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Anthropic Leak Reveals Claude Code Internal Source Code

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There's a "wall of fear-mongering and doomerism" in the AI world right now.

"Worrying about AI today is like worrying about overpopulation on Mars."

Concerns that AI could pose a threat to humanity is "preposterously ridiculous."

Claiming AI poses an existential threat is "such an extreme" and risks "wip[ing] out some of its potential benefits."

"I'm more concerned about... the risks that are here and now [than the existential threat of AI]."

Current AI is "not anywhere close" to posing an existential threat but it could in the future.

AI is the "biggest existential threat" to humanity.

AGI's worst-case scenario would be "lights-out for all of us."

Powerful AI systems "taking control" pose an "existential threat."

AI has a "10 to 25 per cent" chance of destroying humanity.

"The most likely result of building a superhumanly smart AI... is that literally everyone on Earth will die."

Does AI Pose an Existential Threat to Humanity?

Anthropic confirmed that its AI coding tool Claude Code leaked internal source code after a release packaging error. "This was a release packaging issue caused by human error, not a security breach," a company spokesperson said, adding that no customer data or credentials were exposed.

Anthropic confirmed that its AI coding tool Claude Code leaked internal source code after a release packaging error. "This was a release packaging issue caused by human error, not a security breach," a company spokesperson said, adding that no customer data or credentials were exposed.

The leak occurred when Claude Code v2.1.88 was published to the npm registry with a source map file, cli.js.map, that contained the full TypeScript source code. The file reportedly mapped 1,900 files and more than 512,000 lines of code.

The leak occurred when Claude Code v2.1.88 was published to the npm registry with a source map file, cli.js.map, that contained the full TypeScript source code. The file reportedly mapped 1,900 files and more than 512,000 lines of code.

A post on X announcing the leak drew tens of millions of views, and copies of the code were mirrored to GitHub repositories, one of which accumulated more than 50,000 forks. Developer Justin Schroeder warned that redistributing the code would violate Anthropic's license.

A post on X announcing the leak drew tens of millions of views, and copies of the code were mirrored to GitHub repositories, one of which accumulated more than 50,000 forks. Developer Justin Schroeder warned that redistributing the code would violate Anthropic's license.

Analysis of the leaked code revealed several unreleased internal features, including KAIROS, a background always-on assistant mode, and a Tamagotchi-style companion system called "Buddy" with 18 species of varying rarity gated behind a compile-time feature flag.

Analysis of the leaked code revealed several unreleased internal features, including KAIROS, a background always-on assistant mode, and a Tamagotchi-style companion system called "Buddy" with 18 species of varying rarity gated behind a compile-time feature flag.

The source code also contained an "Undercover Mode" designed to prevent Anthropic employees from revealing internal information when using Claude Code on public repositories, instructing the AI not to include internal codenames or disclose that it is an AI in commit messages or pull requests.

The source code also contained an "Undercover Mode" designed to prevent Anthropic employees from revealing internal information when using Claude Code on public repositories, instructing the AI not to include internal codenames or disclose that it is an AI in commit messages or pull requests.

Gartner AI analyst Arun Chandrasekaran said the leak poses risks such as giving bad actors "possible outlets to bypass guardrails" but suggested its long-term impact may be limited. The incident marked Anthropic's second data exposure in under a week, following a separate leak of model descriptions.

Gartner AI analyst Arun Chandrasekaran said the leak poses risks such as giving bad actors "possible outlets to bypass guardrails" but suggested its long-term impact may be limited. The incident marked Anthropic's second data exposure in under a week, following a separate leak of model descriptions.

Anthropic's Claude Code Leaks 512K Lines of Source Code

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