{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:I7CFMEF3X6ENKFIDAJSGLAM72T","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":"d9490b309f57e7feeeab5c934b8c50414c919da4668b4099297f4c01bba06eed","cross_cats_sorted":["cs.NE"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.MA","submitted_at":"2026-08-05T06:46:28Z","title_canon_sha256":"1e79252d199814502422b2518214827dcc382b879212c765ae835973b689d2f3"},"schema_version":"1.0","source":{"id":"2608.04507","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.04507","created_at":"2026-08-06T01:35:44Z"},{"alias_kind":"arxiv_version","alias_value":"2608.04507v1","created_at":"2026-08-06T01:35:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.04507","created_at":"2026-08-06T01:35:44Z"},{"alias_kind":"pith_short_12","alias_value":"I7CFMEF3X6EN","created_at":"2026-08-06T01:35:44Z"},{"alias_kind":"pith_short_16","alias_value":"I7CFMEF3X6ENKFID","created_at":"2026-08-06T01:35:44Z"},{"alias_kind":"pith_short_8","alias_value":"I7CFMEF3","created_at":"2026-08-06T01:35:44Z"}],"graph_snapshots":[{"event_id":"sha256:10dcd0034b48200b7d49bb6d6e7b9dccc700916f4b55010455d3bdc483eb7c38","target":"graph","created_at":"2026-08-06T01:35:44Z","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/2608.04507/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Can cooperation among large language model (LLM) agents be evolutionarily stable against free-rider invasion? We study an indirect reciprocity donation game where LLM agents observe behavioral traces and donate on a continuous scale. Strategies, represented as natural language prompts, evolve through cultural transmission across generations. Across four LLM backends, robustness to free-rider invasion varies by more than an order of magnitude. The strongest predictor of this robustness is opponent endowment sensitivity, the degree to which agents discriminate between cooperative and uncooperati","authors_text":"Kazuya Horibe, Kenji Itao, Wataru Toyokawa","cross_cats":["cs.NE"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.MA","submitted_at":"2026-08-05T06:46:28Z","title":"Emergence of Reputation-Based Cooperation in LLM Agents"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.04507","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":"sha256:23582e710a543d5febfa8ab6ffd70349a6d740ede70c7823127e0b419abaaf99","target":"record","created_at":"2026-08-06T01:35:44Z","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":"d9490b309f57e7feeeab5c934b8c50414c919da4668b4099297f4c01bba06eed","cross_cats_sorted":["cs.NE"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.MA","submitted_at":"2026-08-05T06:46:28Z","title_canon_sha256":"1e79252d199814502422b2518214827dcc382b879212c765ae835973b689d2f3"},"schema_version":"1.0","source":{"id":"2608.04507","kind":"arxiv","version":1}},"canonical_sha256":"47c45610bbbf88d51503026465819fd4cc41f872f3fe9d5f614f8a1b3eb372d2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"47c45610bbbf88d51503026465819fd4cc41f872f3fe9d5f614f8a1b3eb372d2","first_computed_at":"2026-08-06T01:35:44.963185Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-06T01:35:44.963185Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IYSxoMfssnMo1OmZjvy6X8GRTPWd/hFWLkjqbvpHFgMnzAzaPwfLYzVtGja4NsWPRoqiwPJmIkuP6OHoxH8UBg==","signature_status":"signed_v1","signed_at":"2026-08-06T01:35:44.964676Z","signed_message":"canonical_sha256_bytes"},"source_id":"2608.04507","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:23582e710a543d5febfa8ab6ffd70349a6d740ede70c7823127e0b419abaaf99","sha256:10dcd0034b48200b7d49bb6d6e7b9dccc700916f4b55010455d3bdc483eb7c38"],"state_sha256":"51e6fc83d4029e605c8f9e72c32e89107f9839948ba449a8a35da0185eff6a2d"}