SINAPTIA

New post! Storing multi-valued enum fields in ActiveRecord Rails' enum DSL is great for single values, but what about multiple? We compared 4 approaches across performance, extensibility, and maintainability to find the best fit.

New post: 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.

New post: AI agents in Ruby: Why is it so easy? We found two keys to answer this question while building a full-featured coding agent in just 250 lines of Ruby code.

New post: RubyLLM::Instrumentation: the foundation for RubyLLM monitoring While working on RubyLLM::Monitoring, we needed a way to instrument all RubyLLM operations. But we wanted to do it without changing RubyLLM. Read along to know how we did it.

When you're using multiple LLM providers, tracking costs manually becomes impossible fast. We needed visibility into our AI spending and LLM performance. Here's the monitoring engine we built for Rails.

la_plata.rb November meetup! On November 27th, the la_plata.rb community gathered for its first and last meetup of 2025. Observability, AI, and A/B testing. It was a pleasure to have the entire La Plata Ruby community gathered once more. Thanks to everyone who came!

What's actually slow? A practical guide to Rails performance Learn how to measure and identify slow Rails actions and their components: database queries, view rendering, and API calls.

Rails views performance matters: can `render` slow you down? In this post, we'll benchmark and analyze the most used view rendering options, the optimizations Rails provides, and when it makes sense to use each alternative (or not).

Another lovely meetup from the Ruby Argentina community in Buenos Aires on September 10th, 2025. This time, about AI Agents and Breaking Monoliths.