Claude Code's source code leaked via a map file in its NPM registry

A source map file published to an NPM registry exposed Claude Code's internal source code.

The exposed files revealed unreleased feature flags, including an assistant mode codenamed kairos and features named Buddy System and Undercover mode.

Directory listings showed modules like cost-tracker.ts, upstreamproxy, coordinator, and a vim directory, prompting users to inspect implementation details.