TruffleRuby 33: The High Performance, GraalVM-Based Ruby Implementation — Healthy languages have multiple implementations, and TruffleRuby, originally created by the late Chris Seaton, is celebrating its 13th birthday with both a major release and new web site. v33 boasts it's ‘the fastest and easiest Ruby to install' – a claim I just successfully tested.

The TruffleRuby Team

Start Fixing Bugs Faster with AppSignal — AppSignal gives Ruby developers the tools they need to fix bugs, track performance issues, and ship with confidence. Easy to set up, a joy to use, and built for teams that care about their code. Start your free trial today, no credit card required.

AppSignal sponsor

Ruby 4.0.1 Released — A minor update to Ruby 4.0, including a fix to a regression in Kernel#sleep, as well as a few smaller bugfixes. Future releases (4.0.2, 4.0.3, etc.) are expected every two months from here on.

Takashi Kokubun

Portable mruby Binaries with Cosmopolitan — Let’s say you want to use mruby as a way to create standalone executables and have them run across numerous systems: mruby 3.5’s new Cosmopolitan Libc support comes to the rescue!

Paweł Świątkowski

🌐 Ruby Can Draw Cities Now — An initial look at using libgd-gis, a libgd-powered way to render maps and GeoJSON layers from Ruby.

Giménez Silva Germán Alberto

Build a Feature Flag System in 50 Lines with Rails.app.creds — Feature flags that are version-controlled, easy to override in development, and don’t require another service to manage.

Code with Rails

🤖 Plan Your Rails Upgrade with FastRuby’s AI-Powered Tool in Minutes — In a few clicks, know what it takes to upgrade your Rails app. Low on time? Ship your upgrade with FastRuby’s Bonsai team.

FastRuby.io | AI-Powered Roadmap sponsor

Protocol::URL A New Way to Parse, Manipulate and Construct URLs — A modern clean, standards-compliant API for working with URLs according to RFC 3986. Tidy and well documented.

Samuel Williams

🖼️  FastResize: A High Performance Image Resizing Library — With the boast of being ‘the fastest image resizing library on the planet’, I had to give this a try. It supports resizing JPEG, PNG, WebP and BMP in a variety of ways and worked well in my own testing.

Tran Huu Canh

Your 90% Test Coverage Is Hiding Untested Methods — Shipping AI code? Undercover warns you which methods lack tests, right in your Ruby PRs. Free for open source.

Undercover CI sponsor

🤖 RubyLLM 1.10.0: The Cross-Provider LLM API for Ruby — A significant release for the popular cross-provider LLM API that brings first-class extended thinking across providers, Ruby 4.0 support, full Gemini 3 thinking-signature support, and more.

Carmine Paolino et al.

httplog 1.8.0: Log Outgoing HTTP Requests in Ruby — Handy for debugging API integrations or just to get a feel for what’s going on under the hood. Hooks into HTTP, HTTParty, Net::HTTP, OpenURI and others.

Thilo Rusche