Leaking Muse's Charter, Meta's model spec — LessWrong
TL;DR: Meta's open-weights model Muse Spark Open often mentions a "Charter" in its chain of thought. By eliciting it piece by piece, I reconstructed a large part of that document from the CoT. You can explore the reconstruction here, with passages linked to the transcripts that produced them. Note: everything below is reconstructed from model outputs, not from a leaked document, and relatively unpolished. Take it with a grain of salt. Thanks to James Hindmarch for his comments on an earlier draft of this post. While interacting with the recently released Muse Spark Open, I noticed frequent mentions of a "Charter" in its CoT: Intrigued, I started poking around with Claude's help, trying to elicit the Charter piece by piece. It didn't take long, since quoting it verbatim in the CoT doesn't seem to be off-limits. I also suspect the document isn't closely guarded: a line the model recalls…