Someone swapped out an IBM Quantum backend for /dev/urandom. And nothing broke.
That’s the story. And if you work in tech, you should sit with that for a moment before moving on with your day. A developer replaced a quantum computing backend — the kind of thing that gets breathless press releases and investor decks full of words like “next-generation” — with a Unix pseudorandom number generator that has existed since the 1990s. The project kept running. The results were comparable. The point was made.
This Wasn’t a Hit on Quantum Computing
Before the quantum faithful start drafting their responses, let’s be clear about what actually happened here. The people involved were explicit: this wasn’t a jab at quantum computing as a field. The target was Project 11 — and, depending on who you ask, possibly the original submission author. The critique was aimed at how quantum components get bolted onto projects not because they’re the right tool, but because they look impressive in a README.
The Hacker News thread made this distinction pretty clearly. Multiple commenters pointed out that the quantum computer component in the original solution wasn’t doing anything that justified its presence. It wasn’t faster. It wasn’t more accurate. It was just… there. Decorative. A technical garnish on a dish that didn’t need it.
The Real Problem Is How We Use New Tech
This is a pattern that shows up constantly in the AI and emerging tech space, and it’s one we cover a lot here at agnthq. A new technology arrives with genuine promise. Early adopters find real, specific use cases where it genuinely outperforms existing solutions. Then the hype cycle kicks in, and suddenly every project needs to incorporate it — not because it solves a problem, but because it signals sophistication.
We saw it with blockchain. We’re watching it happen with large language models right now. And apparently, quantum computing has not been immune.
The /dev/urandom swap works as a critique precisely because it’s so blunt. You can’t argue with it. If your quantum backend can be replaced by a pseudorandom number generator and nobody notices, the quantum backend was not doing quantum work. It was doing theater.
What the Hacker News Crowd Actually Said
The discussion that followed the GitHub post was more nuanced than the headline suggests. A few things stood out:
- Several commenters noted that the point wasn’t speed. The original quantum implementation wasn’t being criticized for being slow — it was being criticized for being unnecessary.
- Others pushed back on the framing, arguing that the swap missed the point of what the project was trying to demonstrate in the first place.
- A fair number of people just appreciated the audacity of the move, regardless of the technical argument underneath it.
That last group isn’t wrong. There’s something genuinely useful about a demonstration this stark. Academic papers and conference talks can argue about quantum advantage in the abstract for years. Replacing a backend with a 30-year-old Unix utility and watching nothing change is a different kind of argument — one that’s hard to dismiss with jargon.
What This Means for Anyone Evaluating AI and Quantum Tools
At agnthq, we review tools based on one question: does this actually do what it claims to do, in a way that matters for real work? The /dev/urandom incident is a useful reminder of how to apply that standard.
When you’re evaluating any tool — quantum, AI, or otherwise — the question isn’t whether the underlying technology is real or impressive in a lab setting. Quantum computing is real. The physics works. There are genuine problems where it will eventually outperform classical approaches by a significant margin.
The question is whether the specific implementation in front of you is actually using that technology to do something meaningful, or whether it’s using the name of that technology to sound credible.
Those are very different things. And a simple swap to /dev/urandom is apparently all it takes to tell them apart.
A Useful Test, Actually
If you’re building something that incorporates a quantum backend — or any exotic, expensive, or complex component — ask yourself whether a simpler substitute would produce the same result. Not because simpler is always better, but because if the answer is yes, you probably don’t understand what your complex component is actually contributing.
That’s not a knock on ambition. Building with new technology is how you learn where it actually fits. But shipping something with a quantum backend because it sounds good, and then having someone prove the point with /dev/urandom? That’s a code review you don’t want to go viral.
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