Claude Code Leaks

Note: The original unmodified leaked source is preserved in the backup branch.

Claude Code - Leaked Source (2026-03-31)

On March 31, 2026, the full source code of Anthropic's Claude Code CLI was leaked via a `.map` file exposed in their npm registry.

How It Leaked

Chaofan Shou (@Fried_rice) discovered the leak and posted it publicly:

"Claude code source code has been leaked via a map file in their npm registry!"

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The source map file in the published npm package contained a reference to the full, unobfuscated TypeScript source, which was downloadable as a zip archive from Anthropic's R2 storage bucket.

Overview

Claude Code is Anthropic's official CLI tool that lets you interact with Claude directly from the terminal to perform software engineering tasks - editing files, running commands, searching codebases, managing git workflows, and more.

This repository contains the leaked `src/` directory.

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Directory Structure

src/
|- main.tsx                 # Entrypoint (Commander.js-based CLI parser)
|- commands.ts              # Command registry
|- tools.ts                 # Tool registry
|- Tool.ts                  # Tool type definitions
|- QueryEngine.ts           # LLM query engine (core Anthropic API caller)
|- context.ts               # System/user context collection
|- cost-tracker.ts          # Token cost tracking
|
|- commands/                # Slash command implementations (~50)
|- tools/                   # Agent tool implementations (~40)
|- components/              # Ink UI components (~140)
|- hooks/                   # React hooks
|- services/                # External service integrations
|- screens/                 # Full-screen UIs (Doctor, REPL, Resume)
|- types/                   # TypeScript type definitions
|- utils/                   # Utility functions
|
|- bridge/                  # IDE integration bridge (VS Code, JetBrains)
|- coordinator/             # Multi-agent coordinator
|- plugins/                 # Plugin system
|- skills/                  # Skill system
|- keybindings/             # Keybinding configuration
|- vim/                     # Vim mode
|- voice/                   # Voice input
|- remote/                  # Remote sessions
|- server/                  # Server mode
|- memdir/                  # Memory directory (persistent memory)
|- tasks/                   # Task management
|- state/                   # State management
|- migrations/              # Config migrations
|- schemas/                 # Config schemas (Zod)
|- entrypoints/             # Initialization logic
|- ink/                     # Ink renderer wrapper
|- buddy/                   # Companion sprite (Easter egg)
|- native-ts/               # Native TypeScript utils
|- outputStyles/            # Output styling
|- query/