{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:JTQ3G5LDQPK5DBYAFDJW2B27OV","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":"93ee8c37137fab928e6b323f44e7f720f21767a3681f7545368576d96d1f3236","cross_cats_sorted":["cs.AI","cs.HC"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CL","submitted_at":"2025-04-06T02:57:58Z","title_canon_sha256":"36414c0e2b7f021cb91445f711748316e91e9f399661ea967c83f40a7b4403d1"},"schema_version":"1.0","source":{"id":"2504.04332","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.04332","created_at":"2026-07-05T11:14:28Z"},{"alias_kind":"arxiv_version","alias_value":"2504.04332v2","created_at":"2026-07-05T11:14:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.04332","created_at":"2026-07-05T11:14:28Z"},{"alias_kind":"pith_short_12","alias_value":"JTQ3G5LDQPK5","created_at":"2026-07-05T11:14:28Z"},{"alias_kind":"pith_short_16","alias_value":"JTQ3G5LDQPK5DBYA","created_at":"2026-07-05T11:14:28Z"},{"alias_kind":"pith_short_8","alias_value":"JTQ3G5LD","created_at":"2026-07-05T11:14:28Z"}],"graph_snapshots":[{"event_id":"sha256:425b4ffe5b5554cae67eb8a4d90bf660d406e51fe25f8784efaca3e17a5c9d22","target":"graph","created_at":"2026-07-05T11:14:28Z","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/2504.04332/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"As language models achieve increasingly human-like capabilities in conversational text generation, a critical question emerges: to what extent can these systems simulate the characteristics of specific individuals? To evaluate this, we introduce IMPersona, a framework for evaluating LMs at impersonating specific individuals' writing style and personal knowledge. Using supervised fine-tuning and a hierarchical memory-inspired retrieval system, we demonstrate that even modestly sized open-source models, such as Llama-3.1-8B-Instruct, can achieve impersonation abilities at concerning levels. In b","authors_text":"Adam Kelch, Brian Seo, Caden Yao, Carlos E. Jimenez, Karthik Narasimhan, Quan Shi, Stephen Dong","cross_cats":["cs.AI","cs.HC"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CL","submitted_at":"2025-04-06T02:57:58Z","title":"IMPersona: Evaluating Individual Level LM Impersonation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.04332","kind":"arxiv","version":2},"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:a1de17ad70293ff0f16faf26926420f668442cab8266d0a300597a8a51586acb","target":"record","created_at":"2026-07-05T11:14:28Z","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":"93ee8c37137fab928e6b323f44e7f720f21767a3681f7545368576d96d1f3236","cross_cats_sorted":["cs.AI","cs.HC"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CL","submitted_at":"2025-04-06T02:57:58Z","title_canon_sha256":"36414c0e2b7f021cb91445f711748316e91e9f399661ea967c83f40a7b4403d1"},"schema_version":"1.0","source":{"id":"2504.04332","kind":"arxiv","version":2}},"canonical_sha256":"4ce1b3756383d5d1870028d36d075f756a5fb76cda95a41b18b6e52a59e8b9eb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4ce1b3756383d5d1870028d36d075f756a5fb76cda95a41b18b6e52a59e8b9eb","first_computed_at":"2026-07-05T11:14:28.506417Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:14:28.506417Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UX3PWYKZOMEIcqYek/nfF4AJeO2Kj/PvNlxgQv2715oaYCE1oiv8Lo9yoIMt3YI6qynRk76a1I/UX6RbKI82Cw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:14:28.506897Z","signed_message":"canonical_sha256_bytes"},"source_id":"2504.04332","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a1de17ad70293ff0f16faf26926420f668442cab8266d0a300597a8a51586acb","sha256:425b4ffe5b5554cae67eb8a4d90bf660d406e51fe25f8784efaca3e17a5c9d22"],"state_sha256":"87228e94b1161e26064c4fb14e6a431d2a5256c316220191e938fbfad9f17375"}