Comment by pdimitar
8 days ago
> But the whole point of their product is that it supposedly nullifies such "business" concerns around the use of technology, by making it cheap and fast to build whatever you like automatically.
This is a spectrum, it's not just 0% vs 100%. Even Fable frakked up a few things really badly in my professional work (though to its credit after a very detailed 2h chat it self-corrected and fixed all the blunders).
I would also challenge "fast" -- Fable (and I assume Mythos) are wicked fast and efficient and even they can't compensate for f.ex. slow recompilations or test suite reruns or security scans, linters etc.
Reminder that the Bun's Zig-to-Rust rewrite took 11 days with dozens of agents working 24/7 and the author put the cost they'd pay (if they had to pay) at about $168k.
> $168k
Billions of dollars of annual revenue go through Claude Code, and the people who work on it must be a lot of millions in headcount.
The time matters a fair bit, it's probably time someone can't spend breaking things in the name of new features, but if rewriting the stack had even a tiny impact on retention or driving higher usage, it would pay back that $168k.
If only paying the $168k was some sort of a guarantee. Vibing doesn't give you that.
You might get more maintainable code for $168k by hiring humans, but if its something bespoke it isn't going to get you far (or far quickly).
Vibing is straight out gambling right now, the thing is, I don't know who the house is any more.
It's going to take an order of magnitude longer though, delaying any of that revenue significantly. I'm sorry, but we're talking 11 days here. What does "maintainable" even mean with impossible time-scales like this now!?
3 replies →
.. by hiring the right humans - which is not always a given
1 reply →
The company I work for is about 15mm into what is effectively a rewrite. Just a lone data point…
Millimeters?
3 replies →
Yep, same thought. And it seems Anthropic agrees.
can't imagine rewriting a runtime to be easier than a coding harness
You might be surprised. Runtimes can be easier to test than UI for AI, and the bun rewrite was almost line-for-line translation, whereas CC likely uses many more libraries that cannot be ported directly.
The major open harnesses are in the ~800k lines of code size ( https://simonwillison.net/2026/Jul/15/grok-build/ ) and CC is the oldest and quite-likely largest judging by features.
It's really not about a PL runtime vs. an agent harness, it's about how spaghetti and complex the code is. I do get your point though.
>Reminder that the Bun's Zig-to-Rust rewrite took 11 days with dozens of agents working 24/7 and the author put the cost they'd pay (if they had to pay) at about $168k.
For an entity like Anthropic that's not even the cost of a single developer for a year. It's closer to what they pay a chef on premises.
That the showstopper for a better Claude agent is that they'd need to pay $168k or event $1M or even $10M in costs, can't be used as an excuse.
Lets see what happens in the future. From my experience cost of maintaining this amount of shitty code explodes pretty quickly. We will see in a few years if SW development in all phases using agents is that much automated and easy as people now predict.
Do you know their entire roadmap? If not, maybe different people prioritize things differently when they see their full strategic position.
How is that relevant to my response?
The argument I responded to argued that cost might be the prohibiting factor. I'm saying that for them, the costs mentioned are negligible.
3 replies →
I don't work for them and I don't know their priorities. I can only speculate they're not okay with it but no idea why exactly.
It has to have been purely a marketing move. There's no other way that acquiring a software product for millions and then completely rewriting it makes any sense.
Maybe it's one of the cases when techies call the shots?
I can understand people being more sold on Rust compared to Zig -- there are legitimate differences on the memory safety front and I can see how people will prefer one or the other.
Plus I believe Jarred (Bun's main dev) went out of his way to explain why he chose Rust over Zig in his blog post.
Of course the marketing angle might indeed be the explanation; not arguing against that, I simply followed with interest and Jarred seemed very reasonable to me.
The rewrite makes sense, it's all their dog food at that point. It's the acquisition that doesn't make sense. Why didn't Anthropic just rewrite it themselves?
2 replies →
> Reminder that the Bun's Zig-to-Rust rewrite took 11 days with dozens of agents working 24/7 and the author put the cost they'd pay (if they had to pay) at about $168k.
Does anybody really believe that it only took 11 days, one engineer and $168k in tokens?
It played out in public on the GitHub repository, so yes.
I know what Fable did for just 5x6h sessions, singular agent, for my professional work.
Jarred used many agents and they worked 24/7. It tracks for me.
So yes, I do believe it. What makes you skeptical?
100% believe it. I use multi agent orchestration within oh-my-pi and it can absolutely do targeted things like this.
[flagged]