Nice summary of what is in the Claude Code source leak.

> accidentally shipping your source map to npm is the kind of mistake that sounds impossible until you remember that a significant portion of the codebase was probably written by the AI you are shipping.

https://alex000kim.com/posts/2026-03-31-claude-code-source-leak/

The Claude Code Source Leak: fake tools, frustration regexes, undercover mode, and more

Anthropic accidentally shipped a source map in their npm package, exposing the full Claude Code source. Here's what I found inside.

Alex Kim's blog