{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:YHZCAM3RYZKI3FKC5KSI6M3Y3M","short_pith_number":"pith:YHZCAM3R","canonical_record":{"source":{"id":"2507.09188","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2025-07-12T08:15:05Z","cross_cats_sorted":[],"title_canon_sha256":"6865221887b01ae5479178262e93611235fefa4a503274c62793b441b5339104","abstract_canon_sha256":"7826444fe230fbd27d19944a7935921490be0ba3bd138ca87df12ed372909aaa"},"schema_version":"1.0"},"canonical_sha256":"c1f2203371c6548d9542eaa48f3378db2c1897226d2de746509f6dcf7af8d623","source":{"kind":"arxiv","id":"2507.09188","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.09188","created_at":"2026-07-05T11:36:05Z"},{"alias_kind":"arxiv_version","alias_value":"2507.09188v1","created_at":"2026-07-05T11:36:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.09188","created_at":"2026-07-05T11:36:05Z"},{"alias_kind":"pith_short_12","alias_value":"YHZCAM3RYZKI","created_at":"2026-07-05T11:36:05Z"},{"alias_kind":"pith_short_16","alias_value":"YHZCAM3RYZKI3FKC","created_at":"2026-07-05T11:36:05Z"},{"alias_kind":"pith_short_8","alias_value":"YHZCAM3R","created_at":"2026-07-05T11:36:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:YHZCAM3RYZKI3FKC5KSI6M3Y3M","target":"record","payload":{"canonical_record":{"source":{"id":"2507.09188","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2025-07-12T08:15:05Z","cross_cats_sorted":[],"title_canon_sha256":"6865221887b01ae5479178262e93611235fefa4a503274c62793b441b5339104","abstract_canon_sha256":"7826444fe230fbd27d19944a7935921490be0ba3bd138ca87df12ed372909aaa"},"schema_version":"1.0"},"canonical_sha256":"c1f2203371c6548d9542eaa48f3378db2c1897226d2de746509f6dcf7af8d623","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:36:05.227334Z","signature_b64":"qbleD/1NzuGi7sKQR29ZAINfzJ2sbvuCKm49DwjCyzx0AYy4EZuEQy8EASlf/YZRSBte3rgFAhWFQOJcUKwqCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c1f2203371c6548d9542eaa48f3378db2c1897226d2de746509f6dcf7af8d623","last_reissued_at":"2026-07-05T11:36:05.226876Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:36:05.226876Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.09188","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:36:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UrLlByq9e/qrXPL4tIwXYfeyvZjea4SPWbxn7QsTWL0xF6+sN1F+g5G71L1gmXOIUiE0rjFRmUERFAjE+qZACw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T19:18:32.939656Z"},"content_sha256":"c03657f056d33cb8fee61bc76c22304559aee713caf31cd169cb0d82215c5453","schema_version":"1.0","event_id":"sha256:c03657f056d33cb8fee61bc76c22304559aee713caf31cd169cb0d82215c5453"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:YHZCAM3RYZKI3FKC5KSI6M3Y3M","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Retrieval-Augmented Recommendation Explanation Generation with Hierarchical Aggregation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.IR","authors_text":"Bangcheng Sun, Hui Li, Jilin Yang, Xiaodong Li, Yazhe Chen","submitted_at":"2025-07-12T08:15:05Z","abstract_excerpt":"Explainable Recommender System (ExRec) provides transparency to the recommendation process, increasing users' trust and boosting the operation of online services. With the rise of large language models (LLMs), whose extensive world knowledge and nuanced language understanding enable the generation of human-like, contextually grounded explanations, LLM-powered ExRec has gained great momentum. However, existing LLM-based ExRec models suffer from profile deviation and high retrieval overhead, hindering their deployment. To address these issues, we propose Retrieval-Augmented Recommendation Explan"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.09188","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/2507.09188/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":"2026-07-05T11:36:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B0gfUZp6xcJOZ/YNUaoLNs3hjKYloh3qN9NZe2ipsQp0e/hJ817d2RTIBnSdyPJ4j+rYOnibxDagwJkEYa+cAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T19:18:32.940174Z"},"content_sha256":"fcc69c2c7411c8ad2f9e996d4965a09924118ecb9918acd84258a0be0999494d","schema_version":"1.0","event_id":"sha256:fcc69c2c7411c8ad2f9e996d4965a09924118ecb9918acd84258a0be0999494d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YHZCAM3RYZKI3FKC5KSI6M3Y3M/bundle.json","state_url":"https://pith.science/pith/YHZCAM3RYZKI3FKC5KSI6M3Y3M/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YHZCAM3RYZKI3FKC5KSI6M3Y3M/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":"2026-08-08T19:18:32Z","links":{"resolver":"https://pith.science/pith/YHZCAM3RYZKI3FKC5KSI6M3Y3M","bundle":"https://pith.science/pith/YHZCAM3RYZKI3FKC5KSI6M3Y3M/bundle.json","state":"https://pith.science/pith/YHZCAM3RYZKI3FKC5KSI6M3Y3M/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YHZCAM3RYZKI3FKC5KSI6M3Y3M/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:YHZCAM3RYZKI3FKC5KSI6M3Y3M","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":"7826444fe230fbd27d19944a7935921490be0ba3bd138ca87df12ed372909aaa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2025-07-12T08:15:05Z","title_canon_sha256":"6865221887b01ae5479178262e93611235fefa4a503274c62793b441b5339104"},"schema_version":"1.0","source":{"id":"2507.09188","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.09188","created_at":"2026-07-05T11:36:05Z"},{"alias_kind":"arxiv_version","alias_value":"2507.09188v1","created_at":"2026-07-05T11:36:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.09188","created_at":"2026-07-05T11:36:05Z"},{"alias_kind":"pith_short_12","alias_value":"YHZCAM3RYZKI","created_at":"2026-07-05T11:36:05Z"},{"alias_kind":"pith_short_16","alias_value":"YHZCAM3RYZKI3FKC","created_at":"2026-07-05T11:36:05Z"},{"alias_kind":"pith_short_8","alias_value":"YHZCAM3R","created_at":"2026-07-05T11:36:05Z"}],"graph_snapshots":[{"event_id":"sha256:fcc69c2c7411c8ad2f9e996d4965a09924118ecb9918acd84258a0be0999494d","target":"graph","created_at":"2026-07-05T11:36:05Z","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/2507.09188/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Explainable Recommender System (ExRec) provides transparency to the recommendation process, increasing users' trust and boosting the operation of online services. With the rise of large language models (LLMs), whose extensive world knowledge and nuanced language understanding enable the generation of human-like, contextually grounded explanations, LLM-powered ExRec has gained great momentum. However, existing LLM-based ExRec models suffer from profile deviation and high retrieval overhead, hindering their deployment. To address these issues, we propose Retrieval-Augmented Recommendation Explan","authors_text":"Bangcheng Sun, Hui Li, Jilin Yang, Xiaodong Li, Yazhe Chen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2025-07-12T08:15:05Z","title":"Retrieval-Augmented Recommendation Explanation Generation with Hierarchical Aggregation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.09188","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:c03657f056d33cb8fee61bc76c22304559aee713caf31cd169cb0d82215c5453","target":"record","created_at":"2026-07-05T11:36:05Z","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":"7826444fe230fbd27d19944a7935921490be0ba3bd138ca87df12ed372909aaa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2025-07-12T08:15:05Z","title_canon_sha256":"6865221887b01ae5479178262e93611235fefa4a503274c62793b441b5339104"},"schema_version":"1.0","source":{"id":"2507.09188","kind":"arxiv","version":1}},"canonical_sha256":"c1f2203371c6548d9542eaa48f3378db2c1897226d2de746509f6dcf7af8d623","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c1f2203371c6548d9542eaa48f3378db2c1897226d2de746509f6dcf7af8d623","first_computed_at":"2026-07-05T11:36:05.226876Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:36:05.226876Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qbleD/1NzuGi7sKQR29ZAINfzJ2sbvuCKm49DwjCyzx0AYy4EZuEQy8EASlf/YZRSBte3rgFAhWFQOJcUKwqCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:36:05.227334Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.09188","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c03657f056d33cb8fee61bc76c22304559aee713caf31cd169cb0d82215c5453","sha256:fcc69c2c7411c8ad2f9e996d4965a09924118ecb9918acd84258a0be0999494d"],"state_sha256":"1d73aecddc004bcab84a3e57d03d7863b566f8bc0190e1d1e251b395b18bb65d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"srAEvgRpFxLtIznz/SH5LLly2VAYpY4QRhrinSp5M/AESEzZXCrNg3GST176BJqY9i9EnmsxM7l4dv6UTuDGBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T19:18:32.944140Z","bundle_sha256":"2cbbf1ee0da0cf4285b5a5a965f72ab6b709128f9530311c0d9dca8d3f290fa4"}}