{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:EDCUG5WDMQ6FT3BSDTTAHKERKA","short_pith_number":"pith:EDCUG5WD","schema_version":"1.0","canonical_sha256":"20c54376c3643c59ec321ce603a89150351fb210a7930b0092db253a558cf11d","source":{"kind":"arxiv","id":"2605.25848","version":1},"attestation_state":"computed","paper":{"title":"Geometric Evolution Maps: Extracting Stable Concept Probes from Transformer Residual Streams","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.AI"],"primary_cat":"cs.LG","authors_text":"James Henry","submitted_at":"2026-05-25T13:40:15Z","abstract_excerpt":"Concept probes extracted from transformer residual streams are only as reliable as the layer from which they are extracted. The common practice of probing at a fixed late layer or at the peak of a separation score function ignores a fundamental structural feature: concept representations undergo substantial directional rotation during their assembly phase, and do not settle into a stable direction until a characteristic handoff layer after the primary Concept Allocation Zone (CAZ). We introduce Geometric Evolution Maps (GEMs), which track the full directional trajectory of a concept through re"},"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":"2605.25848","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-05-25T13:40:15Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"8da729332d9667fd165febfa0aae2036a0a8cd8ca556f9b50dc2eda174bd4a51","abstract_canon_sha256":"4c916b62953acfd88b670f1d06e19985577aaf7f1b71bea4a8ffcbf3281f3a00"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-26T02:05:15.127533Z","signature_b64":"AMZSeeDdbL75gsjkT7uhFdggXZwCev8YeCXiEry9p5OxeM3goQN1MzL+Yp7dAybn43mI5wC6vgsInwx0xV91Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"20c54376c3643c59ec321ce603a89150351fb210a7930b0092db253a558cf11d","last_reissued_at":"2026-05-26T02:05:15.126800Z","signature_status":"signed_v1","first_computed_at":"2026-05-26T02:05:15.126800Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Geometric Evolution Maps: Extracting Stable Concept Probes from Transformer Residual Streams","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.AI"],"primary_cat":"cs.LG","authors_text":"James Henry","submitted_at":"2026-05-25T13:40:15Z","abstract_excerpt":"Concept probes extracted from transformer residual streams are only as reliable as the layer from which they are extracted. The common practice of probing at a fixed late layer or at the peak of a separation score function ignores a fundamental structural feature: concept representations undergo substantial directional rotation during their assembly phase, and do not settle into a stable direction until a characteristic handoff layer after the primary Concept Allocation Zone (CAZ). We introduce Geometric Evolution Maps (GEMs), which track the full directional trajectory of a concept through re"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.25848","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/2605.25848/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":"2605.25848","created_at":"2026-05-26T02:05:15.126911+00:00"},{"alias_kind":"arxiv_version","alias_value":"2605.25848v1","created_at":"2026-05-26T02:05:15.126911+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.25848","created_at":"2026-05-26T02:05:15.126911+00:00"},{"alias_kind":"pith_short_12","alias_value":"EDCUG5WDMQ6F","created_at":"2026-05-26T02:05:15.126911+00:00"},{"alias_kind":"pith_short_16","alias_value":"EDCUG5WDMQ6FT3BS","created_at":"2026-05-26T02:05:15.126911+00:00"},{"alias_kind":"pith_short_8","alias_value":"EDCUG5WD","created_at":"2026-05-26T02:05:15.126911+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/EDCUG5WDMQ6FT3BSDTTAHKERKA","json":"https://pith.science/pith/EDCUG5WDMQ6FT3BSDTTAHKERKA.json","graph_json":"https://pith.science/api/pith-number/EDCUG5WDMQ6FT3BSDTTAHKERKA/graph.json","events_json":"https://pith.science/api/pith-number/EDCUG5WDMQ6FT3BSDTTAHKERKA/events.json","paper":"https://pith.science/paper/EDCUG5WD"},"agent_actions":{"view_html":"https://pith.science/pith/EDCUG5WDMQ6FT3BSDTTAHKERKA","download_json":"https://pith.science/pith/EDCUG5WDMQ6FT3BSDTTAHKERKA.json","view_paper":"https://pith.science/paper/EDCUG5WD","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2605.25848&json=true","fetch_graph":"https://pith.science/api/pith-number/EDCUG5WDMQ6FT3BSDTTAHKERKA/graph.json","fetch_events":"https://pith.science/api/pith-number/EDCUG5WDMQ6FT3BSDTTAHKERKA/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/EDCUG5WDMQ6FT3BSDTTAHKERKA/action/timestamp_anchor","attest_storage":"https://pith.science/pith/EDCUG5WDMQ6FT3BSDTTAHKERKA/action/storage_attestation","attest_author":"https://pith.science/pith/EDCUG5WDMQ6FT3BSDTTAHKERKA/action/author_attestation","sign_citation":"https://pith.science/pith/EDCUG5WDMQ6FT3BSDTTAHKERKA/action/citation_signature","submit_replication":"https://pith.science/pith/EDCUG5WDMQ6FT3BSDTTAHKERKA/action/replication_record"}},"created_at":"2026-05-26T02:05:15.126911+00:00","updated_at":"2026-05-26T02:05:15.126911+00:00"}