{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:TY4VQ3JI265YAK55QSP76KCFIR","short_pith_number":"pith:TY4VQ3JI","canonical_record":{"source":{"id":"2601.08131","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2026-01-13T01:52:19Z","cross_cats_sorted":[],"title_canon_sha256":"21fa84037b4600935a9ff419d35449c46d338c71641289370aa106835014e23e","abstract_canon_sha256":"48f28e9dc6f9ef60f64dcf51332029e6695905265d72b37e9ab2318b81fc66ab"},"schema_version":"1.0"},"canonical_sha256":"9e39586d28d7bb802bbd849fff2845445d449da100dbf7bc4530354cde39e741","source":{"kind":"arxiv","id":"2601.08131","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2601.08131","created_at":"2026-05-28T01:04:35Z"},{"alias_kind":"arxiv_version","alias_value":"2601.08131v4","created_at":"2026-05-28T01:04:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2601.08131","created_at":"2026-05-28T01:04:35Z"},{"alias_kind":"pith_short_12","alias_value":"TY4VQ3JI265Y","created_at":"2026-05-28T01:04:35Z"},{"alias_kind":"pith_short_16","alias_value":"TY4VQ3JI265YAK55","created_at":"2026-05-28T01:04:35Z"},{"alias_kind":"pith_short_8","alias_value":"TY4VQ3JI","created_at":"2026-05-28T01:04:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:TY4VQ3JI265YAK55QSP76KCFIR","target":"record","payload":{"canonical_record":{"source":{"id":"2601.08131","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2026-01-13T01:52:19Z","cross_cats_sorted":[],"title_canon_sha256":"21fa84037b4600935a9ff419d35449c46d338c71641289370aa106835014e23e","abstract_canon_sha256":"48f28e9dc6f9ef60f64dcf51332029e6695905265d72b37e9ab2318b81fc66ab"},"schema_version":"1.0"},"canonical_sha256":"9e39586d28d7bb802bbd849fff2845445d449da100dbf7bc4530354cde39e741","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-28T01:04:35.236360Z","signature_b64":"eeeHnPaII5qpuPM1pEMZ+Sxh1C16wyTg4V/kL0MhaY8sNklm7JIJ9JCgcwIhPBDaAsNuecGHp8IhvG25R8miCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9e39586d28d7bb802bbd849fff2845445d449da100dbf7bc4530354cde39e741","last_reissued_at":"2026-05-28T01:04:35.235899Z","signature_status":"signed_v1","first_computed_at":"2026-05-28T01:04:35.235899Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2601.08131","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-28T01:04:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L0B2bByTnTUJAcyaHocMkohnIpXMathMOuE6nCaEbuKL2FEkN3cjqszAGD9V4+ibbriI8xiSCZK/joG7yubPBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T15:07:03.575619Z"},"content_sha256":"9c4bc66f8f7f0f134c140bd8771a3fac0279523530986e9598d9feec643aa8a0","schema_version":"1.0","event_id":"sha256:9c4bc66f8f7f0f134c140bd8771a3fac0279523530986e9598d9feec643aa8a0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:TY4VQ3JI265YAK55QSP76KCFIR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Attention Projection Mixing with Exogenous Anchors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CL","authors_text":"Jonathan Su","submitted_at":"2026-01-13T01:52:19Z","abstract_excerpt":"Cross-layer reuse of early attention projections can improve optimization and data efficiency, but it creates a structural conflict: the first layer must simultaneously act as a stable, reusable anchor for all deeper layers and as an effective computational block. We demonstrate that this tension constrains the performance of internal-anchor designs. We propose ExoFormer, which resolves the conflict by learning exogenous anchor projections outside the sequential layer stack. We introduce a unified normalized mixing framework that mixes queries, keys, values, and gate logits using learnable coe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2601.08131","kind":"arxiv","version":4},"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/2601.08131/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":"2026-05-28T01:04:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0mHf6S9mA4K4e26Y4LGKaNg0mNUttG7Pzhc9nHYIhFeZaPxegzPmdaSzLtCwcumL2/t+O9lEMY41IYitB8mfCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T15:07:03.576329Z"},"content_sha256":"f1f245a1b2e8f65f758f717e63b9b20c5e6ec201cc643644c5858e17af876995","schema_version":"1.0","event_id":"sha256:f1f245a1b2e8f65f758f717e63b9b20c5e6ec201cc643644c5858e17af876995"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TY4VQ3JI265YAK55QSP76KCFIR/bundle.json","state_url":"https://pith.science/pith/TY4VQ3JI265YAK55QSP76KCFIR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TY4VQ3JI265YAK55QSP76KCFIR/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":"2026-06-06T15:07:03Z","links":{"resolver":"https://pith.science/pith/TY4VQ3JI265YAK55QSP76KCFIR","bundle":"https://pith.science/pith/TY4VQ3JI265YAK55QSP76KCFIR/bundle.json","state":"https://pith.science/pith/TY4VQ3JI265YAK55QSP76KCFIR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TY4VQ3JI265YAK55QSP76KCFIR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:TY4VQ3JI265YAK55QSP76KCFIR","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":"48f28e9dc6f9ef60f64dcf51332029e6695905265d72b37e9ab2318b81fc66ab","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2026-01-13T01:52:19Z","title_canon_sha256":"21fa84037b4600935a9ff419d35449c46d338c71641289370aa106835014e23e"},"schema_version":"1.0","source":{"id":"2601.08131","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2601.08131","created_at":"2026-05-28T01:04:35Z"},{"alias_kind":"arxiv_version","alias_value":"2601.08131v4","created_at":"2026-05-28T01:04:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2601.08131","created_at":"2026-05-28T01:04:35Z"},{"alias_kind":"pith_short_12","alias_value":"TY4VQ3JI265Y","created_at":"2026-05-28T01:04:35Z"},{"alias_kind":"pith_short_16","alias_value":"TY4VQ3JI265YAK55","created_at":"2026-05-28T01:04:35Z"},{"alias_kind":"pith_short_8","alias_value":"TY4VQ3JI","created_at":"2026-05-28T01:04:35Z"}],"graph_snapshots":[{"event_id":"sha256:f1f245a1b2e8f65f758f717e63b9b20c5e6ec201cc643644c5858e17af876995","target":"graph","created_at":"2026-05-28T01:04:35Z","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/2601.08131/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Cross-layer reuse of early attention projections can improve optimization and data efficiency, but it creates a structural conflict: the first layer must simultaneously act as a stable, reusable anchor for all deeper layers and as an effective computational block. We demonstrate that this tension constrains the performance of internal-anchor designs. We propose ExoFormer, which resolves the conflict by learning exogenous anchor projections outside the sequential layer stack. We introduce a unified normalized mixing framework that mixes queries, keys, values, and gate logits using learnable coe","authors_text":"Jonathan Su","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2026-01-13T01:52:19Z","title":"Attention Projection Mixing with Exogenous Anchors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2601.08131","kind":"arxiv","version":4},"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":"sha256:9c4bc66f8f7f0f134c140bd8771a3fac0279523530986e9598d9feec643aa8a0","target":"record","created_at":"2026-05-28T01:04:35Z","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":"48f28e9dc6f9ef60f64dcf51332029e6695905265d72b37e9ab2318b81fc66ab","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2026-01-13T01:52:19Z","title_canon_sha256":"21fa84037b4600935a9ff419d35449c46d338c71641289370aa106835014e23e"},"schema_version":"1.0","source":{"id":"2601.08131","kind":"arxiv","version":4}},"canonical_sha256":"9e39586d28d7bb802bbd849fff2845445d449da100dbf7bc4530354cde39e741","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9e39586d28d7bb802bbd849fff2845445d449da100dbf7bc4530354cde39e741","first_computed_at":"2026-05-28T01:04:35.235899Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-28T01:04:35.235899Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eeeHnPaII5qpuPM1pEMZ+Sxh1C16wyTg4V/kL0MhaY8sNklm7JIJ9JCgcwIhPBDaAsNuecGHp8IhvG25R8miCA==","signature_status":"signed_v1","signed_at":"2026-05-28T01:04:35.236360Z","signed_message":"canonical_sha256_bytes"},"source_id":"2601.08131","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9c4bc66f8f7f0f134c140bd8771a3fac0279523530986e9598d9feec643aa8a0","sha256:f1f245a1b2e8f65f758f717e63b9b20c5e6ec201cc643644c5858e17af876995"],"state_sha256":"74f72c7e94b0646778135d85ff2a01b534c8b3a9c29d0692860bcb106650ef9e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HLt1Cn2ot2ilO810krTbx/Lds5rFAmDhDZ6InVNXBUcQfhkFhJbGkEpJB3gPgLlek5spH0VNng2IMepA7zN/Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T15:07:03.580577Z","bundle_sha256":"32551c559868a144dd4a1d65fecc96702ce986cffa31145ee26f7a381084b166"}}