{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:SUPVQQ2KYONVGFGQ6MLFLJJD7U","short_pith_number":"pith:SUPVQQ2K","canonical_record":{"source":{"id":"2605.24856","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-05-24T04:25:32Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"db44ebb9c165a768ecdcc91b5d78cb1342f958347718daf02d1b1517a85c22f9","abstract_canon_sha256":"7be147e544002aee19f9f5d7cc690efc574e374df8b12596db29b390b43a78f3"},"schema_version":"1.0"},"canonical_sha256":"951f58434ac39b5314d0f31655a523fd0223810d49f77ceed0508b24379b8cc5","source":{"kind":"arxiv","id":"2605.24856","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.24856","created_at":"2026-05-26T01:04:01Z"},{"alias_kind":"arxiv_version","alias_value":"2605.24856v1","created_at":"2026-05-26T01:04:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.24856","created_at":"2026-05-26T01:04:01Z"},{"alias_kind":"pith_short_12","alias_value":"SUPVQQ2KYONV","created_at":"2026-05-26T01:04:01Z"},{"alias_kind":"pith_short_16","alias_value":"SUPVQQ2KYONVGFGQ","created_at":"2026-05-26T01:04:01Z"},{"alias_kind":"pith_short_8","alias_value":"SUPVQQ2K","created_at":"2026-05-26T01:04:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:SUPVQQ2KYONVGFGQ6MLFLJJD7U","target":"record","payload":{"canonical_record":{"source":{"id":"2605.24856","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-05-24T04:25:32Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"db44ebb9c165a768ecdcc91b5d78cb1342f958347718daf02d1b1517a85c22f9","abstract_canon_sha256":"7be147e544002aee19f9f5d7cc690efc574e374df8b12596db29b390b43a78f3"},"schema_version":"1.0"},"canonical_sha256":"951f58434ac39b5314d0f31655a523fd0223810d49f77ceed0508b24379b8cc5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-26T01:04:01.904724Z","signature_b64":"4MYUa0DAAgjys/J1eavY685vwtLtT67Wx+0D8h9FrOsqkKpQKQaoVBHWa3fQ8z5aOGlKikhm0F9Qb8cbNhuSAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"951f58434ac39b5314d0f31655a523fd0223810d49f77ceed0508b24379b8cc5","last_reissued_at":"2026-05-26T01:04:01.903850Z","signature_status":"signed_v1","first_computed_at":"2026-05-26T01:04:01.903850Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2605.24856","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":"2026-05-26T01:04:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CflQpVc5IehN98En/8DANrWag45dGR7djfXiN+PiQAVH4hHM8UTtdaydeXCLosYcfDDFFJrksIIIcHR0gVmVCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-30T20:18:46.185012Z"},"content_sha256":"0449a0006c4730a785613306588d54c6bf14867fad842a13047a719c7997cbb5","schema_version":"1.0","event_id":"sha256:0449a0006c4730a785613306588d54c6bf14867fad842a13047a719c7997cbb5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:SUPVQQ2KYONVGFGQ6MLFLJJD7U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Concept Allocation Zone: Tracking How Concepts Form Across Transformer Depth","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.AI"],"primary_cat":"cs.LG","authors_text":"James Henry","submitted_at":"2026-05-24T04:25:32Z","abstract_excerpt":"Concept formation in transformer language models is depth-extended, not a single-layer event: concepts emerge gradually across a contiguous region of the residual stream. Mechanistic interpretability methods identify the single layer of peak class separation -- the \"best layer\" -- capturing a snapshot rather than the process itself. We introduce the Concept Allocation Zone (CAZ): the depth interval within which a concept becomes measurably separable, the region allocated to its geometric expression. We formalize the CAZ through three layer-wise metrics (Separation, Concept Coherence, Concept V"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.24856","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/2605.24856/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":"2026-05-26T01:04:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rkRy9pm9sbay4Oe5sR8n9mMd4wbktfISuxkVE6FjrC/NUPBk4pAZZJJTDtCAObGYVILcL/W6ots3EiU6q0DgDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-30T20:18:46.185682Z"},"content_sha256":"ff09e2abf3c16ad40a0f8b83c782690d7fe3208b2fe245c713cb8ae366ab64ef","schema_version":"1.0","event_id":"sha256:ff09e2abf3c16ad40a0f8b83c782690d7fe3208b2fe245c713cb8ae366ab64ef"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SUPVQQ2KYONVGFGQ6MLFLJJD7U/bundle.json","state_url":"https://pith.science/pith/SUPVQQ2KYONVGFGQ6MLFLJJD7U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SUPVQQ2KYONVGFGQ6MLFLJJD7U/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":"2026-06-30T20:18:46Z","links":{"resolver":"https://pith.science/pith/SUPVQQ2KYONVGFGQ6MLFLJJD7U","bundle":"https://pith.science/pith/SUPVQQ2KYONVGFGQ6MLFLJJD7U/bundle.json","state":"https://pith.science/pith/SUPVQQ2KYONVGFGQ6MLFLJJD7U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SUPVQQ2KYONVGFGQ6MLFLJJD7U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:SUPVQQ2KYONVGFGQ6MLFLJJD7U","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":"7be147e544002aee19f9f5d7cc690efc574e374df8b12596db29b390b43a78f3","cross_cats_sorted":["cs.AI"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-05-24T04:25:32Z","title_canon_sha256":"db44ebb9c165a768ecdcc91b5d78cb1342f958347718daf02d1b1517a85c22f9"},"schema_version":"1.0","source":{"id":"2605.24856","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.24856","created_at":"2026-05-26T01:04:01Z"},{"alias_kind":"arxiv_version","alias_value":"2605.24856v1","created_at":"2026-05-26T01:04:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.24856","created_at":"2026-05-26T01:04:01Z"},{"alias_kind":"pith_short_12","alias_value":"SUPVQQ2KYONV","created_at":"2026-05-26T01:04:01Z"},{"alias_kind":"pith_short_16","alias_value":"SUPVQQ2KYONVGFGQ","created_at":"2026-05-26T01:04:01Z"},{"alias_kind":"pith_short_8","alias_value":"SUPVQQ2K","created_at":"2026-05-26T01:04:01Z"}],"graph_snapshots":[{"event_id":"sha256:ff09e2abf3c16ad40a0f8b83c782690d7fe3208b2fe245c713cb8ae366ab64ef","target":"graph","created_at":"2026-05-26T01:04:01Z","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/2605.24856/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Concept formation in transformer language models is depth-extended, not a single-layer event: concepts emerge gradually across a contiguous region of the residual stream. Mechanistic interpretability methods identify the single layer of peak class separation -- the \"best layer\" -- capturing a snapshot rather than the process itself. We introduce the Concept Allocation Zone (CAZ): the depth interval within which a concept becomes measurably separable, the region allocated to its geometric expression. We formalize the CAZ through three layer-wise metrics (Separation, Concept Coherence, Concept V","authors_text":"James Henry","cross_cats":["cs.AI"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-05-24T04:25:32Z","title":"The Concept Allocation Zone: Tracking How Concepts Form Across Transformer Depth"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.24856","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":"sha256:0449a0006c4730a785613306588d54c6bf14867fad842a13047a719c7997cbb5","target":"record","created_at":"2026-05-26T01:04:01Z","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":"7be147e544002aee19f9f5d7cc690efc574e374df8b12596db29b390b43a78f3","cross_cats_sorted":["cs.AI"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-05-24T04:25:32Z","title_canon_sha256":"db44ebb9c165a768ecdcc91b5d78cb1342f958347718daf02d1b1517a85c22f9"},"schema_version":"1.0","source":{"id":"2605.24856","kind":"arxiv","version":1}},"canonical_sha256":"951f58434ac39b5314d0f31655a523fd0223810d49f77ceed0508b24379b8cc5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"951f58434ac39b5314d0f31655a523fd0223810d49f77ceed0508b24379b8cc5","first_computed_at":"2026-05-26T01:04:01.903850Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-26T01:04:01.903850Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4MYUa0DAAgjys/J1eavY685vwtLtT67Wx+0D8h9FrOsqkKpQKQaoVBHWa3fQ8z5aOGlKikhm0F9Qb8cbNhuSAw==","signature_status":"signed_v1","signed_at":"2026-05-26T01:04:01.904724Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.24856","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0449a0006c4730a785613306588d54c6bf14867fad842a13047a719c7997cbb5","sha256:ff09e2abf3c16ad40a0f8b83c782690d7fe3208b2fe245c713cb8ae366ab64ef"],"state_sha256":"cc03c86f0cf9e87cb93569d5625250d55598c43c2273b894f8a55145913ff4b1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+92NwsVsCI0o4lmqYnuMRc/OXgf/akFMiUaLQJYcqN3P8Rg25TFp/SIxg5E/SRv04EksTc/1vg84+t9XsJglBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-30T20:18:46.188801Z","bundle_sha256":"f9d317bd0618dd7817b94289d21fcd5408ded2b5abb027b237880151c17bc438"}}