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Claude Code uses Bun written in Rust now

simonwillison.net

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Re: Claude Code uses Bun written in Rust now

#301

Post by skydhash »

conartist6 wrote: post #179
nicce wrote: post #150

Earlier quoted context omitted.

> TS7 is going to cause problems for downstream users because Go is the wrong language to use for something that has to run in WASM. Is there a huge need to run that typechecking on browsers?

First, yes, the demand to be able to code natively in a browser is, I have reason to suspect, very large. It's just difficult to measure demand when nobody has ever offered a really compelling product. In engineering terms it's like getting a full-scale reading. The real level could be 1% above a full-scale reading, or the real level could be 100x higher than the full-scale reading. Secondly, WASM isn't the right tar…

> If you want to build a cross-platform UI product that doesn't require installation and has Emacs-like levels of extensibility, JS is the end of the line in terms of language selection. There are no other candidates.

calibre (with python+Qt) begs to differ. And I believe VLC runs on every current platforms. There's also Code::Blocks and Blender. Cross-platform UI is not rocket-science.

Re: Claude Code uses Bun written in Rust now

#302

Post by ethbr1 »

kstenerud wrote: post #203
ethbr1 wrote: post #199

Earlier quoted context omitted.

> How do you know it's vibe coded slop? Have you seen the source code? I believe you've just made your opponent's point for them.

Have I? I believe I've merely chased them around their moving goalposts. When it's closed source, that's nefarious because "they're not sharing" and that's against the whole spirit of open source. When it's dogfooding with a reduced audience, it's "shoving vibe coded slop on people" (this information gleaned through magical knowledge). When that unfounded assertion is called, lo and behold: It's closed source, so bad…

More to the point, because you've been chasing them around goalposts, you've both accepted that the question at hand is unknowable precisely because the source isn't available.

> Do you believe in "guilty until proven innocent"? Do you believe that they're doing bad things with the bun code, and you can't be convinced otherwise in your judgment of them until they release the code?

Hell yes, and anyone who trusts one of the AI labs for anything important is insane.

Whether it's their initial mass piracy and then lying about it, dealmaking with the US government, or continually shifting opt-out lines on what they are and aren't training on, they haven't earned the trust to skip the "but verify" step.

Their economic incentives are too transparently aligned with ends at any costs.

Re: Claude Code uses Bun written in Rust now

#303

Post by [deleted] »

rjzzleep wrote: post #120
jasode wrote: post #83

Earlier quoted context omitted.

>Literally who cares what language a JS toolset is written in? Maybe you're being coy by asking a rhetorical question you already know the answer to but I'll answer as if you asked sincerely... There are 2 different groups interacting with software products: (1) end-users : this is where the "Who cares what language it's written in?!?" is usually applicable. E.g. The finance guys using MS Excel don't care whether it'…

What about Group x. You just AI generated 1 millions lines of code claiming it's for safety. Who exactly is to make any kind of security guarantees about this?

[deleted]

Re: Claude Code uses Bun written in Rust now

#304

Post by weakfish »

AndrewKemendo wrote: post #267
weakfish wrote: post #249

Earlier quoted context omitted.

Because I’ve been told that Fable can do anything :-) My question is moreso “why was it ever JS in the first place” & the cost of a native rewrite would be cheaper than acquiring Bun no matter how you shake it

>Because I’ve been told that Fable can do anything I hear some version of this anecdote constantly yet despite using all these prompting tools since 2019 I have never once heard a lab or professional say “x model can do anything” Can you provide me whatever specific source you heard for this?

It’s hyperbolic and intended to generalize the sentiment I perceive from others.

Dario Amodei said in January that he expected software engineers to be replaced [0], so I suppose the quote should be extended to “can do anything… a software engineer can do”

And I think we can all agree that SWE is on the more complex end of all white collar jobs. So, my thinking is that if SWE can hypothetically be replaced, so can many other jobs. Hence, the claim the models can “do anything” intending to capture the majority of white collar work.

This, of course, is if you take their claim at face value - which I certainly do not.

[0] https://www.entrepreneur.com/business-news/ai-ceo-says-softw...

Re: Claude Code uses Bun written in Rust now

#305

Post by Sammi »

CrimsonRain wrote: post #260
gabrieledarrigo wrote: post #14

Bah. Personally my take on the entire affair is quite negative, whatever Jarred or Simonw says about it. I think Bun owned by Anthropic and the entire rewrite with AI is not the real point (even if it's quite interesting, though). My take is that Jarred, and Bun,didn't demonstrate a serious, adult approach, from "this is my branch, you are overreacting" message to just proceeding with a 1mil+ PR merged in less than m…

[flagged]

"Normal users" haven't even heard of Bun and are still on Node.

Re: Claude Code uses Bun written in Rust now

#306

Post by throwatdem12311 »

I despise this era we live in. Pushing rewrites like this upon millions of users, when the Bun rewrite has countless known issues and is likely a security nightmare. Every time I ‘brew outdated’ and I see a wall of updates I die a little inside knowing that most of this code has not been verified or even looked at. Yet we hear about massive supply chain attacks pretty much every week now and we’re still full steam ahead on this vibe coded nightmare. God help us. Claude Code in particular updates sometimes multiple times per day. Like I’m sorry but there is no way all this nonsense is safe.

Re: Claude Code uses Bun written in Rust now

#307

Post by [deleted] »

rjzzleep wrote: post #120
jasode wrote: post #83

Earlier quoted context omitted.

>Literally who cares what language a JS toolset is written in? Maybe you're being coy by asking a rhetorical question you already know the answer to but I'll answer as if you asked sincerely... There are 2 different groups interacting with software products: (1) end-users : this is where the "Who cares what language it's written in?!?" is usually applicable. E.g. The finance guys using MS Excel don't care whether it'…

What about Group x. You just AI generated 1 millions lines of code claiming it's for safety. Who exactly is to make any kind of security guarantees about this?

[deleted]

Re: Claude Code uses Bun written in Rust now

#308

Post by nozzlegear »

jubilanti wrote: post #258
bwfan123 wrote: post #255

Earlier quoted context omitted.

So, you have a vibe-coded TUI which happens to work, and then, as a workaround you vibe-translate its engine to make it more performant. Where does that leave you ? Basically, fully dependent on AI to fix whatever breaks. Workaround on a workaround is the way I see it, and it aligns with the AI design mentality in general. For a variety of usecases, this might still be a win in terms of overall cost. But, for softwar…

> for sw that is intended to be built to last, I dont see this working out. the era in which the tech industry built software to last was over long before LLMs, especially VC-backed startups.

The era in which the [VC-backed, SV area] tech industry built software to last was over long before LLMs.

Re: Claude Code uses Bun written in Rust now

#309

Post by qudat »

hellohello2 wrote: post #283
weakfish wrote: post #212

Maybe I’m taking crazy pills, but I’m still stuck on “why the hell does a TUI need to run in terminal React by way of JavaScript” The fact that Anthropic felt the need to buy a runtime so they could make their TUI better speaks more to the quality of engineering than anything else IMO. If rewrites are so easy, why not rewrite CC in a native language? Would’ve been a hell of a lot cheaper.

I'm confused as well, could someone who knows how TUIs work explain what's the point of React-style diffing in this context? I thought you need to clean and full redraw if anything changs anyways?

You can do damage tracking for TUIs. Printing to the terminal is done by moving the cursor and redrawing the line the cursor is on.

Re: Claude Code uses Bun written in Rust now

#310

Post by nozzlegear »

fny wrote: post #290
weakfish wrote: post #212

Maybe I’m taking crazy pills, but I’m still stuck on “why the hell does a TUI need to run in terminal React by way of JavaScript” The fact that Anthropic felt the need to buy a runtime so they could make their TUI better speaks more to the quality of engineering than anything else IMO. If rewrites are so easy, why not rewrite CC in a native language? Would’ve been a hell of a lot cheaper.

JavaScript is dynamic and supports live reload which means iterations are far faster than would be in a compiled language--even for LLMs. This is especially useful when you're trying to evaluate behaviors while changing state surgically.

There's no surgery when you're a company with a trillion dollar hammer and every problem looks like a big ass nail.
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