Sorry, dudes, it was "publicly available".

Futurism: Anthropic Suddenly Cares Intensely About Intellectual Property After Realizing With Horror That It Accidentally Leaked Claude's Source Code
https://futurism.com/artificial-intelligence/anthropic-suddenly-cares-about-intellectual-property-claude-leak

Anthropic Suddenly Cares Intensely About Intellectual Property After Realizing With Horror That It Accidentally Leaked Claude’s Source Code

Copyright is suddenly very important to Anthropic now that its AI source code leaked. Just don't ask how it trained its AI in the first place.

Futurism
@tankgrrl Live by the sword, die by the sword, you fucking scum.😂

@tankgrrl Does Anthropic even have copyright on their code? As their chief product officer said, almost 100% of Claude Code was generated by Claude, and there is precedence that generative AI output cannot be copyrighted.

https://indianexpress.com/article/technology/artificial-intelligence/anthropic-100-percent-code-ai-generated-claude-10522033/

https://www.reuters.com/legal/government/us-supreme-court-declines-hear-dispute-over-copyrights-ai-generated-material-2026-03-02/