Claude Code is entirely vibe-coded for a long time. Bun isn't. You go read and compare the actual Bun code; it reads reasonably well [1].

[1] For example, as a random sample, https://github.com/oven-sh/bun/blob/bun-v1.3.14/src/css/medi... -> https://github.com/oven-sh/bun/blob/4924862cffbf671792d47c92...

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silver_silver 5 hours ago | parent [-]

Sure, reasonably well at first glance, but to quote the article:

> I rewrote Bun in Rust using about 50 dynamic workflows in Claude Code run continuously over the course of 11 days.

> Excluding comments, Bun is 535,496 lines of Zig.

> How do you review a PR with +1 million lines added? How do you start to build the confidence needed to responsibly merge large quantities of LLM-authored code? A language-independent test suite with a million assertions, adversarial code review and when something does go wrong, fixing the process that generates the code instead of hand-fixing the code.

That’s vibe coding. This blog post is an ad for Claude, nothing more.

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teach 5 hours ago | parent | next [-]

You're entitled to call things as you wish, of course, but your definition of "vibe-coding" differs quite a bit from mine.

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frollogaston 4 hours ago | parent | prev [-]

Doesn't look like vibecoding to me. It does look like a Claude ad, but they do have a vested interest in not screwing up Bun now that they own it.

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27183 4 hours ago | parent [-]

What would be the consequence to them if they did screw it up? Screwing up the maintainability of a project, especially a big one, doesn't necessarily have immediate consequences. The fallout could be delayed by a year or more. Also, they have effectively limitless tokens to burn on keeping everything looking OK, and a vested interest in doing so.

I'm not trying to spin up some kind of conspiracy theory here, but I'm not sure to what extent Anthropic does have any vested interest in this project (in fiscal terms at least) because the reputational fallout could be significantly delayed and might just not be big enough to matter.

	▲	simonw 2 hours ago \| parent [-]
		Claude Code is the main reason their revenue (ARR) grew from $9bn to ~$47bn in the first half of this year. That's a very big reason not to screw this up.