{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:DT7QFW6KCJEFBNM5HIB4ZYXTZC","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":"1f156c5e560e272e3a9e02a044f9e715b6bf082b592381974d8dffec4e7f0d34","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2026-07-15T06:55:28Z","title_canon_sha256":"0d8777635499cd895f23946ad297289d4f43920e98e67862a8493fb6dfa6cd11"},"schema_version":"1.0","source":{"id":"2607.13501","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.13501","created_at":"2026-07-16T01:22:16Z"},{"alias_kind":"arxiv_version","alias_value":"2607.13501v1","created_at":"2026-07-16T01:22:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.13501","created_at":"2026-07-16T01:22:16Z"},{"alias_kind":"pith_short_12","alias_value":"DT7QFW6KCJEF","created_at":"2026-07-16T01:22:16Z"},{"alias_kind":"pith_short_16","alias_value":"DT7QFW6KCJEFBNM5","created_at":"2026-07-16T01:22:16Z"},{"alias_kind":"pith_short_8","alias_value":"DT7QFW6K","created_at":"2026-07-16T01:22:16Z"}],"graph_snapshots":[{"event_id":"sha256:d5e0b85a887a66887c0bf3deb9bce2f1b55b784874f1d48a36f17243c5e5fe93","target":"graph","created_at":"2026-07-16T01:22:16Z","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/2607.13501/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Reinforcement learning for multi-turn search reasoning typically relies on terminal outcome rewards, which cannot distinguish useful, redundant, and harmful intermediate interactions. We propose LAPO, a self-generated process-supervision method based on backward leave-one-turn attribution. For each search turn, LAPO replaces the turn and its retrieval observation with a fixed [DELETE] placeholder and measures the resulting change in the current policy's mean log-likelihood of the gold answer. This Answer-Likelihood Gain estimates the turn's contribution while preserving all downstream interact","authors_text":"Jiajun Wu, Qiang Zhu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2026-07-15T06:55:28Z","title":"LAPO: Leave-One-Turn Attribution for Self-Generated Process Rewards in Multi-Turn Search Reasoning"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.13501","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":"sha256:912929ee7cc137993036ce228a585bdf579d8c6f310bca116512cd0bf575d03a","target":"record","created_at":"2026-07-16T01:22:16Z","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":"1f156c5e560e272e3a9e02a044f9e715b6bf082b592381974d8dffec4e7f0d34","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2026-07-15T06:55:28Z","title_canon_sha256":"0d8777635499cd895f23946ad297289d4f43920e98e67862a8493fb6dfa6cd11"},"schema_version":"1.0","source":{"id":"2607.13501","kind":"arxiv","version":1}},"canonical_sha256":"1cff02dbca124850b59d3a03cce2f3c89e0accc60a53db2f998f0d051f078204","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1cff02dbca124850b59d3a03cce2f3c89e0accc60a53db2f998f0d051f078204","first_computed_at":"2026-07-16T01:22:16.183129Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-16T01:22:16.183129Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"399iSs8XkM/EKoZXwxY7ya9FY3iIxM/pXej5aT/3Elu7VlA+a/KBUQL58Dw6YTHmudLSM/wMhEBGI+tPAwzKAQ==","signature_status":"signed_v1","signed_at":"2026-07-16T01:22:16.183974Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.13501","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:912929ee7cc137993036ce228a585bdf579d8c6f310bca116512cd0bf575d03a","sha256:d5e0b85a887a66887c0bf3deb9bce2f1b55b784874f1d48a36f17243c5e5fe93"],"state_sha256":"a14ecceca18ece840bad3b2fa0abbaeb0652a40add3a83a0eae38a118dc65f20"}