Anthropic confirmed a major source code leak of its Claude Code CLI tool on April 1, 2026, caused by an npm packaging error. Approximately 512,000 lines of TypeScript, including unreleased features like KAIROS and BUDDY, were exposed. The leak was discovered by security researcher Chaofan Shou.

Anthropic inadvertently exposed the complete TypeScript source code of its Claude Code CLI (approx. 512K lines) through an npm package source map error, revealing unreleased features like KAIROS and BUDDY. The company confirmed no user data breach, but it’s the second such incident in 13 months, raising security concerns.

Anthropic accidentally published the full source code of its Claude Code CLI tool via an npm package, exposing 512,000 lines of TypeScript including unreleased features like KAIROS and BUDDY. A blockchain security researcher first discovered the leak, sparking debate over AI tool supply chain security.

Anthropic accidentally shipped 512,000 lines of TypeScript source code of Claude Code CLI via npm, revealing hidden features like KAIROS, BUDDY, and agent swarms. This is the second such leak in 13 months, sparking concerns over release hygiene.

Anthropic confirmed that a packaging mistake exposed roughly 512,000 lines of Claude Code CLI source code through a public npm release, revealing internal architecture and unreleased features but no user data or model weights.

Anthropic confirmed that a packaging mistake exposed roughly 512,000 lines of Claude Code CLI source via a public npm release. The company said no user data, credentials, or model weights were compromised.

The crypto market dropped to $1.91 trillion after a volatile week, with bitcoin and ether both declining sharply. Around 34 tokens posted double-digit losses, led by SUN, while HNT stood out as the top gainer.

The crypto market slipped to $1.91 trillion after a volatile week, with bitcoin and ether both down nearly 8%. SUN, PEOPLE, and ZRO led the losers, while HNT, BDX, and STRK posted notable gains.