The uncomfortable part of Claude Code’s “2-week” migration story
What jumped out at me wasn’t the speed. It was the confidence that a migration like this can be made to look clean at all. A 100,000-line codebase moved from Bun to Rust in two weeks, with Claude Code doing the heavy lifting. That sounds impressive, sure. But the more interesting detail is how aggressively Anthropic is trying to turn “AI wrote the code” into something much stricter: AI wrote the code, then a judge system, test suites, and migration rules boxed it in until the result was acceptab
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