{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:4ZCHFOXR6I6RWZHCCE2K3SF4M6","short_pith_number":"pith:4ZCHFOXR","schema_version":"1.0","canonical_sha256":"e64472baf1f23d1b64e21134adc8bc67a6dd1bb94cb98d81882f0f45c37b42fb","source":{"kind":"arxiv","id":"2605.19576","version":1},"attestation_state":"computed","paper":{"title":"Library Drift: Diagnosing and Fixing a Silent Failure Mode in Self-Evolving LLM Skill Libraries","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["cs.CL","cs.SE"],"primary_cat":"cs.AI","authors_text":"Bing Zhu, Guanghui Wang, Peiyang He, Wei Qiu, Xing Zhang, Yanwei Cui, Ziyuan Li","submitted_at":"2026-05-19T09:19:56Z","abstract_excerpt":"Self-evolving skill libraries face a silent failure mode we term \\emph{library drift}: unbounded skill accumulation without outcome-driven lifecycle management causes retrieval degradation, false-positive injections, and performance stagnation. Recent evaluation confirms the symptom--LLM-authored skills deliver +0.0pp gain while human-curated ones deliver +16.2pp (SkillsBench)--yet the underlying mechanism has not been isolated. We provide (1) a reproducible trigger: ablations that isolate drift--one disables skill injection (flat floor, +0.002), one imposes premature retirement (active harm, "},"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":"2605.19576","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.AI","submitted_at":"2026-05-19T09:19:56Z","cross_cats_sorted":["cs.CL","cs.SE"],"title_canon_sha256":"82f8ae74a60a7ac0b3681af552a0890d4817e94eb896167cbbacce66de44ff69","abstract_canon_sha256":"c082f6a33a24338e50303b6bdc510a166cb8712080b9b7c3e9be08f1af3042f3"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-20T01:05:52.549605Z","signature_b64":"o1PiUIAB98VkjxDE9UgoaY9izLgvgz/h5CCXvHn1phQRVOMkayKJsU9yUlOKEcfm/kezHCQfgJQzBLwdFxd2CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e64472baf1f23d1b64e21134adc8bc67a6dd1bb94cb98d81882f0f45c37b42fb","last_reissued_at":"2026-05-20T01:05:52.548864Z","signature_status":"signed_v1","first_computed_at":"2026-05-20T01:05:52.548864Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Library Drift: Diagnosing and Fixing a Silent Failure Mode in Self-Evolving LLM Skill Libraries","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["cs.CL","cs.SE"],"primary_cat":"cs.AI","authors_text":"Bing Zhu, Guanghui Wang, Peiyang He, Wei Qiu, Xing Zhang, Yanwei Cui, Ziyuan Li","submitted_at":"2026-05-19T09:19:56Z","abstract_excerpt":"Self-evolving skill libraries face a silent failure mode we term \\emph{library drift}: unbounded skill accumulation without outcome-driven lifecycle management causes retrieval degradation, false-positive injections, and performance stagnation. Recent evaluation confirms the symptom--LLM-authored skills deliver +0.0pp gain while human-curated ones deliver +16.2pp (SkillsBench)--yet the underlying mechanism has not been isolated. We provide (1) a reproducible trigger: ablations that isolate drift--one disables skill injection (flat floor, +0.002), one imposes premature retirement (active harm, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.19576","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/2605.19576/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":"2605.19576","created_at":"2026-05-20T01:05:52.548970+00:00"},{"alias_kind":"arxiv_version","alias_value":"2605.19576v1","created_at":"2026-05-20T01:05:52.548970+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.19576","created_at":"2026-05-20T01:05:52.548970+00:00"},{"alias_kind":"pith_short_12","alias_value":"4ZCHFOXR6I6R","created_at":"2026-05-20T01:05:52.548970+00:00"},{"alias_kind":"pith_short_16","alias_value":"4ZCHFOXR6I6RWZHC","created_at":"2026-05-20T01:05:52.548970+00:00"},{"alias_kind":"pith_short_8","alias_value":"4ZCHFOXR","created_at":"2026-05-20T01:05:52.548970+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/4ZCHFOXR6I6RWZHCCE2K3SF4M6","json":"https://pith.science/pith/4ZCHFOXR6I6RWZHCCE2K3SF4M6.json","graph_json":"https://pith.science/api/pith-number/4ZCHFOXR6I6RWZHCCE2K3SF4M6/graph.json","events_json":"https://pith.science/api/pith-number/4ZCHFOXR6I6RWZHCCE2K3SF4M6/events.json","paper":"https://pith.science/paper/4ZCHFOXR"},"agent_actions":{"view_html":"https://pith.science/pith/4ZCHFOXR6I6RWZHCCE2K3SF4M6","download_json":"https://pith.science/pith/4ZCHFOXR6I6RWZHCCE2K3SF4M6.json","view_paper":"https://pith.science/paper/4ZCHFOXR","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2605.19576&json=true","fetch_graph":"https://pith.science/api/pith-number/4ZCHFOXR6I6RWZHCCE2K3SF4M6/graph.json","fetch_events":"https://pith.science/api/pith-number/4ZCHFOXR6I6RWZHCCE2K3SF4M6/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4ZCHFOXR6I6RWZHCCE2K3SF4M6/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4ZCHFOXR6I6RWZHCCE2K3SF4M6/action/storage_attestation","attest_author":"https://pith.science/pith/4ZCHFOXR6I6RWZHCCE2K3SF4M6/action/author_attestation","sign_citation":"https://pith.science/pith/4ZCHFOXR6I6RWZHCCE2K3SF4M6/action/citation_signature","submit_replication":"https://pith.science/pith/4ZCHFOXR6I6RWZHCCE2K3SF4M6/action/replication_record"}},"created_at":"2026-05-20T01:05:52.548970+00:00","updated_at":"2026-05-20T01:05:52.548970+00:00"}