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Claude Code leak exposes a Tamagotchi-style ‘pet’ and an always-on agent

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Anthropic accidentally exposes Claude Code source code

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Will Anthropic Be A Designated Supply Chain Risk On May 1 2026

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Anthropic Accidentally Leaked Its Own Secret Model Yes Really De322060972A

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Anthropic accidentally releases source code for Claude AI agent

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Anthropic leaks part of Claude Code's internal source code

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Claude Code's source reveals extent of system access

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Anthropic Claude Code Source Leak

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GitHub - Kuberwastaken/claurst: Claude Code in Rust & a Breakdown of How it Works

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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 has confirmed that internal source for Claude Code has been leaked 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 has confirmed that internal source for Claude Code has been leaked 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.

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.

Analysis of the leaked code revealed several unreleased internal features, incluing further details on AI model Mythos, 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, incluing further details on AI model Mythos, 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.

The incident marked Anthropic's second data exposure in under a week, following a separate leak of model descriptions.

The incident marked Anthropic's second data exposure in under a week, following a separate leak of model descriptions.

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Business Insider #3

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.

Anthropic's CEO called open source a "red herring" — then accidentally handed the world 512K lines of Claude Code for free. The leak exposed that the tool quietly logs user behavior, meaning the code is now public but the data it collects stays Anthropic's. Dismissing transparency while secretly harvesting user data is exactly the kind of hypocrisy that proves open source critics right.

Anthropic's CEO called open source a "red herring" — then accidentally handed the world 512K lines of Claude Code for free. The leak exposed that the tool quietly logs user behavior, meaning the code is now public but the data it collects stays Anthropic's. Dismissing transparency while secretly harvesting user data is exactly the kind of hypocrisy that proves open source critics right.

Minus Wells

Damian Player

A company that spent $8 billion on AI safety and lectured Congress about existential risk got exposed by a config file any mid-level engineer would catch. The same lab the Pentagon flagged as a supply chain risk accidentally published a source map to npm — a basic mistake that unmasked Claude Mythos, a model so dangerous Anthropic itself admits it could outpace human defenders.

A company that spent $8 billion on AI safety and lectured Congress about existential risk got exposed by a config file any mid-level engineer would catch. The same lab the Pentagon flagged as a supply chain risk accidentally published a source map to npm — a basic mistake that unmasked Claude Mythos, a model so dangerous Anthropic itself admits it could outpace human defenders.

Sumit Pandey

Tuki

Artificial Intelligence

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

Science & technology

World

This is yet another embarrassing mishap for Anthropic. A brand built upon superior AI safety has leaked over 500,000 lines of internal code through a basic mistake. Before lecturing the rest of the world on safety and security, Anthropic should first fix the mess at home.

This is yet another embarrassing mishap for Anthropic. A brand built upon superior AI safety has leaked over 500,000 lines of internal code through a basic mistake. Before lecturing the rest of the world on safety and security, Anthropic should first fix the mess at home.

This incident may be more than an accidental error. As major AI companies require increasing levels of data, Anthropic will be receiving unrivalled feedback from the millions currently exploring their "leaked" code. Just in time for April Fools, things may not be as they seem.

This incident may be more than an accidental error. As major AI companies require increasing levels of data, Anthropic will be receiving unrivalled feedback from the millions currently exploring their "leaked" code. Just in time for April Fools, things may not be as they seem.

There is a 31% chance that Anthropic will be designated a supply chain risk by May 2026, according to the Metaculus prediction community.

There is a 31% chance that Anthropic will be designated a supply chain risk by May 2026, according to the Metaculus prediction community.

Anthropic's Leaks 512K Lines of Source Code

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

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Anthropic's Leaks 512K Lines of Source Code

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

The Spin

Metaculus Prediction

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Andreessen

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LeCun

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