Ray Myers · 2026-07-12 · notable
Ray Myers — Anthropic's Bun-in-Rust story hides the real lesson
Ray Myers argues Anthropic's Bun-in-Rust rewrite is being marketed as proof that AI now replaces engineers, when the real story is that Bun's Zig code was under-disciplined. He points to TigerBeetle as evidence disciplined Zig ships fine.
The Bun rewrite reads as a management story, not a language story.
What is it?
Ray Myers, a longtime software-maintenance advocate, responds to Anthropic's account of using Claude Code to port Bun from Zig to Rust in 11 days. Myers accepts the port happened but disputes the framing that AI now stands in for careful engineering. His counter-example is TigerBeetle, a Zig codebase that ships correctly by leaning on formal methods and a disciplined test culture.
How does it work?
Myers walks through the Bun team's public rationale — memory bugs, contributor shortage, tooling gaps — and argues each item was fixable inside Zig if the team had adopted stricter coding standards, better test coverage, and NASA-style Power-of-Ten rules. He reads Anthropic's narrative as an ad for Claude Code that quietly substitutes 'let the agent rewrite it' for 'invest in engineering rigor'.
Why does it matter?
The Bun-in-Rust post has been repeated as evidence that AI agents can now compress multi-year rewrites into weeks. Myers's critique — currently at 295 points on Hacker News — is the pushback: rewrites succeed when the underlying engineering culture is strong, and citing AI as the reason risks papering over process failures that will bite the next codebase too.
Who is it for?
Engineering leads, language nerds, anyone weighing an AI-driven rewrite.
Try it
https://raymyers.org/post/zed-creator-calls-spade-a-spade/