{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:DLYA54WX36RCPNLHTAUDQOIDIF","short_pith_number":"pith:DLYA54WX","schema_version":"1.0","canonical_sha256":"1af00ef2d7dfa227b567982838390341579772e82a1c6a5ca139bcff594351a2","source":{"kind":"arxiv","id":"2607.28818","version":1},"attestation_state":"computed","paper":{"title":"Best Friends, Not Forever: Evaluating Long-Horizon Persona Collapse and Behavioral Drift in AI Companions","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["cs.CL"],"primary_cat":"cs.AI","authors_text":"Akshara Prabhakar, Chien-Sheng Wu, Daniel Lee, Pranav Narayanan Venkit, Yu Li","submitted_at":"2026-07-30T20:18:39Z","abstract_excerpt":"As AI companions increasingly mediate repeated social interaction, users may rely on a stable role and shared history, yet locally acceptable replies do not ensure that either persists. We study two observable long-horizon failures: 'persona collapse', the loss of a deployed role, boundaries, values, or style, and 'behavioral drift', the gradual or recurrent erosion of those properties. We introduce ANCHOR, a controlled synthetic audit that separately measures persona enactment and trajectory recall. The study contains 2,008 conversations spanning 27 personas, nine interaction schedules, three"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2607.28818","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.AI","submitted_at":"2026-07-30T20:18:39Z","cross_cats_sorted":["cs.CL"],"title_canon_sha256":"9aefa1713813c201ecd22530afb1dea245c91e274192dad287c8edf8e8c178ca","abstract_canon_sha256":"3ea6d9149d93d866b4b09274874f71bbeed9b443de4539240817d42484273b89"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-03T00:13:07.864226Z","signature_b64":"GQimhYhvfFbsgE8FjVuZOH8032lyX17yvj1AJjBtBBqDRYwa60wdxKWXEv89rAepL0TdmNeCjFnLFwQ0QHpGAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1af00ef2d7dfa227b567982838390341579772e82a1c6a5ca139bcff594351a2","last_reissued_at":"2026-08-03T00:13:07.862067Z","signature_status":"signed_v1","first_computed_at":"2026-08-03T00:13:07.862067Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Best Friends, Not Forever: Evaluating Long-Horizon Persona Collapse and Behavioral Drift in AI Companions","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["cs.CL"],"primary_cat":"cs.AI","authors_text":"Akshara Prabhakar, Chien-Sheng Wu, Daniel Lee, Pranav Narayanan Venkit, Yu Li","submitted_at":"2026-07-30T20:18:39Z","abstract_excerpt":"As AI companions increasingly mediate repeated social interaction, users may rely on a stable role and shared history, yet locally acceptable replies do not ensure that either persists. We study two observable long-horizon failures: 'persona collapse', the loss of a deployed role, boundaries, values, or style, and 'behavioral drift', the gradual or recurrent erosion of those properties. We introduce ANCHOR, a controlled synthetic audit that separately measures persona enactment and trajectory recall. The study contains 2,008 conversations spanning 27 personas, nine interaction schedules, three"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.28818","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/2607.28818/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2607.28818","created_at":"2026-08-03T00:13:07.863526+00:00"},{"alias_kind":"arxiv_version","alias_value":"2607.28818v1","created_at":"2026-08-03T00:13:07.863526+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.28818","created_at":"2026-08-03T00:13:07.863526+00:00"},{"alias_kind":"pith_short_12","alias_value":"DLYA54WX36RC","created_at":"2026-08-03T00:13:07.863526+00:00"},{"alias_kind":"pith_short_16","alias_value":"DLYA54WX36RCPNLH","created_at":"2026-08-03T00:13:07.863526+00:00"},{"alias_kind":"pith_short_8","alias_value":"DLYA54WX","created_at":"2026-08-03T00:13:07.863526+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/DLYA54WX36RCPNLHTAUDQOIDIF","json":"https://pith.science/pith/DLYA54WX36RCPNLHTAUDQOIDIF.json","graph_json":"https://pith.science/api/pith-number/DLYA54WX36RCPNLHTAUDQOIDIF/graph.json","events_json":"https://pith.science/api/pith-number/DLYA54WX36RCPNLHTAUDQOIDIF/events.json","paper":"https://pith.science/paper/DLYA54WX"},"agent_actions":{"view_html":"https://pith.science/pith/DLYA54WX36RCPNLHTAUDQOIDIF","download_json":"https://pith.science/pith/DLYA54WX36RCPNLHTAUDQOIDIF.json","view_paper":"https://pith.science/paper/DLYA54WX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2607.28818&json=true","fetch_graph":"https://pith.science/api/pith-number/DLYA54WX36RCPNLHTAUDQOIDIF/graph.json","fetch_events":"https://pith.science/api/pith-number/DLYA54WX36RCPNLHTAUDQOIDIF/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/DLYA54WX36RCPNLHTAUDQOIDIF/action/timestamp_anchor","attest_storage":"https://pith.science/pith/DLYA54WX36RCPNLHTAUDQOIDIF/action/storage_attestation","attest_author":"https://pith.science/pith/DLYA54WX36RCPNLHTAUDQOIDIF/action/author_attestation","sign_citation":"https://pith.science/pith/DLYA54WX36RCPNLHTAUDQOIDIF/action/citation_signature","submit_replication":"https://pith.science/pith/DLYA54WX36RCPNLHTAUDQOIDIF/action/replication_record"}},"created_at":"2026-08-03T00:13:07.863526+00:00","updated_at":"2026-08-03T00:13:07.863526+00:00"}