On March 31, 2026, Anthropic accidentally shipped a .map sourcemap file inside a Claude Code npm update. In minutes, this was found and was going viral. The 600k lines of code were mirrored, analyzed, ported to Python and other languages, and uploaded to decentralized servers.

Claude Code is known to be notoriously closed down. Their Agent SDKs provide almost no insight into the internals of Claude Code, and Anthropic themselves do their best to keep the source as closed as possible.

… The legal question nobody has an answer to yet: does a codegen clean-room rebuild violate copyright? — Read More