches it how to work with Ruby - picks the right version manager, reads the right docs, connects to Ruby LSP. I think we will eventually have community maintained bridges between AI agents and the language ecosystem.

With Aliki shipped, in 2026 I'll be focusing on RDoc's writing experience: better Markdown support (some in v7.1.0 and more to come), RBS type signatures, and AI-friendly documentation. st0012.dev/2026/01/12/m...

Over the weekend I rebuilt my blog using Claude Code. Then I tried fixing issues from my phone using Claude's Code sessions. It was a fun experience and I want to write more posts this year! st0012.dev/2026/01/11/f...

RDoc has always supported Markdown as a markup language. But its support was buggy and lacks documentation. After a year of addressing various related issues, I was able to rewrite a doc for it. I think we'll soon be able to migrate from RDoc to Markdown. ruby.github.io/rdoc/doc/mar...

After 6 months of using AI to help me work on OSS projects—from contributing to new projects, to maintaining and drastically improving my own projects—I'm cautiously optimistic that AI tools can be positive for OSS maintenance: st0012.dev/ai-and-open-...

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.

ZJIT is available starting in Ruby 4.0! Please try it out on your test suite, maybe in a staging environment, and let us know how it goes! railsatscale.com/2025-12-24-l...

The official Ruby documentation site is also renewal at this year. ruby-lang.org/en/news/2025... Thanks @st0012.dev !

#rubyrelease30th I’d like to introduce Aliki, RDoc and docs.ruby-lang.org’s new theme 😄 railsatscale.com/2025-12-22-i...

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

Finally, www.ruby-lang.org/en/ has a new design.

I'm really happy to see @marcoroth.dev receive the 2025 Rails Luminary Award! 🎉 He’s done so much for the Rails ecosystem and the Ruby community. Huge congrats, Marco! 🙌 And it's great to have @fxn.bsky.social and @amandabrooke.bsky.social around. #rails #RubyOnRails #ReActionView #herb

Finally, I made Ruby 30th anniversary stamp for @therubypassport.com You can get this at Ruby conferences that I'm going to.

Ever forget whether it's "change_table" or "alter_table", "remove_column" or "drop_column", "set_column_null" or "change_column_null"? You don't? Well, I do 😄 So, I thought it would be cool if Ruby LSP could autocomplete schema statements in migrations ✨ github.com/Shopify/ruby...

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.

Subscribe to Ruby Around the World if you haven’t already! ☺️ youtube.com/@rubyaroundt...

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 🙂