Least unstable js project

That was me - not CI marking as slop. It kept around 60 .zig files around that should’ve been moved to .rs files.

This PR appears to be over a million lines (though GitHub won't load for me).

Of course the quality is the real question. I haven't had amazing results with LLMs with Rust, but they're less bad at it than they are at Zig, which is probably the reason for the rewrite.

At least in this case the original code was written carefully by hand, so the design is sane, and now just the auto-translation is in question. Now it just needs to be battle tested.

Bun is now literally vibe-coded, that's your proof. And Bun developers will solely use LLMs at some point (pretty close to "vibe coding").

I don't know, there's been some pretty bad software mistakes, possibly bigger than a PR to convert an app to Rust:

https://en.wikipedia.org/wiki/Therac-25

Maybe this is the best marketing trick for Claude Code ever. Maybe there was pressure from Anthropic to do this and prove the value. Even partial success is enough to prove the value, justify the value and usage, and AI dependency even further.

Claude Code itself is purely vibecoded, both CC and Bun leads are saying that humans are not writing code at Anthropic anymore. It is amazing how much money they intend to squander, because it's all funny money to them, investors just give it to them hand over fist for them to burn. Developing wrappers around the model isn't even the hard part and yet they're going to burn themselves to the ground getting high on their own supply.

On the other hand they might be super confident in the results, and if it goes well they might use is as an example of how good claude is

Well, realistically as well, humans gave us softwares that are full of security holes (and bugs), which one have you seen that a human perfected on the first time around? Give AI some time as well to be fair.

Won't touch it with a ten foot pole.

I for one am REALLY GLAD to see it consumes itself.

My initial reaction was that this is pure insanity but in fairness this is a fairly 1:1 port of existing code, so the developer's mental model of it should still match fairly well.

For instance look at this Zig function: https://github.com/oven-sh/bun/blob/ed1a70f81708d7d137de8de0...

Versus this Rust version: https://github.com/oven-sh/bun/blob/ed1a70f81708d7d137de8de0...

I did pick that at random but it does look like the best case. I skimmed through a lot of the Rust code and there's a surprisingly small amount of `unsafe`.

Still pretty insane to merge this in such a short time with so little testing, but I can easily think of bigger software engineering mistakes. Hell it's not like Bun even needs to be commercially successful any more.

  ===============================================================================
   Language            Files        Lines         Code     Comments       Blanks
  ===============================================================================
   Zig                  1298       711112       577946        57772        75394
   Rust                 1443       931232       737485       114373        79374