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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

#11

Post by gipp »

Cthulhu_ wrote: post #7
junon wrote: post #5

Earlier quoted context omitted.

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

Yeah same, according to one of the Zig team members, the original source code wasn't all that anyway. But this is HN, a subsection of which places a high importance on what language something is written in, moreso than what it does (feels like).

I don't think the GP had anything to do with the language change itself. More that it marks a clear point of Anthropic taking ownership and governance of the project in a less open direction.

Re: Claude Code uses Bun written in Rust now

#12

Post by petcat »

_pdp_ wrote: post #10
junon wrote: post #5

Earlier quoted context omitted.

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

I am impartial on the matter, but I think one of the reasons Bun became a thing in the first place was because of Zig attracted a small but very active developer community. Switching from Zig to Rust effectively alienates that community.

I think the Zig people are really just worried that maybe Zig itself is a DOA language before it has even reached 1.0 because it doesn't offer enough over C for any serious use and their flagship project has now abandoned it.

Re: Claude Code uses Bun written in Rust now

#13

Post by embedding-shape »

junon wrote: post #5
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…

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

I don't care about the language, but pre-releases the community don't get access to but released (Anthropic) applications do have access to, feels a bit too on the nose after the acquisition.

Re: Claude Code uses Bun written in Rust now

#14

Post by gabrieledarrigo »

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 month.

The communication is the issue, and it was handled very badly, in a way that impacted trust and divisions.

Was it so difficult to adopt the approach that the TS team adopted for 7.0?

Re: Claude Code uses Bun written in Rust now

#16

Post by afavour »

junon wrote: post #5
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…

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.

Re: Claude Code uses Bun written in Rust now

#17

Post by foxes »

junon wrote: post #5
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…

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

As an open source - community driven project? Have you looked at the repo on github?

Theres thousands of PRs from claude agents or whatever.

Yeah really feels like a worthwhile place to contribute lol.

Re: Claude Code uses Bun written in Rust now

#18

Post by atonse »

junon wrote: post #5
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…

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 don’t understand all the personal attacks, I just feel the need to correct the facts. Literally who cares what language a JS toolset is written in?

It’s not like they ported JavaScriptCore (the actual JS runtime) to rust even. All that stuff is largely untouched.

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