Moving 535,496 Lines to "Another Language" in 11 Days — What Bun's Full Rewrite Reveals About a New Use for Coding Agents, and the Aftertaste It Left
Bun was fully ported from Zig to Rust—530,000 lines in 11 days—by running multiple coding agents in parallel. We lay out the scale and motivation of the case, what it means for development teams, and the criticism that mass generation without review can't be trusted.