Anthropic, the flagship AI company, has inadvertently exposed the source code for its major CLI tool Claude Code. It has already been extracted with mirrors published on GitHub. Chaofan Shou announced the discovery on X. “Claude Code source code has been leaked via a map file in their npm registry!” the user posted.

Anthropic is racing to contain the fallout after accidentally exposing the underlying instructions it uses to direct Claude Code, the popular artificial-intelligence agent app that has won the company...