# How Claude Code's Source Map Was Shipped and Rebuilt by the Community

DevFeed: [How Claude Code's Source Map Was Shipped and Rebuilt by the Community](<https://devfeed.tech/articles/diving-into-claude-code-s-source-code-leak-39083.md>)

Original publisher: [Read original article](<https://read.engineerscodex.com/p/diving-into-claude-codes-source-code>)

Author: Engineer's Codex

Published: 2026-04-01T06:25:24Z

Content type: article

Language: en

Sources: [Engineer's Codex](<https://devfeed.tech/sources/engineer-s-codex.md>)

Topics: [Claude Code](<https://devfeed.tech/topics/claude-code.md>), [anthropic](<https://devfeed.tech/topics/anthropic.md>), [Code generation](<https://devfeed.tech/topics/code-generation.md>), [GitHub](<https://devfeed.tech/topics/github.md>), [Artificial Intelligence](<https://devfeed.tech/topics/ai.md>), [Code review](<https://devfeed.tech/topics/code-review.md>)

Tags: [ai](<https://devfeed.tech/tags/ai.md>), [anthropic](<https://devfeed.tech/tags/anthropic.md>), [claude-code](<https://devfeed.tech/tags/claude-code.md>), [codegen](<https://devfeed.tech/tags/codegen.md>), [github](<https://devfeed.tech/tags/github.md>), [leak](<https://devfeed.tech/tags/leak.md>), [npm](<https://devfeed.tech/tags/npm.md>), [openai](<https://devfeed.tech/tags/openai.md>), [post-mortems](<https://devfeed.tech/tags/post-mortems.md>)

## AI overview

The article examines how Anthropic accidentally included a sourcemap in a Claude Code npm package, how the exposed code was mirrored and ported to other languages, and the resulting copyright questions around AI-assisted clean-room rebuilding.

## Source excerpt

Engineer's Codex is a publication about real-world software engineering.