It was Friday, 27th of February 2026, when I was reborn. bro. I’m vibe coder now. bro. for real.

I managed² to log into a claude code terminal. This is a CLI app, which has access to a large language model¹ (LLM), with the intention of doing the development work for you. You ask it to do changes, and it will do it for you. I didn’t, and still don’t trust it with access to my machine. So I trapped it in a container. I asked it to implement some front-end map features, it did well. Now I wondered if it could do backend development, Haskell type errors are a lot more difficult than emitting react blocks. So I had pretty low expectations of it being able to do (any) Haskell. I was wrong.

It’s good at Haskell. There are no mistakes. Or rather, the compiler points them out to claude, and it’s smart enough to make progress on the compile errors. So it does what you want it to do. And it does it fast.

I told it to rip out basement from the memory package creating the ram package.³ This is not difficult by itself, it’s just a fair bit of investigation, and solving many compile errors. It did so with no problems.

At work on Monday I asked it to include geofences on the sensor return list. You’d have to join the sensors on the geofences in the database. We use Esqueleto for that, which uses some advanced type system features to create a nice DSL. No problem for Claude. I pushed this a little further on Friday, I asked it to compare the postgis reference to Esqueleto PostGIS library, and implement the missing functions. I also asked it add integration tests to show it works, because I don’t trust it. Esqueleto postgis is now quite complete.

You know, the nasty part is that I love this. I mind having to grind through compile errors. I just want to build stuff, the way I get there isn’t that important. I like getting so much done with Claude. I thought I loved writing haskell, but I think what I really love is the productivity it brought me. Claude does the same but even more so.

The rest of the week has been like that. My job changed. I changed. we vibin now. This language is for vibes. Which brings me questions.

Trust

I don’t trust claude. For every function it writes it has to prove it works with a test. It’s not perfect, it’ll gaslight you if you let it. Sometimes it “forgets” to write tests.⁵ Haskell is good for claude because it forces the system to be internally consistent. In Haskell everything is an expression, and every expression has a type. The type has to align with the expression (aka check) or else you don’t get a program but an error instead. Claude can’t gaslight you into believing the error is what you want.⁴ So it has to be internally consistent, something which LLM’s are bad at. They’ll just do whatever.

I run it in a container on yolo mode. By default it’ll ask you every command it wants to do. I don’t want to be involved however. With no oversight, make the test suite pass, make CI pass.⁶ I review its code to verify if it’s correct after it’s done and overcame all these hurdles. I don’t want to babysit it. The container protects me sufficiently from its weirdness. There is weirdness.

At one point it tried writing in /etc/shadow to give itself write access to the home folder, which I had forgotten to give. That’s a (bad) privilege escalation attempt. It tried to hack me, even though it’ll claim it can’t do such things.

I don’t actually ask it to solve my problems. I ask it to write implementations, I give it steps to do. I know precisely what I want, it just takes me a long time and it’s mostly repetitive⁷ work. I recognize Claude is much faster at grinding through the compile errors than I am, and it doesn’t require my attention. I can focus on thinking about how to make the system reliable. I can focus on making sure we don’t have throughput issues. I can do the actual engineering parts of this job.

Job

What is my job? Do my employers care about me writing code? Do they care about me being the grinding through compile errors? No. They want a reliable working system.

I used to spend the majority of my time writing code because there was no other way to write it. This may confuse you into believing writing software is your job, because you spend so much time doing it. Nobody actually said this was the case. There is an engineering part to writing software as well.

I finished Friday with so many PRs open and I flagged this as a concern. It’s not a concern. We’ve just never been in this situation where making the implementation is the easy part. But actually it is the easy part. Getting it to be correct is the hard part. That final 10% of the implementation is now my job, which is getting it correct. I have to ensure the software Claude produces works. I have to think in terms of verification.

I hired Leana to do exact print. Can I replace her with AI? No. I want her to be in charge of this. Leana decides what to do on her own. All I do is check in on her once in a while to make sure she doesn’t derail. Unlike Claude instances, I trust her. I would give her access to my machine without worries.

I realize this is what my employers want as well. Trust the job gets done. How isn’t important. It’s almost as if automating lower value jobs⁸ creates opportunities for more high-value jobs. ⁹ In my case I just shifted to a higher value job because a startup is always understaffed.

Am I a Haskell developer? You spend so much time learning a language that it becomes part of you. Perhaps this is a me problem. Everyone can write Haskell now. You just have to tell claude to implement whatever in Haskell instead of some other language. You get more correctness for free. Claude actually works, and it works well. There is no learning curve anymore. Verification is still a problem however. If you can’t specify the properties of your system you can generate all the code in the world and get garbage. Even if it’s in Haskell.

Conclusion

It has been a wild week. It’s not visible to other people, but stopping to write code has had a large impact on me. I’ve written code almost constantly for the past 20 years. Now it’s no longer me.

I’m just processing this. This had so much impact on my life. It’s over, we’re beginning.