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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

#51

Post by hibikir »

jeroenhd wrote: post #26
junon wrote: post #5

Earlier quoted context omitted.

Why does changing to Rust kill the project? I don't understand the point here.

My personal feelings about the matter is that having an LLM rewrite the entire thing as an experiment and then just going with it a few weeks later kills any incentive for a community to build up around it. It's a clear signal that every basic aspect of the runtime can change on a whim. I don't care about meh Zig being rewritten to bad Rust if it does the same thing, but taking what is presented as" look at this funn…

It's like a couple of languages I know where there's still one real owner, and there's no real review, and PRs are unlikely to be merged, even with review: They might be open source, but it's more a source visible thing, because you are never going to get a change in, and the language will change directions at the creator's lone whim. The best you can get at times is "I didn't like your PR, so I implemented the feature you tried to add completely different". Typical community killers.

Re: Claude Code uses Bun written in Rust now

#53

Post by simonw »

OJFord wrote: post #30
goo0000fy wrote: post #25

Earlier quoted context omitted.

[flagged]

From the article: > For me this outputs Bun v1.4.0 (macOS arm64). The most recent release of Bun on GitHub is currently v1.3.14 from May 12th, so that v1.4.0 version number in Claude supports them shipping a preview of a not-yet-released Bun version. Which is still true as I write this comment.

The code is on GitHub in the "main" branch, it's only unreleased in that it hasn't been tagged with a version number yet.

Re: Claude Code uses Bun written in Rust now

#54

Post by jdiff »

minraws wrote: post #4
embedding-shape wrote: post #2

> For me this outputs Bun v1.4.0 (macOS arm64). The most recent release of Bun on GitHub is currently v1.3.14 from May 12th, so that v1.4.0 version number in Claude supports them shipping a preview of a not-yet-released Bun version. And so, the FOSS project "Bun" silently dies in darkness and is now something completely else. I'm glad I still had "Investigate if Bun is worth it" on my TODO list and hadn't yet gotten…

It's largely just what jarred is willing to accept this week afaik or not, and they did put the bun 1.4.0 version bump in the changelogs for claude code a while ago, over a month almost. Though most will be forgiven to not reading it since well it's all AI anyways. I don't know how I feel about all this yet, maybe someday.. ooof

> they did put the bun 1.4.0 version bump in the changelogs for claude code a while ago, over a month almost.

Where? Is see no CHANGELOG in the root. I do see LATEST, last modified 2 months ago, and it says 1.3.14

Re: Claude Code uses Bun written in Rust now

#55

Post by baq »

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…

I guess the point is none of it matters, CC users didn't notice or don't care except an exceptionally small minority.

Re: Claude Code uses Bun written in Rust now

#56

Post by kelnos »

afavour wrote: post #16
junon wrote: post #5

Earlier quoted context omitted.

Why does changing to Rust kill the project? I don't understand the point here.

The objection isn’t to the language. It’s to Claude using a version of Bun that is not available to us. We don’t know what’s actually in it.

It may be available to us, in the form of a git checkout of their public repository.

It's true that we don't know exactly which, and whether or not there are any other changes added on, but that is the case for every single release of Claude Code that has used bun.

Re: Claude Code uses Bun written in Rust now

#57

Post by kstenerud »

afavour wrote: post #16
junon wrote: post #5

Earlier quoted context omitted.

Why does changing to Rust kill the project? I don't understand the point here.

The objection isn’t to the language. It’s to Claude using a version of Bun that is not available to us. We don’t know what’s actually in it.

Why is that even a thing to object to? You're talking as if you placed stock in the bizarre idea that Anthropic would close source the project and start charging for it.

Stay your pitchforks.

Re: Claude Code uses Bun written in Rust now

#59

Post by well_ackshually »

atonse wrote: post #18
junon wrote: post #5

Earlier quoted context omitted.

Why does changing to Rust kill the project? I don't understand the point here.

It’s made absolutely no negative difference, as we’ve seen in the real world in the last 60 days since the merge. I feel weird having to defend reality; reality being that it was merged nearly 2 months ago and tons of people have had their pitchforks out without a shred of actual evidence that this made bun worse in any measurable way. But they still insist it was a mistake. I’ve never met Jared or the bun team but I…

[flagged]

Re: Claude Code uses Bun written in Rust now

#60

Post by johnny22 »

cromka wrote: post #44
reddalo wrote: post #29

Damn, I should have not migrated to Bun. Should I revert back to Npm?

I am getting into the frontend dev and one thing that I don't understand is why people use bun in the first place? It's not much better preforming, it's not much safer, it's still not 100% compliant. Some tests show it's actually slower than node. Why bother switching, then?

i assume it's because of all the built in tooling that node doesn't ship with.
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