{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:JTQ3G5LDQPK5DBYAFDJW2B27OV","short_pith_number":"pith:JTQ3G5LD","canonical_record":{"source":{"id":"2504.04332","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CL","submitted_at":"2025-04-06T02:57:58Z","cross_cats_sorted":["cs.AI","cs.HC"],"title_canon_sha256":"36414c0e2b7f021cb91445f711748316e91e9f399661ea967c83f40a7b4403d1","abstract_canon_sha256":"93ee8c37137fab928e6b323f44e7f720f21767a3681f7545368576d96d1f3236"},"schema_version":"1.0"},"canonical_sha256":"4ce1b3756383d5d1870028d36d075f756a5fb76cda95a41b18b6e52a59e8b9eb","source":{"kind":"arxiv","id":"2504.04332","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"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:JTQ3G5LDQPK5DBYAFDJW2B27OV","target":"record","payload":{"canonical_record":{"source":{"id":"2504.04332","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CL","submitted_at":"2025-04-06T02:57:58Z","cross_cats_sorted":["cs.AI","cs.HC"],"title_canon_sha256":"36414c0e2b7f021cb91445f711748316e91e9f399661ea967c83f40a7b4403d1","abstract_canon_sha256":"93ee8c37137fab928e6b323f44e7f720f21767a3681f7545368576d96d1f3236"},"schema_version":"1.0"},"canonical_sha256":"4ce1b3756383d5d1870028d36d075f756a5fb76cda95a41b18b6e52a59e8b9eb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:14:28.506897Z","signature_b64":"UX3PWYKZOMEIcqYek/nfF4AJeO2Kj/PvNlxgQv2715oaYCE1oiv8Lo9yoIMt3YI6qynRk76a1I/UX6RbKI82Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4ce1b3756383d5d1870028d36d075f756a5fb76cda95a41b18b6e52a59e8b9eb","last_reissued_at":"2026-07-05T11:14:28.506417Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:14:28.506417Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2504.04332","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:14:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qRixJdyePvrKh0nOmd+AcyUffXxYX0SLDpL02s1DgUr7IiCahDnME6FjjUsCo9qaqmE7ICHTRC/5jgCsdR7IBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T19:26:48.181853Z"},"content_sha256":"a1de17ad70293ff0f16faf26926420f668442cab8266d0a300597a8a51586acb","schema_version":"1.0","event_id":"sha256:a1de17ad70293ff0f16faf26926420f668442cab8266d0a300597a8a51586acb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:JTQ3G5LDQPK5DBYAFDJW2B27OV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"IMPersona: Evaluating Individual Level LM Impersonation","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.AI","cs.HC"],"primary_cat":"cs.CL","authors_text":"Adam Kelch, Brian Seo, Caden Yao, Carlos E. Jimenez, Karthik Narasimhan, Quan Shi, Stephen Dong","submitted_at":"2025-04-06T02:57:58Z","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"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.04332","kind":"arxiv","version":2},"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/2504.04332/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":"2026-07-05T11:14:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hUzNw7C5GBW3ZDrPPXZfqlPk4LvGDvcMynGPEfRADDiMSDdW4mhNrt+8zXLEFQswxB+FubEBBmQqYXZ8J3DGAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T19:26:48.182238Z"},"content_sha256":"425b4ffe5b5554cae67eb8a4d90bf660d406e51fe25f8784efaca3e17a5c9d22","schema_version":"1.0","event_id":"sha256:425b4ffe5b5554cae67eb8a4d90bf660d406e51fe25f8784efaca3e17a5c9d22"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JTQ3G5LDQPK5DBYAFDJW2B27OV/bundle.json","state_url":"https://pith.science/pith/JTQ3G5LDQPK5DBYAFDJW2B27OV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JTQ3G5LDQPK5DBYAFDJW2B27OV/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":"2026-08-04T19:26:48Z","links":{"resolver":"https://pith.science/pith/JTQ3G5LDQPK5DBYAFDJW2B27OV","bundle":"https://pith.science/pith/JTQ3G5LDQPK5DBYAFDJW2B27OV/bundle.json","state":"https://pith.science/pith/JTQ3G5LDQPK5DBYAFDJW2B27OV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JTQ3G5LDQPK5DBYAFDJW2B27OV/bundle.json"},"state":{"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"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DinTxELmdPmLljCNPu5/aRDk+HS0UwyEsZiXBm/WAWtk3o8wSBMmrhfnCTI7ddPK5GLw1rWmTTkk+yxpwtWoBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T19:26:48.184566Z","bundle_sha256":"cb0f5ae9cde70c47a4e9a10f900d1f50f54a91a9f19e71a52a30c2777ff1690f"}}