{"type":"post","id":"luigi-petrucco-reconstructs-meta-s-muse-spark-open-7743a3","slug":"luigi-petrucco-reconstructs-meta-s-muse-spark-open-7743a3","title":"Luigi Petrucco reconstructs Meta’s Muse Spark Open Charter from chain-of-thought","description":"Luigi Petrucco says he reconstructed substantial portions of Meta’s unpublished Muse Spark Charter by eliciting and comparing passages from the model’s chain of thought.","retrieval_nugget":"Luigi Petrucco says he reconstructed substantial portions of Meta’s unpublished Muse Spark Charter by eliciting and comparing passages from the model’s chain of thought.","published_at":"2026-11-10","updated_at":"2026-11-10","record_date":"2026-11-10","date_kind":"published_at","topics":["claude"],"entities":["Meta","Muse Spark Open","Luigi Petrucco","OpenRouter","Claude"],"related_patterns":[],"novelty_label":"new_fact","what_changed":"Luigi Petrucco says he reconstructed much of Muse Spark Open’s Charter from 884 transcripts generated with 260 prompts, emphasizing the result is inferred from model outputs, not a leaked document.","prior_refs":[],"source_url":"https://vigji.github.io/blog/muse-spark-charter","source_urls":["https://vigji.github.io/blog/muse-spark-charter"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:luigi-petrucco-reconstructs-meta-s-muse-spark-open-7743a3","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/luigi-petrucco-reconstructs-meta-s-muse-spark-open-7743a3/","markdown":"https://newruntime.com/posts/luigi-petrucco-reconstructs-meta-s-muse-spark-open-7743a3.md","json":"https://newruntime.com/posts/luigi-petrucco-reconstructs-meta-s-muse-spark-open-7743a3.json"},"markdown_url":"https://newruntime.com/posts/luigi-petrucco-reconstructs-meta-s-muse-spark-open-7743a3.md","next_reads":[{"type":"topic","path":"/topics/claude/","url":"https://newruntime.com/topics/claude/","title":"Claude","reason":"Explore the claude topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/claude.md","json_url":"https://newruntime.com/topics/claude.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/sources/","url":"https://newruntime.com/sources/","title":"Sources","reason":"See the original sources this archive cites.","media_type":"text/html"}]}