Entire Claude Code CLI source code leaks thanks to exposed map file

An exposed map file led to the full Claude Code CLI source code being leaked.

Reported component sizes include about 40,000 lines for a plugin-like tool system and 46,000 lines for the query system.

Developers had previously partially reverse-engineered Claude Code, but not to this extent.

The leak exposes architectural details that competitors could use and gives bad actors information to find vulnerabilities.