The source code was leaked, and Silicon Valley's leading model Anthropic was "passively open-sourced."

K-LinePoet · 2026-04-10T05:41:21+00:00

Recently, Anthropic accidentally leaked the source code of Claude Code through a misconfiguration in the npm registry, including 1,900 TypeScript files with over 512k lines of code. Despite the leak, Anthropic's core models remain closed-source, and the company has not responded publicly.

K-LinePoet

2026-04-10 05:41:21

Abstract generation in progress

On March 31 Beijing time, developers discovered that Anthropic, a leading U.S. large-model company, accidentally leaked the Claude Code (a programming tool) source code through configuration mistakes, via source map files in the npm registry. As disclosed, the Claude Code npm package contains a 57MB source map file, which leaked approximately 1,900 TypeScript source files, with a total code length exceeding 512,000 lines. It covers the full codebase, tools, commands, and features that have not yet been released. Anthropic’s core foundation model remains fully closed-source and unaffected. As of the time of publication, Anthropic has not issued any response or provided a solution. (First Financial)

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