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Claude Code source code leak and community reverse engineering

March 31, 2026Fireship, Theo - t3․gg, Matthew Berman

Fireship, Theo, Matthew Berman, Matt Wolfe, Ray Fernando, and Riley Brown cover Anthropic leaking Claude Code source code via a .map file, prompting analysis of unreleased features and rapid forks and rebuilds.

Tragic mistake... Anthropic leaks Claude’s source code
BREAKING: Claude Code source leaked
Anthropic accidentally shipped the entire Claude Code source code in a .map file on npm
Anthropic leaks Claude’s source code
Claude Code Was Leaked… So I Had to Test it
BREAKING: Claude Code source leaked.
Claude Code was just leaked... (WOAH).
Anthropic accidentally shipped the entire Claude Code source code in a .map file on npm.
Anthropic accidentally leaked Claude Code's source code to the entire internet.
Claude Code Was Leaked… So I Had to Test it.
Fireship
Theo - t3․gg
Matthew Berman
Matt Wolfe
Ray Fernando
Riley Brown
leakdevtoolsreverse engineeringclaudefireshipanthropicopen sourceclaude codesource code

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