Summary
Anthropic's Claude Code CLI source code was fully exposed on March 31, 2026, due to a source map file mistakenly included in the npm package, revealing proprietary architecture, system prompts, internal feature flags for unreleased capabilities, and permission flows. This is the company's second significant leak in five days.
Take Action:
If you develop or publish npm packages, audit your build pipelines now: use npm pack --dry-run before every publish to verify no source maps, debug files, or internal assets are included in your distribution. If you integrate Claude Code into your workflows, monitor Anthropic's official advisories for any extra actions related to this tool.
Read the full article on BeyondMachines
This article was originally published on BeyondMachines
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