Bookmarks (183)

▶  The RubyKaigi 2025 YouTube Playlist — Ruby's 'home' conference, RubyKaigi, is an important entry in the Ruby event calendar. 2025's event took place last month featuring a keynote from Matz and talks from Tenderlove, Koichi Sasada, and many others. There are 57 talks (in English and Japanese) so you’re sure to find something interesting, but I'll link a few highlights below.

CodeRabbit Brings AI Code Reviews to VS Code, Cursor & Windsurf — Get line-by-line reviews, one-click fixes & codebase-aware feedback - all free in your IDE. Seamlessly integrates with git workflows. Install the extension & start reviewing!

Safely 0.5: Rescue and Report Exceptions in Non-Critical Code — The idea here is that while you may want to know about failures and exceptions, they don’t necessarily need to result in crashing out.

Retest 2.3: A Simple Command Line Tool to Watch File Changes — Retest is made to be easy to install and work on any Ruby project to make your testing workflow more efficient.

🤖 TinyMCP: Make Local MCP Tools in Ruby and Easily Serve Them — On the AI in Ruby front, create Model Context Protocol servers quickly with this tiny library.

🧠 Build Intelligent Applications with Rails — Learn about the strengths of Ruby and Rails in the AI era and why we choose them for AI applications development.

Custom Domains and SSL in Rails Development — Using custom domains and SSL in local development not only looks nice, but can make a variety of ‘secure context’ only browser features work too.

Concurrent Web Crawling in Ruby with Async — Even if you don’t need to crawl anything, more Async demos in the wild is a good thing.

A Series on Enumerable’s Loveliness — A celebration of the lovely expressiveness of Ruby’s Enumerable methods for solving problems. He then ran two rounds of benchmarks, concluding that writing expressive, readable Ruby first is a good idea, but it never hurts to benchmark and tune afterwards.

Don’t Hire FastRuby to Upgrade Rails. Just DIY it 🚀 — What do next_rails, skunk, and RailsBump.org have in common? All are open source tools maintained by the FastRuby team. Ready to ship your next Rails upgrade? Check out 8 tools we use in our fixed-cost, monthly maintenance services.

Don’t Hire FastRuby to Upgrade Rails. Just DIY It 🚀 — What do next_rails, skunk, and RailsBump.org have in common? They're all open-source tools maintained by the FastRuby team to help you ship your next Rails or Ruby upgrade. Check out 8 tools we use in real client work (free and ready to use).

🧠 Smart Augmentation: It's Not Always About Scaling the Team — How we helped a client achieve a shorter cycle time, lower infra costs and an improved communication.

🤖 Anthropic SDK for Ruby v1.0 — An official Ruby library for Anthropic’s various APIs to work with its popular Claude LLMs.

OSV: A High Performance CSV Parsing Library — OSV brings a popular Rust-powered CSV parser to the Ruby world and boasts significantly faster performer than Ruby’s own csv. It’s highly configurable, supports numerous input sources (file paths, gzipped files, IO objects, strings), hash and array output formats, whitespace trimming options, and more.

Don’t Measure What's Easy. Measure What Matters — Imagine Lord Business stops obsessing over story points. Data informs decisions—instead of controlling people.

Managing Postgres Table Partitioning in Ruby — If your app uses a lot of data, Postgres’s table partitioning can offer a simple, transparent-to-Rails way to avoid many associated large data performance issues. Honeybadger has also created a gem to make it even easier to manage.

It’s TRUE, SQL Supports Booleans — A tip for doing things in Active Record in a way that’ll work across database implementations.

Ruby Namespaces 101 — Last week we featured a proposal to introduce virtual top-level namespaces to Ruby, and Xavier Noria has put together a more accessible digest of what they are, how they work, and how you can actually give them a try for yourself in an early form.

Fast Allocations in Ruby 3.5 — Tenderlove never rests! His latest post shows his work in Ruby 3.5 for slashing object‐allocation costs (up to 6× faster for keyword-heavy constructors). He walks us through the techniques behind this win and leaves us buzzing for 3.5’s eventual release later this year.

Serving Large Files in Rails with a Reverse Proxy Server — Serving large files directly through an app is rarely the best or most efficient way to do it. Luckily, Akshay shows us a better way in quite some depth.

A Proposal for Defining Virtual Top Level Namespaces — The idea is that defined namespaces can load libraries and dependencies and keep them separate from other namespaces. Numerous benefits are promised like avoiding issues with globally shared objects, name conflicts, or version conflicts. There’s an interesting blend of support and criticism in the responses.

Rails Upgrades: The Good Parts — Trust the agency behind the Standard Ruby tools used by 20,000+ projects. Complex upgrades for GitHub, Gusto, and Zendesk. We set you up for independent, painless, and iterative future upgrades. Flexible contracts, no retainers, no subscriptions.

ZJIT Has Been Merged Into Ruby — ZJIT, a new JIT compiler from the YJIT team, has just been merged into Ruby after Matz’s approval. ZJIT takes a different, more traditional approach to YJIT – all explained in the post – with the hope of being easier for developers to understand and contribute to. Both ZJIT and YJIT should be in Ruby 3.5, but...

Ruby 3.4.4 Released — The latest minor release includes a fix for a YJIT bug as well as a build issue on Windows. Due to the importance of these fixes, it has been released ahead of schedule, meaning Ruby 3.4.5 is now expected in July.

🤖 Building a 'Coding Agent' in 94 Lines of Ruby — Inspired by a Go article that used 100 lines, Radan shows how Ruby can be used to build a (somewhat) functional coding agent in even fewer lines of code. It leans a lot on RubyLLM, but this is still very cool.

Amazing Print 1.8: Pretty Print Your Ruby Objects with Style — A fork of AwesomePrint that continues to get updates and an essential tool for ‘pretty printing’ Ruby objects. There’s nothing new but v1.8 formally adds Ruby 3.4 support.

🔥 Executing Structured AI Workflows with Shopify Roast — Roast is a new framework for creating structured AI workflows which are defined in YAML files, for things like evaluating tests, static analysis, doc generation, and more.

🤖 Make Your Next Heroku Upgrade Delightfully Boring with Bonsai — The humans behind RailsBump.org  offer fixed-cost upgrade services. Let our AI-powered process get you there, faster.

🔭 Astronoby 0.7: Compute Astronomical Data and Events — Load in ephemeris files that are used in astrometry to locate various space objects and calculate things like transit times, moon phases, and such things. The project wiki provides some examples, as does this blog series by Rémy.

Semian: Added Resiliency When Calling External Services — A library from Shopify we first linked exactly eight years ago! Semian intercepts resource access by several different libraries (e.g. mysal2, redis, Net::HTTP) and ‘fails fast’ when said external resources are slow or unresponsive.

'How We Fell Out of Love with Next.js and Back in Love with Rails' — The book reading/tracking service Hardcover has been working on a big migration from the Next.js world to using Rails coupled with Inertia.js to maintain a React-powered SPA vibe. This post goes into a lot of detail about how they made it work and will be useful for anyone looking...

🤖 OpenAI's Ruby API Library — A reader wrote in to point out that while there are now numerous Ruby libraries for working with LLM platforms, OpenAI now has an official Ruby one of its own, though curiously it’s not on the RubyGems registry yet.

Is Your Ruby App’s Postgres Database Prepared for Your Next High Traffic Event? — Catch this on-demand video where Postgres expert Lukas Fittl walks through features to tune slow queries, catch regressions, & keep it running at its best.

Ivar: Ruby’s Missing Instance Variable Typo Warnings — Ivar automatically checks for typos in instance variables, and rather than just drop the code, Avdi gives us a complete tutorial to demonstrate its value. GitHub repo.

3D Charts and More with JRuby and JFreeChart — Following up on his recent post about using JRuby to work with JFreeChart, Charles demonstrates how to get even more impressive results in the form of an elaborate 3D chart.

😵 Heroku-20 Hit EOL on 4/30. Need to Upgrade to Heroku-24? — The team behind RailsBump.org can help. Let our AI-powered, battle-tested process get you there faster. 🤖

Developing a Voice AI App in Rails for Drive-Through Ordering — Ruby and Rails AI content is everywhere these days. Here, Jose enhances a Rails Voice AI app (created in a linked YouTube video) with automatic transcription.

Multistep Forms in Rails with the Wicked Gem — A thorough walkthrough. Wicked is a long-standing gem for managing step-by-step ‘wizard’ processes in Rails controllers.

Memetria K/V: Efficient Redis & Valkey Hosting — Memetria K/V hosts Redis OSS and Valkey for Ruby apps, featuring large key tracking and detailed analytics to manage and optimize application data effectively.

How Contributions to RubySpec Look Over Time — RubySpec (started in 2006 as part of Rubinius) is the executable Ruby specification used by interpreters to ensure they implement the language correctly. Looking at the contributions over time mirrors the history of numerous Ruby implementations and is interesting to explore.

Rails Is Super Easy to Upgrade … — … as long as you're on 6.0 or higher. You don't need to pay a retainer to keep Rails up-to-date, but if you're stuck on Rails 5, 4, or 3, or a custom fork of 2 (we’ve seen it!) you might need help getting over the hump. Ready to enter the 2020s?

ruby-mcp-client: An MCP (Model Control Protocol) Client Library — We’ve recently highlight Fast MCP which provides a way to create MCP servers from Ruby – this project provides the other angle, giving you a way to use MCP servers, such as an AI agent would. Even if you don’t use AI, this could provide an interesting alternative to certain APIs.

🚀 Need to Upgrade to Rails 8.0 and Ruby 3.4 but Not Sure How? — Your 0-downtime upgrade journey begins with a Roadmap. Know how long it will take before you begin.

HUGLO: A Forthcoming Hyper-Ultra-Giga Low-Overhead Tracing Profiler — A tracing profiler that captures function calls, system calls, thread state changes and GC activity with overhead “low enough for continuous use in large-scale production systems.” It’s not open source yet but Matt says if there’s enough interest he’ll consider it..

The Ultimate Guide to Scaling Sidekiq — Ooooh, pretty diagrams! Yeah I made them myself and I think they’re quite nice.

Itsi: A Fast, New Ruby Rack Server — Itsi is an interesting new player joining the world of Ruby app servers. It’s written in Rust, is Rack compliant, and works as a reverse proxy, API gateway and static file server. You can choose between a typical blocking model, an (optional) fiber-based scheduling approach, or even mix the two in a hybrid model.

Sharding a Real Rails App (Mastodon) with PgDog — PgDog is a Postgres proxy server that can be used to shard data and route queries appropriately.

Streaming LLM Responses with Rails: SSE vs. Turbo Streams — If you want to get the results of LLMs into the hands of users ASAP, streaming is the way to go, but in a Rails app there’s more than one way to pull it off..

Inline RBS Comments Support for Sorbet — The story of how engineers at Shopify added support for inline RBS typing comments to the Sorbet static type checker. It’s still experimental but could hugely improve the DX of using types.

📊 Ruby Gem Analytics Powered by ClickHouse and Ruby Central — How would you like to quickly run SQL queries to do analytics over every single Ruby gem download since 2017? Now you can. There’s a lot of interesting data in here, and it’s a fascinating collaboration to boot.