Anthropic spends a month

Anthropic has built its public identity around the winning idea that it is a precision AI company. It publishes detailed research on the risks of AI, employs some of the best researchers in the field, and has been vocal about the responsibilities that come with building such powerful technology — so loudly, of course, that it now competes with the Department of Defense. On Tuesday, unfortunately, someone forgot to check the box.

It is worth noting that this is the second time within a week. Last Thursday, Fortune reported that Anthropic had mistakenly made nearly 3,000 internal files publicly available, including a draft blog post describing a powerful new model the company had not yet announced.

Here’s what happened Tuesday: When Anthropic rolled out version 2.1.88 of its Claude Code software package, it mistakenly included a file that exposed nearly 2,000 source code files and more than 512,000 lines of code — essentially the entire architectural blueprint for one of its most important products. A security researcher named Chaofan Shou noticed it almost immediately and posted it on (Internally, we thought things were less measured.)

CloudCode is not a by-product. It’s a command-line tool that lets developers use Anthropic’s AI to write and edit code, and it’s become massive enough to worry competitors. According to the Wall Street Journal, OpenAI has discontinued its video generation product Sora just six months after its public launch to refocus its efforts on developers and enterprises — partly in response to CloudCode’s growing momentum.

What was leaked was not the AI ​​model itself, but the software that surrounds it, that is, the instructions that tell the model how to behave, what tools to use, and where its limits are. Developers began posting detailed analyzes almost immediately, with one describing the product as “a production-level developer experience, not just a wrapper around an API.”

Whether this matters in any permanent way is a question best left to the developers. Competitors may find the architectural design advantageous; At the same time, the field is moving quickly.

Either way, somewhere at Anthropic, you can imagine that some extremely talented engineer spent the rest of the day quietly wondering if he still had a job. One can only hope it’s not the same engineer or engineering team that showed up late last week.