“The Claude Code Source Leak” by Error

(mods: I assume this is blowing up twitter and so discussing it here won't do additional damage -- and there are already a thousand github forks -- but I am not actually on twitter, which is why I’m opening discussion here. It's possible I'm missing something. Feel free to nuke this if so.)

For those that hadn't heard yet, last night Anthropic appears to have accidentally published a Claude Code update with extractable source code in it. This seems important, but I'm not sure how much so, and I didn't see an existing discussion here.

My understanding -- and hopefully someone will correct me if I'm wrong -- is that the actually dangerous part of Claude is the weights, and those were not leaked. So the leak may be embarrassing, it may cost Anthropic some competitive advantage, but it's not dangerous.

It's also my understanding that Anthropic has historically been relatively leak-free, until a certain memo leaked a few weeks ago during the DoW incident. Supposedly twice is still coincidence, not enemy action, but it does feel like a questionable coincidence and I wonder if the same person is responsible for both leaks. I don’t know [...]

---

First published:
March 31st, 2026

Source:
https://www.lesswrong.com/posts/YcACRSjpGrqJ4hAyD/the-claude-code-source-leak-1

---

Narrated by TYPE III AUDIO.