Claude Code Source Leaked: 12-Layer Harness Architecture Breakdown
What Happened On the night of March 31, 2026, the complete internal source code of Claude Code v2.1.88 was leaked to GitHub. This wasn’t a routine open-source release. While Claude Code is publicly distributed, the published package ships a single bundled file. The internal TypeScript source was never meant to be public. What leaked was the complete internal source — 40+ tool definitions, multi-agent coordination, memory systems, permission controls, and more. ...