Anthropic Rewrote Millions of Lines of Code With AI. That Should Terrify You.
Anthropic used Claude Code to execute large-scale code migrations, including a Zig-to-Rust rewrite. It’s a genuine engineering breakthrough β and a marketing masterclass. But the real danger isn’t whether AI can rewrite your codebase. It’s whether your organization can survive a rewrite executed at machine speed with human-speed governance. The tool that wrote your code is now rewriting it, and that should make every engineer who’s lived through a botched migration very, very nervous.