The Second Coming of the Command Line - Cautomaton

The Second Coming of the Command Line<br>by J. Aaron Farr<br>Jun 28, 2026<br>22 min read<br>ai<br>interfaces<br>open-source<br>unix<br>games

In The Beginning<br>Every time your right pinky slams that ENTER key, you are making another try. In some cases the [coding agent] does nothing. In other cases it wipes out all of your files. In most cases it just gives you an error message. In other words, you get many duds. But sometimes, if you have it all just right, the computer grinds away for a while and then produces something like emacs.

At the end of his novella In the Beginning Was The Command Line, Neal Stephenson imagines a cosmic operating system, with some hacker-demiurge pounding out universes with commands like:<br>universe -G 6.672e-11 -e 1.602e-19 -h 6.626e-34 -protonmass 1.673e-27....<br>He imagines:<br>Now THAT is a cool operating system, and if such a thing were actually made available on the Internet (for free, of course) every hacker in the world would download it right away and then stay up all night long messing with it, spitting out universes right and left. Most of them would be pretty dull universes but some of them would be simply amazing&mldr;

For the last six months or so, every hacker (the old school kind) has been living out this fantasy: putting the slot machine crank of AI coding agents in a loop and spitting out universes of code.<br>I find it striking that over twenty, almost thirty, years later, one of the most advanced technologies humankind has produced to date makes its grand appearance to the world as command-line interface (CLI) programs with terminal user interfaces (TUI). I&rsquo;m not sure how long this terminal renaissance will last, but even if we eventually mediate our experience down to one big button that says &ldquo;CODE&rdquo; (or in Stephenson&rsquo;s galactic example &ldquo;LIVE&rdquo;), under the hood still exist all those command line parameters turning plain text into tokens and back again.<br>Yes, it&rsquo;s the second coming of the command line and I&rsquo;m here for it.<br>As we claw our way to the rapture of the singularity, I want to pause (if such a thing is possible in today&rsquo;s environment) to consider how we got here, what lessons we can take from the fact that the CLI and text won (again), and what that hints for the future.<br>Fire up your RSS reader

That&rsquo;s still a thing, right?<br>and follow along.<br>Interfaces<br>Like Stephenson, I too grew up around an MGB. My father&rsquo;s white whale did, every once in a while, actually run well enough to get on the road. Luckily, I was old enough to experience the rack and pinion steering, the manual transmission, the tight hugging of Western PA country roads. This was driving as a truly visceral experience, with little between you, the machine, and the road.<br>We&rsquo;re now well beyond the mediated experience that Stephenson lamented, automatic sedans that protect you from the road rather than force you to face it. Today, a Waymo

I actually do enjoy a Waymo. They&rsquo;re some of the better drivers on the road in my opinion.<br>in Los Angeles lets me &ldquo;drive&rdquo; around the westside without ever having to look up from doomscrolling.<br>This intermediation of the experience of technology is not necessarily a bad thing. Even Stephenson admits to enjoying Disneyland now and then. Tech, and the advantages it affords, is so much more accessible today than it once was. That&rsquo;s ultimately a good thing, even if it leads to a younger generation being unclear what a &ldquo;desktop&rdquo; is, let alone a directory or folder.

Funnily enough, even the desktop was a metaphor too far for Stephenson&rsquo;s take.<br>Now, despite my Linux and emacs ways, I generally encourage and applaud making technology easier and more accessible, but that process of intermediation is not neutral.&oplus;

Or as Father John Culkin put it, channeling McLuhan: &ldquo;We shape our tools and thereafter our tools shape us.&rdquo; Often misattributed to McLuhan himself, Culkin wrote it in A Schoolman&rsquo;s Guide to Marshall McLuhan (1967).<br>It&rsquo;s a universe of its own of choices, many of which are surprisingly ethical and moral in nature. The control of the interface is the control of who is in control : you? the developer? the corporation? the AI?

This balance of power we&rsquo;ve played out in the technology industry for decades has new rules and players, most notably the AI model itself.<br>Universal Interfaces<br>When I first started thinking about this article, I was initially struck by the apparent ascension of text and the terminal. The Unix Philosophy vindicated. Here we were, advancing some of the most powerful technology yet, and the most natural interfaces were CLIs and TUIs. Hell, we have people launching products and startups to help you with your latest VC-backed TUI. Turns out, pipes of (structured) text are pretty powerful. Who knew?<br>This might seem obvious, but let me give you a counter example. Over in the game...