{"schema_version":"onlylabs.public_signal.v1","title":"Anthropic Writing: Petri Open Source Auditing","description":"Anthropic writing signal with public source context, captured evidence pages, related signals, and data-business radar classification.","url":"https://onlylabs.fyi/signals/e26bb3d1-6e91-454d-9538-a95f39136b19","json_url":"https://onlylabs.fyi/signals/e26bb3d1-6e91-454d-9538-a95f39136b19/signal.json","generated_at":"2026-06-11T04:15:55.752+00:00","org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab","category_label":"Frontier lab","dossier_url":"https://onlylabs.fyi/labs/anthropic","dossier_json_url":"https://onlylabs.fyi/labs/anthropic/dossier.json"},"related_urls":{"signal":"https://onlylabs.fyi/signals/e26bb3d1-6e91-454d-9538-a95f39136b19","signal_json":"https://onlylabs.fyi/signals/e26bb3d1-6e91-454d-9538-a95f39136b19/signal.json","source":"https://www.anthropic.com/research/petri-open-source-auditing","lab_dossier":"https://onlylabs.fyi/labs/anthropic","lab_dossier_json":"https://onlylabs.fyi/labs/anthropic/dossier.json","analysis":"https://onlylabs.fyi/analysis/anthropic","analysis_json":"https://onlylabs.fyi/analysis/anthropic/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/anthropic/evidence.json","category":"https://onlylabs.fyi/frontier","category_json":"https://onlylabs.fyi/frontier.json","category_feed":"https://onlylabs.fyi/frontier/feed.xml","category_signals_json":"https://onlylabs.fyi/signals.json","topic":"https://onlylabs.fyi/topics/talking","topic_signals_json":"https://onlylabs.fyi/topics/talking/signals.json","topic_feed":"https://onlylabs.fyi/topics/talking/feed.xml","data_business":null},"answer_pack":{"answer":"Anthropic published Petri Open Source Auditing. This talking signal gives public context for research themes, product direction, policy, or launch framing. High-signal details: Petri: An open-source auditing tool to accelerate AI safety research \\ Anthropic Alignment Petri: An open-source auditing tool to accelerate AI safety research Oct 6,.... onlylabs links this event to 1 captured evidence page and 6 related writing signals.","signal_desk":"talking","source_context":{"source_url":"https://www.anthropic.com/research/petri-open-source-auditing","source_host":"anthropic.com","occurred_at":"2025-10-06T17:12:39+00:00","first_seen_at":"2026-06-09T02:17:26.339488+00:00","date_source":"sitemap.lastmod","context":null},"context_markers":[{"label":"Lab","value":"Anthropic","source":"signal"},{"label":"Signal desk","value":"talking","source":"signal"},{"label":"Source host","value":"anthropic.com","source":"source"},{"label":"Watch term","value":"Eval methodology","source":"evidence"},{"label":"Watch term","value":"Safety and alignment","source":"evidence"},{"label":"Watch term","value":"Agents and tool 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public writing and discussion into a readable map of research themes, product framing, policy posture, launch narratives, and market attention.","evidence_focus":["post title","source URL","captured page text","HN traction","linked model or paper references","publication date"],"extraction_questions":["Which themes are labs choosing to explain publicly?","Which posts are attracting outside discussion?","Which writing reframes a recent release, model, hiring wave, or policy stance?","Which posts mention data, evals, infrastructure, safety, or deployment workflows?"],"signal_questions":["What public theme, launch framing, or research direction does this writing signal expose?","Which themes are labs choosing to explain publicly?","Which posts are attracting outside discussion?","Do the 6 related writing signals show a repeated pattern?"],"output_fields":["org","theme","public_framing","traction","data_business_lane","evidence_url"],"data_business_relevance":"Public writing supplies the narrative layer over raw signals and helps identify which frontier-lab priorities are becoming externally legible.","required_sources":[{"label":"signal_json","url":"https://onlylabs.fyi/signals/e26bb3d1-6e91-454d-9538-a95f39136b19/signal.json","required":true},{"label":"source","url":"https://www.anthropic.com/research/petri-open-source-auditing","required":true},{"label":"dossier_json","url":"https://onlylabs.fyi/labs/anthropic/dossier.json","required":true},{"label":"analysis_evidence_json","url":"https://onlylabs.fyi/analysis/anthropic/evidence.json","required":true},{"label":"topic_signals_json","url":"https://onlylabs.fyi/topics/talking/signals.json","required":false},{"label":"data_radar_json","url":null,"required":false}],"expected_output":["one-paragraph source-grounded interpretation","category-specific implication","confidence and missing evidence","recommended next source to inspect"],"prompt_seed":"Using only the linked onlylabs JSON, captured source context, and cited 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has lab Anthropic."},{"subject":"Petri Open Source Auditing","predicate":"has signal desk","object":"talking","text":"Petri Open Source Auditing has signal desk talking."},{"subject":"Petri Open Source Auditing","predicate":"has source host","object":"anthropic.com","text":"Petri Open Source Auditing has source host anthropic.com."},{"subject":"Petri Open Source Auditing","predicate":"has watch term","object":"Eval methodology","text":"Petri Open Source Auditing has watch term Eval methodology."},{"subject":"Petri Open Source Auditing","predicate":"has watch term","object":"Safety and alignment","text":"Petri Open Source Auditing has watch term Safety and alignment."},{"subject":"Petri Open Source Auditing","predicate":"has watch term","object":"Agents and tool use","text":"Petri Open Source Auditing has watch term Agents and tool use."}]},"intelligence":{"signal_desk":"talking","answer":"Anthropic published Petri Open Source Auditing. This talking signal gives public context for research themes, product direction, policy, or launch framing. High-signal details: Petri: An open-source auditing tool to accelerate AI safety research \\ Anthropic Alignment Petri: An open-source auditing tool to accelerate AI safety research Oct 6,.... onlylabs links this event to 1 captured evidence page and 6 related writing signals.","semantic_triples":[{"subject":"Anthropic","predicate":"published","object":"Petri Open Source Auditing","text":"Anthropic published Petri Open Source Auditing."},{"subject":"Petri Open Source Auditing","predicate":"is classified as","object":"writing signal","text":"Petri Open Source Auditing is classified as writing signal."},{"subject":"Petri Open Source Auditing","predicate":"belongs to","object":"talking desk","text":"Petri Open Source Auditing belongs to talking desk."},{"subject":"Petri Open Source Auditing","predicate":"has evidence coverage","object":"1 captured evidence page","text":"Petri Open Source Auditing has evidence coverage 1 captured evidence page."}]},"signal":{"id":"e26bb3d1-6e91-454d-9538-a95f39136b19","url":"https://onlylabs.fyi/signals/e26bb3d1-6e91-454d-9538-a95f39136b19","json_url":"https://onlylabs.fyi/signals/e26bb3d1-6e91-454d-9538-a95f39136b19/signal.json","source_url":"https://www.anthropic.com/research/petri-open-source-auditing","title":"Petri Open Source Auditing","summary":"Anthropic published a writing signal. onlylabs watches public writing for research themes, product direction, and model-launch context.","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2025-10-06T17:12:39+00:00","first_seen_at":"2026-06-09T02:17:26.339488+00:00","date_source":"sitemap.lastmod","evidence_coverage":{"target_pages":1,"captured_pages":1,"readable_pages":1,"capture_methods":["plain"],"missing_page_urls":[],"failed_page_urls":[],"blocked_page_urls":[],"page_urls":["https://www.anthropic.com/research/petri-open-source-auditing"]},"facets":{},"traction":{"github_stars":null,"hn_points":null,"hn_comments":null,"hn_story_id":null,"hf_downloads":null,"hf_likes":null},"data_radar":null},"primary_evidence_page":{"url":"https://www.anthropic.com/research/petri-open-source-auditing","final_url":"https://www.anthropic.com/research/petri-open-source-auditing","title":"Petri Open Source Auditing","http_status":200,"content_type":"text/html; charset=utf-8","capture_method":"plain","fetched_at":"2026-06-11T04:15:55.752+00:00","bytes":142905,"raw_path":"62c583fb4c6af13a49eb77fa7efd1943e4c77ea28fba3864af8901af0c7fdd97.html","content_hash":"19845873b35d12a0bb6451675367713e8361299c4fa9f1cbd43b94352b219657","excerpt_chars":1200,"truncated":true,"excerpt":"Petri: An open-source auditing tool to accelerate AI safety research \\ Anthropic Alignment Petri: An open-source auditing tool to accelerate AI safety research Oct 6, 2025 Read the technical report Petri (Parallel Exploration Tool for Risky Interactions) is our new open-source tool that enables researchers to explore hypotheses about model behavior with ease. Petri deploys an automated agent to test a target AI system through diverse multi-turn conversations involving simulated users and tools; Petri then scores and summarizes the target’s behavior. This automation handles a significant part of the work that one needs to do to build a broad understanding of a new model, and makes it possible to test many individual hypotheses about how a model might behave in some new circumstance with only minutes of hands-on effort. As AI becomes more capable and is deployed across more domains and with wide-ranging affordances, we need to evaluate a broader range of behaviors. This makes it increasingly difficult for humans to properly audit each model—the sheer volume and complexity of potential behaviors far exceeds what researchers can manually test. We’ve found it valuable to turn to..."},"evidence_pages":[{"url":"https://www.anthropic.com/research/petri-open-source-auditing","final_url":"https://www.anthropic.com/research/petri-open-source-auditing","title":"Petri Open Source Auditing","http_status":200,"content_type":"text/html; charset=utf-8","capture_method":"plain","fetched_at":"2026-06-11T04:15:55.752+00:00","bytes":142905,"raw_path":"62c583fb4c6af13a49eb77fa7efd1943e4c77ea28fba3864af8901af0c7fdd97.html","content_hash":"19845873b35d12a0bb6451675367713e8361299c4fa9f1cbd43b94352b219657","excerpt_chars":1200,"truncated":true,"excerpt":"Petri: An open-source auditing tool to accelerate AI safety research \\ Anthropic Alignment Petri: An open-source auditing tool to accelerate AI safety research Oct 6, 2025 Read the technical report Petri (Parallel Exploration Tool for Risky Interactions) is our new open-source tool that enables researchers to explore hypotheses about model behavior with ease. Petri deploys an automated agent to test a target AI system through diverse multi-turn conversations involving simulated users and tools; Petri then scores and summarizes the target’s behavior. This automation handles a significant part of the work that one needs to do to build a broad understanding of a new model, and makes it possible to test many individual hypotheses about how a model might behave in some new circumstance with only minutes of hands-on effort. As AI becomes more capable and is deployed across more domains and with wide-ranging affordances, we need to evaluate a broader range of behaviors. This makes it increasingly difficult for humans to properly audit each model—the sheer volume and complexity of potential behaviors far exceeds what researchers can manually test. 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