{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:7GXYSGPBJT2RREMBUGTRSDOUSZ","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":"8652726481bcada56ca987ba5e73bda6c891d1dd62bdcce50a9a9827244895de","cross_cats_sorted":["cs.AI"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-05-11T22:41:03Z","title_canon_sha256":"7c8444027d34eed02eda7f6f3fd77482c70c8ede8bbb5c559daa756d8bce77b5"},"schema_version":"1.0","source":{"id":"2605.18807","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.18807","created_at":"2026-05-20T00:06:23Z"},{"alias_kind":"arxiv_version","alias_value":"2605.18807v1","created_at":"2026-05-20T00:06:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.18807","created_at":"2026-05-20T00:06:23Z"},{"alias_kind":"pith_short_12","alias_value":"7GXYSGPBJT2R","created_at":"2026-05-20T00:06:23Z"},{"alias_kind":"pith_short_16","alias_value":"7GXYSGPBJT2RREMB","created_at":"2026-05-20T00:06:23Z"},{"alias_kind":"pith_short_8","alias_value":"7GXYSGPB","created_at":"2026-05-20T00:06:23Z"}],"graph_snapshots":[{"event_id":"sha256:d3b961a7fbfeb9ebe94663793799c7f3ac0f3df6c73a1caffa666f1f68d45a0f","target":"graph","created_at":"2026-05-20T00:06:23Z","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/2605.18807/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Encoder-decoder models offer substantial inference-time savings over decoder-only models, but their pretraining objectives suffer from sparse supervision and dynamic sequence lengths, keeping them out of practice at scale. We propose block-based double decoders, a novel transformer architecture that utilizes doubly-causal block-based attention masks to train with full loss supervision and static sequence packing, combining decoder-only training efficiency with encoder-decoder inference efficiency. In scaling law experiments, block-based double decoders strongly outperform encoder-decoders and ","authors_text":"Asher Labovich, Benjamin Bradley, Chaitanya Harsha, Vanessa Alexander","cross_cats":["cs.AI"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-05-11T22:41:03Z","title":"Block-Based Double Decoders"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.18807","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:d6e3c69775babf7ff5add281319d334ae2099f3ffca386adb379a49dc32b5494","target":"record","created_at":"2026-05-20T00:06:23Z","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":"8652726481bcada56ca987ba5e73bda6c891d1dd62bdcce50a9a9827244895de","cross_cats_sorted":["cs.AI"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2026-05-11T22:41:03Z","title_canon_sha256":"7c8444027d34eed02eda7f6f3fd77482c70c8ede8bbb5c559daa756d8bce77b5"},"schema_version":"1.0","source":{"id":"2605.18807","kind":"arxiv","version":1}},"canonical_sha256":"f9af8919e14cf5189181a1a7190dd49677b5e11b558f69ef0a07d719fd2d5084","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f9af8919e14cf5189181a1a7190dd49677b5e11b558f69ef0a07d719fd2d5084","first_computed_at":"2026-05-20T00:06:23.478526Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-20T00:06:23.478526Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"icuFg/uoEgFnFLqFVDKSutysXgJnM2PSQPkN+hR/stL5v/YYh4nMbJWjHl9rLjn8EBgOUc1Cuf4Lqk6hkX1sBw==","signature_status":"signed_v1","signed_at":"2026-05-20T00:06:23.479258Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.18807","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d6e3c69775babf7ff5add281319d334ae2099f3ffca386adb379a49dc32b5494","sha256:d3b961a7fbfeb9ebe94663793799c7f3ac0f3df6c73a1caffa666f1f68d45a0f"],"state_sha256":"5c02c70f5a1df6b12dd605bf977c8f7829f947f4c00e8e3999182f6e85102acb"}