Serviz - New release with Workflows

Serviz provides a minimal “command object Interface” for your Ruby apps. There are several gems in this space, but this one provides a really small API and footprint (code is around 80 lines). [more inside]

Async render in Rails

allows you to squeeze 5-15% of performance of your existing Rails app with just a few lines of code.

How to Use the Map Method in Ruby

ClusterKit: High-performance UMAP and clustering for Ruby

ClusterKit brings state-of-the-art dimensionality reduction and clustering algorithms to Ruby through native Rust bindings. Run UMAP, PCA, K-means, and HDBSCAN directly in your Ruby process with performance matching Python’s scikit-learn - no Python required. [more inside]

How to edit images with Gemini

This post documents how to edit an image with Gemini + llm.rb

Improving a similarity search with AI

We replaced a broken similarity search with AI that understands context and intent over specs. Results went from chaos to relevant overnight. [more inside]

Install any ruby version in minutes

3 step process to get you up and running in less than 15 minutes [more inside]

Live tests in Ruby on Rails

Did you know you can execute live tests on your Rails apps? In this blog post I will explore the available tools and the small changes we need to introduce live tests in our flow. [more inside]

User-Specific Content in Turbo Stream Partials

5 Core Ruby on Rails Mental Models for Ruby Enumerators

Exploiting the two recent Rails CVE

I wrote a short piece about how the the two recent Rails CVEs could be exploited:

dsa.rb: Practice core dsa in Ruby from the command line

My first open source Ruby tool: [more inside]

*NEW GEM* ActsAsActive: Plug-and-play activity tracking for ActiveRecord

ActsAsActive is a plug-and-play Rails extension that adds activity tracking to any model. It wires a polymorphic association and records Activity rows on the lifecycle events you choose, then surfaces daily counts, streak analytics, and heatmap-friendly data. Works with PostgreSQL or MySQL/SQLite and ships with a metadata column for extra context—plus a namespaced model (ActsAsActive::Activity) and generators so you can set it up in seconds. Feedback and PRs welcome. [more inside]

The Long Game: why Rails survived the hype cycle and what it means for your startup

Just a few years ago, Rails was supposedly “dead.” The framework that once powered 90% of Y Combinator batches had lost favor. Shiny new alternatives took center stage. Rails was declared passé. But now, Rails is thriving. [more inside]

Apple Wallet Passes in Rails Apps

Keeping our users engaged beyond just opening our web application can significantly boost retention and user satisfaction. That’s why integrating with Apple Wallet allows us to put our content directly on users’ lock screens and in their daily workflows. In this article, we will integrate Apple Wallet Passes in Rails to create signed passes that users can add to their phones with a single tap. Full article on our technical blog:

Exploring CVE-2025-55193 - ANSI escape injection in Active Record logging

After last week’s security patches in Rails, I tested the ANSI escape injection vulnerability. I was curious about the damage it can do. [more inside]

Age estimation with llm.rb

This post looks at how we can build a tool that estimates the age of the person in a photo with the llm.rb library. The post demonstrates three key llm.rb features at once – multimodal prompts, image vision and generation, and structured outputs.

Ruby Ternary Operator (?:) and How it Works

Rails Charts now with eCharts v6

got an update, now bundled with the most recent eCharts v6

OasGrape: An Alternative for Generating Your API Documentation in Grape

I introduce a new gem for generate an OAS 3.1 in your Grape APIs:

The RAG pattern in 32 lines of Ruby code

This post introduces the Retrieval Augmented Generation (RAG) pattern in only 32 lines of Ruby code, and includes a live demo.

Upscaling images with AI

Learn how we improved image quality for thousands of boat listings using artificial intelligence, with the objective of improving the user experience and conversion rates. [more inside]

Circuit breakers and Ruby in 2025: don't break your launch

Adopting a circuit breaker pattern from day one? Our new post explains this approach and how it can now fit into Ruby projects of any size. Plus, we showcase a gem to help you contain cascading failures before everything flat lines. [more inside]

Extend ActiveStorage for Ruby on Rails with Custom Previewers

We’ll dive into how ActiveStorage handles uploaded data and how to extend this process in the second part of this two-part series:

A set of useful extensions for RSpec

With you can print logs while running specs, define ENV variables, or change locales, etc. All with meta tags in specs. [more inside]