{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:PK2BUOS4FCO4FYJX7QKMRRSK5U","short_pith_number":"pith:PK2BUOS4","canonical_record":{"source":{"id":"2606.22731","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2026-06-22T00:18:27Z","cross_cats_sorted":["cs.MA"],"title_canon_sha256":"79ed2f3a853f731870f27611d33b21b3fbc71805fb6e843217a018764210b171","abstract_canon_sha256":"146e1dae71c89d85da6c4f4b57cfdbd8d7bdc28c8769f50ff24abae16477af5f"},"schema_version":"1.0"},"canonical_sha256":"7ab41a3a5c289dc2e137fc14c8c64aed0b80e4406a49d86aef9173546477d4df","source":{"kind":"arxiv","id":"2606.22731","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.22731","created_at":"2026-06-23T02:13:45Z"},{"alias_kind":"arxiv_version","alias_value":"2606.22731v1","created_at":"2026-06-23T02:13:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.22731","created_at":"2026-06-23T02:13:45Z"},{"alias_kind":"pith_short_12","alias_value":"PK2BUOS4FCO4","created_at":"2026-06-23T02:13:45Z"},{"alias_kind":"pith_short_16","alias_value":"PK2BUOS4FCO4FYJX","created_at":"2026-06-23T02:13:45Z"},{"alias_kind":"pith_short_8","alias_value":"PK2BUOS4","created_at":"2026-06-23T02:13:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:PK2BUOS4FCO4FYJX7QKMRRSK5U","target":"record","payload":{"canonical_record":{"source":{"id":"2606.22731","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2026-06-22T00:18:27Z","cross_cats_sorted":["cs.MA"],"title_canon_sha256":"79ed2f3a853f731870f27611d33b21b3fbc71805fb6e843217a018764210b171","abstract_canon_sha256":"146e1dae71c89d85da6c4f4b57cfdbd8d7bdc28c8769f50ff24abae16477af5f"},"schema_version":"1.0"},"canonical_sha256":"7ab41a3a5c289dc2e137fc14c8c64aed0b80e4406a49d86aef9173546477d4df","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-23T02:13:45.877193Z","signature_b64":"l4LE93WEwJ/2ABnAKWvpR0I2YfM1YFqfhze75slpp3u3ydvI0RfteGm6H5DwJtVKx+Mvqm3iQxqArVuT+WyPCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7ab41a3a5c289dc2e137fc14c8c64aed0b80e4406a49d86aef9173546477d4df","last_reissued_at":"2026-06-23T02:13:45.876805Z","signature_status":"signed_v1","first_computed_at":"2026-06-23T02:13:45.876805Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.22731","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-23T02:13:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tKMt1MjaePmVN5UnU0OoUUdSdR8juYt+KB78XPFkC8j4s2QIXveDjIkGo39sTSXpgWr4FSqGEcPmsMoaOKd7Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T20:53:48.402802Z"},"content_sha256":"02e79be9dc6df62578f5d7790de583b5b0bfaef2e76f5875c4e3e3cb8d7088f5","schema_version":"1.0","event_id":"sha256:02e79be9dc6df62578f5d7790de583b5b0bfaef2e76f5875c4e3e3cb8d7088f5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:PK2BUOS4FCO4FYJX7QKMRRSK5U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Closed-loop Auto Research for Molecular Property Prediction: Discovering and Certifying Generalizable Improvements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.MA"],"primary_cat":"cs.AI","authors_text":"Chenyan Xiong, Guolin Ke, Jingjie Ning, Ji Zeng, Xiaochuan Li","submitted_at":"2026-06-22T00:18:27Z","abstract_excerpt":"Closed-loop Auto Research extends automated machine learning from fixed-dataset fitting to changing the research workflow, with language-model agents editing representations and model code and acquiring external evidence. Molecular property prediction spans many small endpoints. We ask whether this action space yields improvements generalizing beyond the validation signal selecting them.\n  We isolate three Auto Research axes, features, models, and external evidence, under a file-level ablation lock attributing each gain to one axis over a strong baseline. Across 36 endpoints in three benchmark"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.22731","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.22731/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-23T02:13:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+NBnSI2QexaAdyyLpE7eH8bNHcGCPkQnpPu3+r259fDVTk6JSceyZXXqPCXmnEkggTbDKI3CS35vPGmbjJxTDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T20:53:48.403176Z"},"content_sha256":"a58c03733f5d06f121c95e8b0fd188c6a4fdf88eb2be3938b837818686ce7979","schema_version":"1.0","event_id":"sha256:a58c03733f5d06f121c95e8b0fd188c6a4fdf88eb2be3938b837818686ce7979"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PK2BUOS4FCO4FYJX7QKMRRSK5U/bundle.json","state_url":"https://pith.science/pith/PK2BUOS4FCO4FYJX7QKMRRSK5U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PK2BUOS4FCO4FYJX7QKMRRSK5U/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-27T20:53:48Z","links":{"resolver":"https://pith.science/pith/PK2BUOS4FCO4FYJX7QKMRRSK5U","bundle":"https://pith.science/pith/PK2BUOS4FCO4FYJX7QKMRRSK5U/bundle.json","state":"https://pith.science/pith/PK2BUOS4FCO4FYJX7QKMRRSK5U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PK2BUOS4FCO4FYJX7QKMRRSK5U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:PK2BUOS4FCO4FYJX7QKMRRSK5U","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"146e1dae71c89d85da6c4f4b57cfdbd8d7bdc28c8769f50ff24abae16477af5f","cross_cats_sorted":["cs.MA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2026-06-22T00:18:27Z","title_canon_sha256":"79ed2f3a853f731870f27611d33b21b3fbc71805fb6e843217a018764210b171"},"schema_version":"1.0","source":{"id":"2606.22731","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.22731","created_at":"2026-06-23T02:13:45Z"},{"alias_kind":"arxiv_version","alias_value":"2606.22731v1","created_at":"2026-06-23T02:13:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.22731","created_at":"2026-06-23T02:13:45Z"},{"alias_kind":"pith_short_12","alias_value":"PK2BUOS4FCO4","created_at":"2026-06-23T02:13:45Z"},{"alias_kind":"pith_short_16","alias_value":"PK2BUOS4FCO4FYJX","created_at":"2026-06-23T02:13:45Z"},{"alias_kind":"pith_short_8","alias_value":"PK2BUOS4","created_at":"2026-06-23T02:13:45Z"}],"graph_snapshots":[{"event_id":"sha256:a58c03733f5d06f121c95e8b0fd188c6a4fdf88eb2be3938b837818686ce7979","target":"graph","created_at":"2026-06-23T02:13:45Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2606.22731/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Closed-loop Auto Research extends automated machine learning from fixed-dataset fitting to changing the research workflow, with language-model agents editing representations and model code and acquiring external evidence. Molecular property prediction spans many small endpoints. We ask whether this action space yields improvements generalizing beyond the validation signal selecting them.\n  We isolate three Auto Research axes, features, models, and external evidence, under a file-level ablation lock attributing each gain to one axis over a strong baseline. Across 36 endpoints in three benchmark","authors_text":"Chenyan Xiong, Guolin Ke, Jingjie Ning, Ji Zeng, Xiaochuan Li","cross_cats":["cs.MA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2026-06-22T00:18:27Z","title":"Closed-loop Auto Research for Molecular Property Prediction: Discovering and Certifying Generalizable Improvements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.22731","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:02e79be9dc6df62578f5d7790de583b5b0bfaef2e76f5875c4e3e3cb8d7088f5","target":"record","created_at":"2026-06-23T02:13:45Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"146e1dae71c89d85da6c4f4b57cfdbd8d7bdc28c8769f50ff24abae16477af5f","cross_cats_sorted":["cs.MA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2026-06-22T00:18:27Z","title_canon_sha256":"79ed2f3a853f731870f27611d33b21b3fbc71805fb6e843217a018764210b171"},"schema_version":"1.0","source":{"id":"2606.22731","kind":"arxiv","version":1}},"canonical_sha256":"7ab41a3a5c289dc2e137fc14c8c64aed0b80e4406a49d86aef9173546477d4df","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7ab41a3a5c289dc2e137fc14c8c64aed0b80e4406a49d86aef9173546477d4df","first_computed_at":"2026-06-23T02:13:45.876805Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-23T02:13:45.876805Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"l4LE93WEwJ/2ABnAKWvpR0I2YfM1YFqfhze75slpp3u3ydvI0RfteGm6H5DwJtVKx+Mvqm3iQxqArVuT+WyPCg==","signature_status":"signed_v1","signed_at":"2026-06-23T02:13:45.877193Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.22731","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:02e79be9dc6df62578f5d7790de583b5b0bfaef2e76f5875c4e3e3cb8d7088f5","sha256:a58c03733f5d06f121c95e8b0fd188c6a4fdf88eb2be3938b837818686ce7979"],"state_sha256":"482593108675b430a431552088e2aa0afb189a812e7e1e974fa9bf3c1db8d68b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oi3r36v9AjdZ0UZEONshMogDcW9/PrBSLmliXSjE3KinRFycJ7mFqmFYuuHx19UiSosFTzeN/ticbSxySwBWDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T20:53:48.405295Z","bundle_sha256":"6220c003f28b7fa67126739b3a1a1f40f028a10cc345ae521f0d32f27657f1e5"}}