I Downloaded the Claude Code Source Before Anthropic DMCA'd It

Someone reverse-engineered Anthropic's proprietary Claude Code CLI from its compiled npm bundle. They used Claude itself to do it. Published April 1st. 3.6k stars. 4.7k forks. In 15 hours. The author left a note in the README: "I don't know how long this project will exist. Fork doesn't work well — git clone is more stable." Translation: DMCA imminent. I cloned it immediately. Spent several hours auditing 3,817 files across 62 source directories. Here's what's actually inside — and why this is different from any source leak you've seen before. This Isn't a Sourcemap Leak — It's Stranger When developers hear "source leak," they assume accidentally shipped .map files alongside minified JS. The standard accidental disclosure. I checked the official @anthropic-ai/claude-code npm package for exactly that — nothing. Anthropic shipped clean. What actually happened here is more interesting: Decompile the 25MB official npm bundle using standard reverse tools Feed the decompiled output into 4 ro