{"schema_version":"onlylabs.public_signal.v1","title":"Anthropic Writing: Donating Open Source Petri","description":"Anthropic writing signal with public source context, captured evidence pages, related signals, and data-business radar classification.","url":"https://onlylabs.fyi/signals/a021cfc8-accb-45ac-9f3b-e0be662ce60f","json_url":"https://onlylabs.fyi/signals/a021cfc8-accb-45ac-9f3b-e0be662ce60f/signal.json","generated_at":"2026-06-09T02:21:59.5248+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/a021cfc8-accb-45ac-9f3b-e0be662ce60f","signal_json":"https://onlylabs.fyi/signals/a021cfc8-accb-45ac-9f3b-e0be662ce60f/signal.json","source":"https://www.anthropic.com/research/donating-open-source-petri","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 Donating Open Source Petri. This talking signal gives public context for research themes, product direction, policy, or launch framing. High-signal details: Donating our open-source alignment tool \\ Anthropic Alignment Donating our open-source alignment tool May 7, 2026 In October 2025, we launched Petri , an open-source.... 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/donating-open-source-petri","source_host":"anthropic.com","occurred_at":"2026-05-07T21:27:38+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 use","source":"evidence"}],"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/donating-open-source-petri"],"related_signals":6,"has_source_url":true,"latest_page_fetched_at":"2026-06-09T02:21:59.5248+00:00"},"data_business":{"matches":false,"lanes":[],"matched_terms":[],"score":null,"reason":null},"agent_handoff":{"signal_json":"https://onlylabs.fyi/signals/a021cfc8-accb-45ac-9f3b-e0be662ce60f/signal.json","dossier_json":"https://onlylabs.fyi/labs/anthropic/dossier.json","analysis_json":"https://onlylabs.fyi/analysis/anthropic/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/anthropic/evidence.json","topic_signals_json":"https://onlylabs.fyi/topics/talking/signals.json","topic_feed":"https://onlylabs.fyi/topics/talking/feed.xml","category_signals_json":"https://onlylabs.fyi/signals.json","data_radar_json":null,"opportunities_json":null},"analysis_playbook":{"objective":"Turn 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/a021cfc8-accb-45ac-9f3b-e0be662ce60f/signal.json","required":true},{"label":"source","url":"https://www.anthropic.com/research/donating-open-source-petri","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 evidence, analyze Anthropic's writing signal \"Donating Open Source Petri\" for frontier lab strategy."},"semantic_triples":[{"subject":"Anthropic","predicate":"published","object":"Donating Open Source Petri","text":"Anthropic published Donating Open Source Petri."},{"subject":"Donating Open Source Petri","predicate":"is classified as","object":"writing signal","text":"Donating Open Source Petri is classified as writing signal."},{"subject":"Donating Open Source Petri","predicate":"belongs to","object":"talking desk","text":"Donating Open Source Petri belongs to talking desk."},{"subject":"Donating Open Source Petri","predicate":"has evidence coverage","object":"1 captured evidence page","text":"Donating Open Source Petri has evidence coverage 1 captured evidence page."},{"subject":"Donating Open Source Petri","predicate":"has captured page count","object":"1","text":"Donating Open Source Petri has captured page count 1."},{"subject":"Donating Open Source Petri","predicate":"has readable page count","object":"1","text":"Donating Open Source Petri has readable page count 1."},{"subject":"Donating Open Source Petri","predicate":"has related signal count","object":"6","text":"Donating Open Source Petri has related signal count 6."},{"subject":"Donating Open Source Petri","predicate":"has analysis playbook objective","object":"Turn public writing and discussion into a readable map of research themes, product framing, policy posture, launch narratives, and market attention.","text":"Donating Open Source Petri has analysis playbook objective Turn public writing and discussion into a readable map of research themes, product framing, policy posture, launch narratives, and market attention.."},{"subject":"Donating Open Source Petri","predicate":"has source host","object":"anthropic.com","text":"Donating Open Source Petri has source host anthropic.com."},{"subject":"Donating Open Source Petri","predicate":"has lab","object":"Anthropic","text":"Donating Open Source Petri has lab Anthropic."},{"subject":"Donating Open Source Petri","predicate":"has signal desk","object":"talking","text":"Donating Open Source Petri has signal desk talking."},{"subject":"Donating Open Source Petri","predicate":"has source host","object":"anthropic.com","text":"Donating Open Source Petri has source host anthropic.com."},{"subject":"Donating Open Source Petri","predicate":"has watch term","object":"Eval methodology","text":"Donating Open Source Petri has watch term Eval methodology."},{"subject":"Donating Open Source Petri","predicate":"has watch term","object":"Safety and alignment","text":"Donating Open Source Petri has watch term Safety and alignment."},{"subject":"Donating Open Source Petri","predicate":"has watch term","object":"Agents and tool use","text":"Donating Open Source Petri has watch term Agents and tool use."}]},"intelligence":{"signal_desk":"talking","answer":"Anthropic published Donating Open Source Petri. This talking signal gives public context for research themes, product direction, policy, or launch framing. High-signal details: Donating our open-source alignment tool \\ Anthropic Alignment Donating our open-source alignment tool May 7, 2026 In October 2025, we launched Petri , an open-source.... onlylabs links this event to 1 captured evidence page and 6 related writing signals.","semantic_triples":[{"subject":"Anthropic","predicate":"published","object":"Donating Open Source Petri","text":"Anthropic published Donating Open Source Petri."},{"subject":"Donating Open Source Petri","predicate":"is classified as","object":"writing signal","text":"Donating Open Source Petri is classified as writing signal."},{"subject":"Donating Open Source Petri","predicate":"belongs to","object":"talking desk","text":"Donating Open Source Petri belongs to talking desk."},{"subject":"Donating Open Source Petri","predicate":"has evidence coverage","object":"1 captured evidence page","text":"Donating Open Source Petri has evidence coverage 1 captured evidence page."}]},"signal":{"id":"a021cfc8-accb-45ac-9f3b-e0be662ce60f","url":"https://onlylabs.fyi/signals/a021cfc8-accb-45ac-9f3b-e0be662ce60f","json_url":"https://onlylabs.fyi/signals/a021cfc8-accb-45ac-9f3b-e0be662ce60f/signal.json","source_url":"https://www.anthropic.com/research/donating-open-source-petri","title":"Donating Open Source Petri","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":"2026-05-07T21:27:38+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/donating-open-source-petri"]},"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/donating-open-source-petri","final_url":"https://www.anthropic.com/research/donating-open-source-petri","title":"Donating Open Source Petri","http_status":200,"content_type":"text/html; charset=utf-8","capture_method":"plain","fetched_at":"2026-06-09T02:21:59.5248+00:00","bytes":115504,"raw_path":"04eef9e16814da8ae09c0f0cc546f0451d53f1b9cf11a5de90ce3d12452ec5db.html","content_hash":"43799c7083b812d6d6f5472707f445f8f74dd79cb4017e0703ab79d7da6856d4","excerpt_chars":1200,"truncated":true,"excerpt":"Donating our open-source alignment tool \\ Anthropic Alignment Donating our open-source alignment tool May 7, 2026 In October 2025, we launched Petri , an open-source toolbox of alignment tests that can be applied to any large language model. Petri, which was developed as part of our Anthropic Fellows program, can be used to rapidly and easily test AI models for concerning tendencies like deception, sycophancy, and cooperation with harmful requests. It’s part of our efforts to develop alignment tools that are open and useful for the whole AI development community. Petri has been part of our alignment assessment for every Claude model since Claude Sonnet 4.5. It compares how the new model behaves across a range of alignment-relevant scenarios that are simulated by a separate “auditor” model. A further “judge” model then scores the resulting transcripts for misaligned behaviors. We’ve been pleased to see Petri being used by external organizations: for example, the UK’s AI Security Institute (AISI) made it a major part of how they evaluate models for their propensity to sabotage AI research. We’re now updating Petri to its third version. Here are some of the biggest changes:..."},"evidence_pages":[{"url":"https://www.anthropic.com/research/donating-open-source-petri","final_url":"https://www.anthropic.com/research/donating-open-source-petri","title":"Donating Open Source Petri","http_status":200,"content_type":"text/html; charset=utf-8","capture_method":"plain","fetched_at":"2026-06-09T02:21:59.5248+00:00","bytes":115504,"raw_path":"04eef9e16814da8ae09c0f0cc546f0451d53f1b9cf11a5de90ce3d12452ec5db.html","content_hash":"43799c7083b812d6d6f5472707f445f8f74dd79cb4017e0703ab79d7da6856d4","excerpt_chars":1200,"truncated":true,"excerpt":"Donating our open-source alignment tool \\ Anthropic Alignment Donating our open-source alignment tool May 7, 2026 In October 2025, we launched Petri , an open-source toolbox of alignment tests that can be applied to any large language model. Petri, which was developed as part of our Anthropic Fellows program, can be used to rapidly and easily test AI models for concerning tendencies like deception, sycophancy, and cooperation with harmful requests. It’s part of our efforts to develop alignment tools that are open and useful for the whole AI development community. Petri has been part of our alignment assessment for every Claude model since Claude Sonnet 4.5. It compares how the new model behaves across a range of alignment-relevant scenarios that are simulated by a separate “auditor” model. A further “judge” model then scores the resulting transcripts for misaligned behaviors. We’ve been pleased to see Petri being used by external organizations: for example, the UK’s AI Security Institute (AISI) made it a major part of how they evaluate models for their propensity to sabotage AI research. We’re now updating Petri to its third version. Here are some of the biggest changes:..."}],"related_signals":[{"id":"6c78c028-3ab4-4b33-86f7-d86c8ba9e3ba","url":"https://onlylabs.fyi/signals/6c78c028-3ab4-4b33-86f7-d86c8ba9e3ba","source_url":"https://www.anthropic.com/research/agents-in-biology","title":"Agents In Biology","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-06-10T15:16:01+00:00","first_seen_at":"2026-06-09T02:17:26.339488+00:00","date_source":"sitemap.lastmod"},{"id":"2648db51-9d6a-42a9-aece-a0ca5f9ce64f","url":"https://onlylabs.fyi/signals/2648db51-9d6a-42a9-aece-a0ca5f9ce64f","source_url":"https://www.anthropic.com/news/claude-fable-5-mythos-5","title":"Claude Fable 5 Mythos 5","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-06-09T20:27:50+00:00","first_seen_at":"2026-06-10T07:01:05.666054+00:00","date_source":"sitemap.lastmod"},{"id":"8475487f-45b4-4689-9bc5-8e4c6ca0457d","url":"https://onlylabs.fyi/signals/8475487f-45b4-4689-9bc5-8e4c6ca0457d","source_url":"https://www.anthropic.com/engineering/how-we-contain-claude","title":"How We Contain Claude","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-06-06T00:28:16+00:00","first_seen_at":"2026-06-09T02:17:26.339488+00:00","date_source":"sitemap.lastmod"},{"id":"e4fbfcdd-15b4-41b9-b011-fd83e7068ae9","url":"https://onlylabs.fyi/signals/e4fbfcdd-15b4-41b9-b011-fd83e7068ae9","source_url":"https://www.anthropic.com/research/making-claude-a-chemist","title":"Making Claude A Chemist","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-06-05T20:13:40+00:00","first_seen_at":"2026-06-09T02:17:26.339488+00:00","date_source":"sitemap.lastmod"},{"id":"cc62deba-9682-4751-aa6b-81c3bd7122a0","url":"https://onlylabs.fyi/signals/cc62deba-9682-4751-aa6b-81c3bd7122a0","source_url":"https://www.anthropic.com/research/measuring-agent-autonomy","title":"Measuring Agent Autonomy","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-06-05T15:49:18+00:00","first_seen_at":"2026-06-09T02:17:26.339488+00:00","date_source":"sitemap.lastmod"},{"id":"93da14fd-7141-4e17-abd6-1c8d52435c70","url":"https://onlylabs.fyi/signals/93da14fd-7141-4e17-abd6-1c8d52435c70","source_url":"https://www.anthropic.com/research/values-wild","title":"Values Wild","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2026-06-05T15:38:54+00:00","first_seen_at":"2026-06-09T02:17:26.339488+00:00","date_source":"sitemap.lastmod"}]}