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The Miners

Codeminer42’s Engineering Blog

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Building a Practical AI Agent with RAG, MCP, and Ollama How I built (and iterated on) a production‑ready AI agent that actually works with real data

Building a Practical AI Agent with RAG, MCP, and Ollama

How I built (and iterated on) a production‑ready AI agent that actually works with real data

emerson.arakiby emerson.arakiFebruary 19, 2026March 10, 2026

Introduction Over the last year, “AI agents” went from a buzzword to something people actually try to ship. And if you’ve tried to build one …

Everything you should know about Background Jobs with ActiveJob

Everything you should know about Background Jobs with ActiveJob

Lucas Geronby Lucas GeronFebruary 12, 2026February 13, 2026

Orchestrating background tasks (or "jobs," as they are often called) is common in web development. Any application that deals with time-consuming operations, such as sending …

How To Sandbox Your AI Agent Using Docker

How To Sandbox Your AI Agent Using Docker

Edy Silvaby Edy SilvaFebruary 3, 2026February 9, 2026

Docker just released a really exciting update to Docker Sandboxes, a feature that allows running AI agents, like Claude Code, in isolated environments. This change …

How To Build An AI Agent For Talent Matching – Part 2

How To Build An AI Agent For Talent Matching – Part 2

Paulo Tarsoby Paulo TarsoJanuary 29, 2026February 9, 2026

In the first post of this series, our great Edy Silva tried multiple approaches for a Talent Matching system that would work for our little …

Claude Code + Ollama: Stress Testing Opus 4.5 vs GLM 4.7

Claude Code + Ollama: Stress Testing Opus 4.5 vs GLM 4.7

Edy Silvaby Edy SilvaJanuary 26, 2026April 28, 2026

Ollama just made it possible for you to use their models inside of Claude Code. To test Claude Code capabilities and compare top open models …

Women in Tech: Margaret Hamilton The woman responsible for helping put men on the Moon

Women in Tech: Margaret Hamilton

The woman responsible for helping put men on the Moon

Iasmim Cristinaby Iasmim CristinaJanuary 21, 2026February 18, 2026

"I guess I should delay graduate school again because I’d like to work on this program that puts all these men on the Moon." When …

AI at scale – Lessons from QCon AI New York 2025 And why we can’t forget what we learned

AI at scale – Lessons from QCon AI New York 2025

And why we can’t forget what we learned

Talysson Oliveiraby Talysson OliveiraJanuary 13, 2026

In addition to doing our own experiments, learning from others experiences is one of the best ways to deeply understand a subject, especially in new …

How AI Wiped Out 80% of Tailwind’s Revenue

How AI Wiped Out 80% of Tailwind’s Revenue

Edy Silvaby Edy SilvaJanuary 8, 2026January 8, 2026

Tailwind CSS, you probably know what it is. A utility-first CSS framework that has taken the web development world by storm. It’s the default of …

Codeminer42’s 2025 Year in Review: Community & Open Source

Codeminer42’s 2025 Year in Review: Community & Open Source

Edy Silvaby Edy SilvaJanuary 7, 2026March 11, 2026

In 2025, Codeminer42 was proudly involved in several community initiatives, from sponsoring conferences to contributing to open source projects. Here’s a quick recap of our …

What’s new in Ruby 4.0

What’s new in Ruby 4.0

Edy Silvaby Edy SilvaDecember 18, 2025December 18, 2025

It is that time of the year again! As tradition dictates, Christmas is approaching, and with it comes the gift of a new Ruby release. …

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