This blog exists so that you finish every article knowing something you did not know before, and able to use it the same day.
One half is software development that does not go out of fashion: databases, version control, testing, security. The other half is artificial intelligence applied to writing code, which is what changes fastest right now and is hardest to keep up with. Both get the same treatment: examples you can run, and nothing taken for granted that has not been explained first.
The rule for picking a topic is simple: it has to be something any developer is better off having read today. Not the newest thing, but the one that changes how you work and that you would rather not find out about late.
Every article is also available in Spanish.
Three free tools you need to know exist. One imposes a way of working before any code gets written. Another shows you where your tokens go. The third gives it design judgement. What each one does, how to install them, and what they cost you.
In almost every language, incorrect code breaks and tells you. An incorrect SQL query runs, returns rows and nobody finds out. What to check before accepting one, and what changed in the databases themselves.
Both were dragging the same flaw around: the application did more work than it needed on every change. Angular 21 and React 19 fixed it, and the fixes are exactly inverse to each other.
What you actually pay for when using a language model to write code, why the bill almost never comes from the model you picked, and the practices that cut spending most without lowering the quality of the result.
You deleted a commit, something broke and you do not know when, or you need to undo something you already pushed. Five commands almost nobody uses until they need them, explained with the exact situation that calls for each one.
