Domain 2 is an important topic as well, because you should understand it if you want to be an effective agentic developer. It includes 5 subtopics: 2.1 Design effective tool interfaces with clear descriptions and boundaries It is all about tool de...

I decided to create a comprehensive preparation guide for the Claude Certified Architect Foundation exam. First, creating this guide helps me focus on the details and prepare more thoroughly for the exam. Second, I would like to share what I have lea...

While browsing bugs.php.net1, I found an interesting ticket2. Someone reported a surprising behavior, and I wanted to understand what is happening under the hood—because I think this is a really important concept to understand in PHP internals. Cons...

Security has always been an evergreen topic. Protecting your environment, reputation, and company assets from financial and reputational damage is critical. For today’s developers, it is no longer enough to know language syntax, design principles, or...

Doctors have a saying: primum nil nocere — “first, do no harm.” I first heard it in a medical context, but it stuck with me. Could the same principle apply to programming? Absolutely — especially when working with legacy code. If you work on legacy ...