AI is bringing back into fashion something that we thought was only for geeks: the command line

At first it was the command line.

It was 1982, maybe 1983, and I first saw a ZX Spectrum 48K. That fascinated me not only because of the noises and beeps and colors and crappy and wonderful games, but because you wrote something on the screen in text mode and suddenly things happened. I would end up having a C64, which of course was far better 😉 but that’s another story.

Then, a couple of years later, a personal visit to the IT department of El Corte Inglés, which was one of the few places where one could no longer see computers, but touch them. That was like the Apple stores of today, and preteens and not so preteens came there not to see machines, but to feel them.

There were PCs there, of course. Boring and gray and yet also wonderful. And the first thing they did when they turned on was ask the date and time to adjust their internal clocks, and I was amazed and thought in my innocence, “Oh my God, how clever is he that he asks the date and time to be super updated.” And immediately afterwards, of course, the MS-DOS logo appeared and that terrible and magical prompt at the same time (or a similar one, because I doubt they had a hard drive):

C:\

I was little, but human-computer interaction had long been dominated by that technology: the command line. You wrote, the machine responded. The UNIX systems did it before, the “operating systems” of the Spectrum or the C64 later, and of course it was also done by that MS-DOS that seemed amazing because once again I, in my innocence, did not even know that there was already a brilliant crazy visionary out there who was selling some simply amazing little machines with a 7-inch screen that They greeted you with “Hello, I’m Macintosh”.

Everything changed (quite) quickly and suddenly the command line became somewhat awkward, clunky, obsolete. Everything had to be visual. Windows and graphic elements evolved so that we wrote less and clicked (not to mention scrolled) much more. And in the last 30 years we have not stopped doing that and defending that the graphical interface was perfect for humans and for most scenarios in which we have to talk to our machines.

And it was. And it is. But AI has changed that.

Hello again, CLI

The explosion of generative AI has turned this situation 180 degrees. It is true that in recent years we have used AI through (mostly) a browser or a mobile app that was actually an embedded browser, but over time we have seen that if we wanted AI to do things for us, there was a problem.

Than to AI has a hard time seeing and working with a graphical user interface.

But at the same time there were those who realized that what AI did like angels was work with a command line interpreter or CLI. It suddenly made sense to use the terminal again or our computer consolebecause the AI ​​felt at home with it. I didn’t have to recognize and interpret the screen: I just had to read it, and that was wonderful.

That is why we have seen how Claude Code (or Codex, or Gemini CLI, or similar tools) has become an absolute marvel. One that suddenly returned us to the command line and a terminal in which we felt like we were in the ZX Spectrum that I saw when I was 9 or 10 years old. You wrote and the machine responded, and here it was the same, but of course, wildly.

What seemed like something relegated to the realm of programming is slowly making sense for many other scenarios. You can actually use Claude Code or Codex like you use ChatGPT, for chatting, but it seemed like they could only be used for programming. And not.

We are seeing how more and more solutions designed to take advantage of the power of generative AI are programmed with a text interface, for the command line. Those tools They are designed to be used much more by an AI than by a human. They also come in there the MCPs that connect AI models with tools and services like Slack, GitHub or AWS, and if those services have their own versions of themselves in text mode, the AI ​​will be able to use them much better and much more efficiently.

We have the last example in Google Workspace CLIa platform that allows Drive, Gmail, or Calendar to be used from the command line. It is not designed for humans—although we can use it—but rather for AI models to take advantage of it. It’s a gift from Google to the machines, and one that is not at all generous: what the company wants here is to convince the machines to use its services. The humans have already won.

It’s just an example, because little by little we see how the command line is experiencing a second youth. We no longer only talk about the GUI (Graphical User Interface), but from the TUI (Text-based User Interface). It is something that has always had its place, especially in the Linux operating system, where tools like btop or Neofetch showed that text can be (very) pretty, but now. These are just two examples, because there are dozens of them. Hundreds. Probably thousands. Not necessarily beautiful, but efficient and functional, like mutt (mail client) or Midnight Commanderlegendary file explorer in text mode.

For AI, these types of apps are wonderful, because I insist, it does not have to make an effort to understand what is happening: it reads text at full speed and understands and acts. And that is vital for those AI agents who are beginning to conquer everything and everyone.

OpenClaw, for example, is showing us that potential future in which an AI does almost everything for us on a machine, and those who have tried it know (we know) well: doing things in the browser usually causes problems because browsers protect themselves against bots that, for example, try to overcome CAPTCHAS, and that is why this and other AI agents try to use other web navigation methods such as the famous curl command. If we manage to “translate” the visual language of the web to a text-mode user interfaceAI agents will be more powerful and capable than ever.

We don’t know if that will happen, but what is certain is that the world has understood that if we want AI to do things for us, the visual interface is an obstacle that we must get rid of.

And that’s why we’re reliving a fascinating return to the past. The command line returnsand he does it with great force.

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