Claude Code is now open source.. by accident

Anthropic accidentally exposed Claude Code's source maps during a routine update, making the TypeScript/Bun-based codebase temporarily readable. Key findings from the leaked code include: anti-distillation systems targeting competitors, silent profanity logging, unreleased features, and evidence of borrowed scroll behavior from the open-source OpenCode project. A Python port of the leaked code was created using OpenAI's Codex, raising unresolved legal questions about whether AI-generated code can be copyrighted and whether Anthropic can DMCA the port. The incident also highlights the tension between the Claude Code team's 'move fast with AI agents' philosophy and traditional code review practices.