yywing/claude-code

This repo is an educational archive of the source code behind Claude Code, which is Anthropic's command-line tool for letting the Claude AI help with software engineering tasks like editing files, running commands, and searching codebases. The source code was accidentally made publicly downloadable through a packaging mistake in Anthropic's official software distribution. A university student studying software security and supply-chain failures preserved this snapshot to research how modern AI developer tools are built. At its core, Claude Code is a terminal application that lets an AI agent interact with your computer. It can read and write files, execute shell commands, search the web, and spawn sub-agents to tackle tasks in parallel. The codebase reveals a system built with around 1,900 files and over 500,000 lines of code, using TypeScript and a tool called React Ink to render interactive interfaces directly in the terminal. It also includes integrations with code editors like VS Code and JetBrains, allowing the AI to bridge its terminal operations directly into your development environment. This archive would primarily interest security researchers, software architects, and developers building their own AI tools. For example, someone designing an AI coding assistant could study this code to understand how to structure a permission system that safely asks users for approval before the AI runs a command. The code also shows practical approaches to challenges like managing conversation memory, compressing context to save on token costs, and orchestrating multiple AI agents to work together as a team. The project is notable for its honest framing around the ethics of preserving leaked code. The maintainer explicitly states they do not own the original code and includes a companion essay discussing the tension between what is legally permissible and what is genuinely legitimate when studying exposed source material. The repository exists strictly for analysis and education, not as a tool you would download and actively use for your own daily work.