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Design for Developers: How to Stop Making Ugly Apps
The “Blank Page” Paralysis You have the database schema planned. You have the models… [more inside]
3 Robots walk into a room ...
I call my LLM-based service objects robots instead of agents. Why? because robots do what you tell them. Agent have agency. That means they can make choices and do whatever they want to do. Like travel agents, real-estate agents, FBI agents. Robots are machines that follow instructions. That’s what I want. My objects should follow my instructions… but what happens when you add a little bit of agency to 3 robots and put them into a room with a set of tools that allow them to communicate with eah other through shared memory, broadcast message channels and direct message channels. Then you tell all 3 robots to do the same thing? They become a self-organizing group. SOGs have agency. [more inside]
Stop wasting time creating dummy files for your tests!
fake-file: A lightweight Ruby gem to effortlessly mock and generate files for your tests. I’d love to get your feedback or see your PRs!
Evaluating LLM prompts in Rails
Finding the right model and prompt for your AI feature is harder than it looks. Spreadsheets help, until they don’t. So we did something about it. https://sinaptia.dev/posts/evaluating-llm-prompts-in-rails
Introducing Icons: add any icon library to your Ruby app
https://railsdesigner.com/introducing-icons-gem/ Almost two years ago I published Rails Icons; now the core is extracted into a new gem for any Ruby apps: Icons [more inside]
Why Your Next Rails App Doesn't Need Nginx or Apache
The “Nginx Tax” For the last 15 years, deploying a Rails app to production involved a… [more inside]
Scraping at Warp Speed: Parallelism vs. Concurrency
The 100,000 URL Problem You’ve been tasked with scraping a massive product catalog. You… [more inside]
Test Driving Rails v1.1 (a Minitest & Fixtures book) is released
A new revision for the 1st edition of Test Driving Rails is released. Comes with database optimizations and Claude Code skills.
llm.rb v4.1.0 is out
The feature-rich, zero-dependency, and flexible Ruby toolkit for talking with multiple LLMs has had another release. Since the last announcement, which was many releases ago, a lot changed. Check out Github for more info.
The Captcha Wall: Solving Challenges Programmatically with Ruby
The Ultimate Boss Battle You’ve optimized your headers. You’re rotating residential… [more inside]
Meet Vessel: The "Scrapy" of the Ruby World
The Missing Piece In the Ruby scraping ecosystem, we have excellent low-level tools. … [more inside]
Testing the Unstable: How to Write Tests for Scrapers
The Scraper’s Dilemma Testing a normal Rails app is straightforward: you control the… [more inside]
The $0 Infrastructure: Launching a Rails SaaS for Free in 2026
The AWS Fear Factor The biggest blocker for many developers starting a side project isn’t… [more inside]