Anthropic issues DMCA takedown notices to 8100 repositories, v2.1.88 that leaked source code synced from npm is pulled.

According to 1M AI News monitoring, Anthropic issued a DMCA takedown notice to GitHub regarding the Claude Code source code leak. GitHub has expanded the takedown to the entire fork network, resulting in 8,100 repositories being made private, including the parent repository nirholas/claude-code and all its forks. The DMCA notice was signed by Anthropic's intellectual property enforcement representative, stating that "the entire repository constitutes infringement."

Meanwhile, version 2.1.88, which included the source map, has been pulled from npm, with the version number jumping directly from v2.1.87 to v2.1.89. This version had inadvertently included a massive 60MB source map file, allowing full TypeScript source code recovery.

This is not Anthropic's first deployment of the DMCA. When Claude Code was first released in February 2025, it included a source map that led to the community extracting the source code. Subsequently, in April 2025, Anthropic submitted its first DMCA notice to GitHub. The trigger for this leak was the same (inclusion of a source map in the npm package), but the scale of fork propagation far exceeds the previous incident, with the takedown of 8,100 repositories reflecting a significant increase in Claude Code's user base over the past year.