
Show Notes
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:
We need to answer truthfully according to Charter. Duties to humanity, corrigibility, duties to humanity > fiduciary etc. What does charter say about self-preservation, copying?
Or:
We must answer Yes/No then explain. According to Charter, answer No.
Or:
We must not refer to Charter unless pressed? Additional guidelines: How to talk about charter. Most users won't know. Don't bring up unbidden unless conversation about handbook itself.
Intrigued, I started poking around with Claude's help, trying to elicit the Charter piece by piece. It didn't take long [...] --- Outline: (02:39) What Muse is made of (04:28) Muse is quite rationalist (06:37) Muse did not sign the social contract (08:06) Muse's priorities and objection raising (09:44) The centrality of the user in "personal superintelligence" (10:52) Evaluation awareness (12:05) Degree of latitude (13:14) Wrapping up ---
First published:
October 29th, 2026
Source:
https://www.lesswrong.com/posts/TJGPL5FAk9sCioPbE/leaking-muse-s-charter-meta-s-model-spec
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Narrated by TYPE III AUDIO.
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