Claude Code Source Code Leaked, Over 500,000 Lines of Code Obtained by Developers

marsbitPublished on 2026-04-01Last updated on 2026-04-01

Abstract

Anthropic faces a major security incident as the complete source code for its AI tool Claude Code, exceeding 500,000 lines of TypeScript, was leaked. The breach originated when a developer shared a compressed file on Twitter, which quickly gained over 5.3 million views. The exposure was due to Anthropic accidentally including .map files when publishing to npm, revealing core code. The leaked code unveils several advanced features, including a project codenamed BUDDY, which offers a personalized cyber pet system with traits like debugging power and even a "sarcasm value." Another feature, KAIROS, aims to create an "always-on" AI assistant capable of maintaining memory across sessions and initiating tasks. The code also includes a "Nightly Dreaming" mechanism, allowing Claude to organize information and consolidate core content while the user sleeps. Despite the breach, the incident has inadvertently showcased Anthropic's innovative capabilities, turning a PR crisis into an unexpected demonstration of their cutting-edge AI developments.

Recently, artificial intelligence company Anthropic encountered an unprecedented crisis when the complete source code of its latest tool, Claude Code, was accidentally leaked within the developer community. The incident began when a developer, Chaofan Shou, posted a compressed package containing over 500,000 lines of TypeScript code on Twitter, sparking widespread attention and discussion among developers globally. This leak quickly exploded online, with page views surpassing 5.3 million within hours, becoming a hot topic in the tech circle.

So, what was the cause of this leak? According to reports, when Anthropic published the code to npm, it actually forgot to remove the .map files, leading to the exposure of the core code. This mistake not only embarrassed the company but also raised external doubts about its security management. However, this accidental leak has given the outside world an early glimpse into some of Anthropic's cutting-edge functionalities in the AI field.

From the source code, it can be seen that Claude Code includes several astonishing features, with the project codenamed BUDDY being particularly notable. It can not only accompany developers in writing code but also has a unique personalized pet system, allowing users to incubate their own cyber pets based on personal information. This pet not only has a cute appearance but also has dynamic stats like debugging power and patience, and even a "sarcasm value," undoubtedly adding a lot of fun to the work atmosphere.

Even more forward-looking is the feature codenamed KAIROS, which aims to achieve an "always-on" AI assistant. Unlike traditional conversation methods, KAIROS can maintain memory across multiple sessions and proactively initiate tasks. Additionally, the source code includes a Nightly Dreaming mechanism, where Claude organizes information and consolidates core content while the user sleeps. This innovative concept not only makes the AI smarter but also brings new possibilities for future work methods.

Although Anthropic is currently busy dealing with this leak, the unexpected exposure might also provide a platform to showcase their cutting-edge technology. This accidental PR crisis has instead highlighted the company's innovative capabilities. The future of the AI field will become even more exciting because of such attempts.

Related Questions

QWhat was the cause of the Claude Code source code leak at Anthropic?

AAnthropic forgot to remove .map files when publishing the code to npm, which exposed the core source code.

QHow many lines of TypeScript code were leaked in the Claude Code incident?

AOver five hundred thousand lines of TypeScript code were leaked.

QWhat is the name of the project that features a personalized cyber pet system for developers?

AThe project is called BUDDY, which includes a personalized cyber pet system with traits like debugging power and patience.

QWhat is the KAIROS feature designed to do according to the leaked source code?

AKAIROS is designed to be an 'always-on' AI assistant that maintains memory across multiple sessions and can proactively initiate tasks.

QWhat mechanism does Claude have for processing information during user inactivity?

AClaude has a 'Nightly Dreaming' mechanism where it organizes information and consolidates core content while the user is sleeping.

Related Reads

Thanks to Dice Rolls, Bitcoin Keys Are Stored Offline, But Not Everyone Will Do It

The article discusses using dice rolls to generate secure Bitcoin wallet seeds, providing entropy independent of potentially flawed hardware random number generators. It explains that each fair dice roll offers about 2.585 bits of entropy, with around 50 rolls needed for a standard 12-word seed phrase and 99+ recommended for higher security. This method gained attention after a vulnerability was revealed in some Coldcard hardware wallets, where a faulty firmware RNG (dating back to 2021) compromised generated keys. The analysis notes that while a dice-generated main seed was safe from this specific flaw, other Coldcard functions (like creating paper wallets, backup keys, or passwords) could still be vulnerable if they used the defective RNG. The piece argues that while dice-based entropy is technically robust, the manual process is error-prone, tedious, and unrealistic for most new users, who might make mistakes in recording or inputting rolls. It concludes that while manual entropy generation should remain an option for advanced users, the long-term goal is to develop reliable, user-friendly hardware and software that securely generates randomness without requiring specialized knowledge. Coldcard users are advised to check their firmware version and replace any secondary secrets (like paper wallet keys) created with vulnerable devices, while also considering multi-signature setups with devices from different manufacturers for added security.

cryptonews.ru27m ago

Thanks to Dice Rolls, Bitcoin Keys Are Stored Offline, But Not Everyone Will Do It

cryptonews.ru27m ago

Michael Saylor Says It Has Become Impossible to Adopt the Bitcoin Update He Opposed!

Michael Saylor stated that it has become mathematically impossible for BIP-110 to achieve the 55% voluntary support threshold within the current Bitcoin mining difficulty adjustment cycle. Based on his analysis of 946 blocks generated up to block 960,561, only 24 blocks contained version field signals supporting BIP-110. Saylor claims all these signals came from DATUM miners sharing rewards via the OCEAN mining pool, with no supporting signals from non-OCEAN miners. He argues this situation prevents BIP-110 from reaching the required consensus level and that the current signals do not represent broad miner agreement. BIP-110 is a proposal aimed at making it more difficult to embed large data like images or text into the Bitcoin network, beyond simple monetary transactions. Its proponents argue Bitcoin should be used primarily for sending money to avoid network congestion. Saylor opposes this, believing the Bitcoin network should not dictate which transactions are necessary and that rules shouldn't change based on the preferences of a few. He also suggests that high support metrics may be inflated by automated signaling software rather than reflecting genuine miner consensus.

cryptonews.ru1h ago

Michael Saylor Says It Has Become Impossible to Adopt the Bitcoin Update He Opposed!

cryptonews.ru1h ago

Number of Negative Bitcoin Comments Hits Record High: What Does This Mean?

Cryptocurrency analytics firm Santiment reported that negative sentiment toward Bitcoin on social media has reached a historically high level. The ratio of positive to negative comments about Bitcoin on platforms like X, Reddit, and Telegram has fallen to its lowest point since the firm began using its modern social monitoring system. A key driver of this sentiment is a vulnerability discovered in the firmware of Coldcard hardware wallets, shaking investor confidence in personal storage and cold wallets—previously considered the safest method for securing crypto assets. Santiment noted that while past crises like the collapses of FTX and Mt. Gox were larger in scale, the Coldcard incident uniquely shifted discussions toward hardware security and cold storage vulnerabilities, rather than centralized exchanges or leveraged trading platforms. Data shows only 0.58 positive comments for every negative one, indicating fear has significantly outweighed greed. Although the data covers just one day, Santiment stated the current panic level exceeds peaks seen earlier this year regarding war concerns and surpasses social media panic recorded during previous major crypto crises.

cryptonews.ru1h ago

Number of Negative Bitcoin Comments Hits Record High: What Does This Mean?

cryptonews.ru1h ago

SUI Stands on the Brink of a New Breakthrough as Bulls Target a Surge to $20

SUI token unlocked approximately 13.72 million tokens on August 1st, valued at around $9.9 million, representing 0.34% of its circulating supply. The release was part of a larger weekly token unlock wave. Sui utilizes a continuous daily vesting model to distribute selling pressure, unlike one-time "cliff" unlocks. Analyst CryptoPatel identifies the recent price range as a high-timeframe accumulation structure, suggesting a buy zone between $0.50 and $0.70 with long-term targets of $5, $10, and $20. However, the token has recently fallen over 5%, underperforming the broader crypto market, and social sentiment has turned slightly bearish near the $0.71-$0.73 support zone. Fundamentally, network activity remains strong. Mubadala Capital launched a $75 million tokenized private markets fund on Sui, and the network has seen the launch of a Bitcoin-collateral testnet and free stablecoin transfers. The price decline appears driven by the token unlock and general market conditions, not by network issues, highlighting a common industry gap between network growth and short-term token price performance.

cryptonews.ru2h ago

SUI Stands on the Brink of a New Breakthrough as Bulls Target a Surge to $20

cryptonews.ru2h ago

BlackRock and Fidelity Lead $265 Million Outflow from Bitcoin ETFs as Ether Price Rises

U.S. spot Bitcoin ETFs saw a net outflow of $265.4 million on July 31st, led by BlackRock's iShares Bitcoin Trust (IBIT) with $122.7 million redeemed, followed by Fidelity's FBTC with $54.8 million. This contrasted sharply with the previous day, July 30th, which recorded a net inflow of $233.1 million, largely driven by IBIT. Meanwhile, spot Ethereum ETFs moved in the opposite direction, attracting a net inflow of approximately $9.03 million, with BlackRock's iShares Ethereum Trust (ETHA) leading. This divergence is part of a broader rotation of institutional interest toward altcoin-linked products, with observers linking the renewed interest in Ether to its role in tokenization and stablecoin settlements. The July 31st outflow continues a longer-term trend, marking the third consecutive quarter of net outflows for U.S. spot Bitcoin ETFs. Overall assets under management remain around $105 billion, but uncertainty surrounding crypto regulation and Bitcoin's price volatility have heightened investor caution. As the largest fund, IBIT's daily flows are expected to set the tone for the broader Bitcoin ETF market.

cryptonews.ru2h ago

BlackRock and Fidelity Lead $265 Million Outflow from Bitcoin ETFs as Ether Price Rises

cryptonews.ru2h ago

Trading

Spot
活动图片