Programming Tutorials

From Eval to Production: A Ruby and Rails Approach If you read the first article, you now have a set of evaluators that can score your LLM

I am releasing AI Git, a tool that generates Git commit messages using local language models. It currently supports Ollama and is available on RubyGem

If you write Ruby, you will eventually get curious about Elixir. The creator of Elixir, José Valim, was a huge figure in the Ruby on Rails community.

After my work on telegem (a Ruby gem for creating DSLs), I began to notice the stark differences between interpreted and compiled languages. Ruby is

After my work on telegem (a Ruby gem for creating DSLs), I began to notice the stark differences between interpreted and compiled languages. Ruby is

Your AI-powered Rails app is ready. Kamal is your deploy tool. Now you need a server that actually runs it — the old-fashioned way: Nginx, Puma, syste

Sometimes I find myself starting a new Rails project, and almost immediately, I hit a wall: User Permissions. Guests can read posts, users can edit

Solo founders fail for a completely preventable reason. It’s not because their idea was bad, and it’s not because they couldn't code. It’s because the

These days, the moment a problem gets stuck in our heads, we turn to AI for help. We explain our problem, it gives us some answers. How accurate or hi

We've spent 27 posts writing code. Now it's time to put it on a server. Not a managed platform. Not a serverless function. A real server that you con

You built the AI features. You tested them. You cached the hell out of them. You hardened your background jobs. Now you need to know when things brea

For those of you who prefer CLI or need to test their gems in a CI pipeline or AI workflow: Gemtracker offers CLI export features. It supports 3 outp

If you maintain Ruby apps, you already know the drill: run bundle outdated, then bundler-audit, maybe fire up Trivy for extra security, and still end

AI workloads are different from typical web jobs. They're slow, expensive, rate-limited, and sometimes they just fail for no good reason. Your backgro

Every Rails app you deploy is a target. The moment it's on a VPS with a public IP, bots will probe it. This post covers the security essentials every

There are Rails applications that run incredibly fast on a developer's laptop, but the moment they are deployed to production, they crawl to a halt. T

Your AI features work. Your tests pass. But every time a user asks a question, your app hits an external API, waits 2-5 seconds, and burns tokens. Mul

Welcome back to the Ruby for AI series. You've built AI features — chat interfaces, RAG pipelines, image generation, voice transcription. Now comes th

Stop Using SQL LIKE: A Step-by-Step Guide to Elasticsearch in Rails When you build a standard Rails app, searching your database usually st

Webhooks are one of those super simple but really powerful tools that almost every developer has needed to use at least once. From Stripe, GitHub to P