AI
Claude Code ships with unreleased Rust-rewritten version of Bun bundled inside
Simon Willison flagged an unusual discovery inside the Claude Code CLI: the binary quietly ships with an unreleased version of Bun that has been rewritten in Rust, meaning users who installed Claude Code are already running pre-release Bun software without knowing it. Willison shared terminal commands that let users inspect the bundled runtime and confirm its version, and followed up with a blog post walking through the finding in more detail.
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