What is claude-code-sourcemap?

This is an unofficial, community-assembled reconstruction of the source code for Claude Code, Anthropic's command-line coding assistant. The original tool ships as a compiled, bundled JavaScript file through the npm package registry. Because that package included source maps (files that link compiled code back to the original TypeScript files), someone was able to reverse the process and recover what appears to be the underlying TypeScript source code. The recovered version corresponds to release 2.1.88 of the CLI. The repository contains 4,756 restored files, including 1,884 TypeScript and TSX source files. The directory structure reveals how the tool is organized: a main entry point for the command-line interface, more than 30 tool implementations (Bash execution, file editing, search), over 40 command handlers (commit, review, configuration), services for connecting to the Anthropic API and the Model Context Protocol, utility functions for git operations and authentication, multi-agent coordination, a plugin system, a skill system, voice interaction, and a Vim editing mode. The project page explicitly states that this is not the official Anthropic development repository, that the source code belongs to Anthropic, and that the repository exists for technical research and learning only. Commercial use is not permitted. The README notes that if there are any intellectual property concerns, the repository can be taken down on request. This kind of source map extraction is a known technique in the software world. Compiled JavaScript bundles often ship with source maps to help developers debug errors in production. Those maps can be used in reverse to reconstruct the original code structure, though the result may not perfectly match the internal development version.