{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:KZ5TAGFTJ76BISIEBXZPYJCK3K","short_pith_number":"pith:KZ5TAGFT","canonical_record":{"source":{"id":"2606.30911","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.AI","submitted_at":"2026-06-29T20:59:14Z","cross_cats_sorted":["cs.LG","cs.MA"],"title_canon_sha256":"4a4bf570d1cdeba7e17066d450d052384603512fcbfe19bd03f84de546a452eb","abstract_canon_sha256":"1a2f4d705534f5fc3d770f7718197fafc8b1b1d4782d5c0a76ab8c1a62fdde61"},"schema_version":"1.0"},"canonical_sha256":"567b3018b34ffc1449040df2fc244ada84f18654df6252ce84fcb1eeb31d13de","source":{"kind":"arxiv","id":"2606.30911","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.30911","created_at":"2026-07-01T00:17:21Z"},{"alias_kind":"arxiv_version","alias_value":"2606.30911v1","created_at":"2026-07-01T00:17:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.30911","created_at":"2026-07-01T00:17:21Z"},{"alias_kind":"pith_short_12","alias_value":"KZ5TAGFTJ76B","created_at":"2026-07-01T00:17:21Z"},{"alias_kind":"pith_short_16","alias_value":"KZ5TAGFTJ76BISIE","created_at":"2026-07-01T00:17:21Z"},{"alias_kind":"pith_short_8","alias_value":"KZ5TAGFT","created_at":"2026-07-01T00:17:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:KZ5TAGFTJ76BISIEBXZPYJCK3K","target":"record","payload":{"canonical_record":{"source":{"id":"2606.30911","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.AI","submitted_at":"2026-06-29T20:59:14Z","cross_cats_sorted":["cs.LG","cs.MA"],"title_canon_sha256":"4a4bf570d1cdeba7e17066d450d052384603512fcbfe19bd03f84de546a452eb","abstract_canon_sha256":"1a2f4d705534f5fc3d770f7718197fafc8b1b1d4782d5c0a76ab8c1a62fdde61"},"schema_version":"1.0"},"canonical_sha256":"567b3018b34ffc1449040df2fc244ada84f18654df6252ce84fcb1eeb31d13de","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-01T00:17:21.401069Z","signature_b64":"BCmJLGibREWy9QAJxS/N7bWZBZFs7QtsZhCPD+KOSar2W5UqMRd2nfCHLGw9YR1UifZw9zjZSp/NDlEfYCWICA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"567b3018b34ffc1449040df2fc244ada84f18654df6252ce84fcb1eeb31d13de","last_reissued_at":"2026-07-01T00:17:21.400539Z","signature_status":"signed_v1","first_computed_at":"2026-07-01T00:17:21.400539Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.30911","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":"2026-07-01T00:17:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"npWXya0YCf5gHe+GfYfF1AZAiDRD8O+iNEKXnuYkWZOylpGv08SjKyOxujDvghd3x3egOfi6eVArZkk0FiSMAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-03T00:56:31.747646Z"},"content_sha256":"7ad3e05cabc767a0f2344f8f1bf1170f55979910d8694ea2a4ad900d2eaa846a","schema_version":"1.0","event_id":"sha256:7ad3e05cabc767a0f2344f8f1bf1170f55979910d8694ea2a4ad900d2eaa846a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:KZ5TAGFTJ76BISIEBXZPYJCK3K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Why Solve It Twice? Hierarchical Accumulation of Skills for Transfer-Efficient ML Engineering","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.LG","cs.MA"],"primary_cat":"cs.AI","authors_text":"Osmar R. Zaiane, Yashar Talebirad, Yongbin Kim","submitted_at":"2026-06-29T20:59:14Z","abstract_excerpt":"ML engineering agents waste compute rediscovering known techniques because every competition is a cold start. We present HASTE, a hierarchical multi-agent system that organizes cross-competition knowledge into three scope tiers (global, domain, and competition-specific), each coupled to a matching agent level. An orchestrator coordinates domain specialists and promotes learning between tiers via LLM-driven abstraction. A controlled ablation provides evidence for scoped loading: holding a 159-skill inventory constant across 8 competitions, tiered loading achieves a 100% medal rate while flat lo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.30911","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/2606.30911/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":"2026-07-01T00:17:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n1M3QytQEGJ/Z6pf7JEEQA8wDllBIy6oiJVR5kYXGNzN2YOZ9Cc9SIi+wFrxmk+TB2lCiBlOR3L9o+i1D7zVBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-03T00:56:31.748015Z"},"content_sha256":"180bb723d65a2bcd87ff55e95486b87e34d132768ba2ce9e0bd485253c209818","schema_version":"1.0","event_id":"sha256:180bb723d65a2bcd87ff55e95486b87e34d132768ba2ce9e0bd485253c209818"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KZ5TAGFTJ76BISIEBXZPYJCK3K/bundle.json","state_url":"https://pith.science/pith/KZ5TAGFTJ76BISIEBXZPYJCK3K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KZ5TAGFTJ76BISIEBXZPYJCK3K/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":"2026-07-03T00:56:31Z","links":{"resolver":"https://pith.science/pith/KZ5TAGFTJ76BISIEBXZPYJCK3K","bundle":"https://pith.science/pith/KZ5TAGFTJ76BISIEBXZPYJCK3K/bundle.json","state":"https://pith.science/pith/KZ5TAGFTJ76BISIEBXZPYJCK3K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KZ5TAGFTJ76BISIEBXZPYJCK3K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:KZ5TAGFTJ76BISIEBXZPYJCK3K","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":"1a2f4d705534f5fc3d770f7718197fafc8b1b1d4782d5c0a76ab8c1a62fdde61","cross_cats_sorted":["cs.LG","cs.MA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.AI","submitted_at":"2026-06-29T20:59:14Z","title_canon_sha256":"4a4bf570d1cdeba7e17066d450d052384603512fcbfe19bd03f84de546a452eb"},"schema_version":"1.0","source":{"id":"2606.30911","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.30911","created_at":"2026-07-01T00:17:21Z"},{"alias_kind":"arxiv_version","alias_value":"2606.30911v1","created_at":"2026-07-01T00:17:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.30911","created_at":"2026-07-01T00:17:21Z"},{"alias_kind":"pith_short_12","alias_value":"KZ5TAGFTJ76B","created_at":"2026-07-01T00:17:21Z"},{"alias_kind":"pith_short_16","alias_value":"KZ5TAGFTJ76BISIE","created_at":"2026-07-01T00:17:21Z"},{"alias_kind":"pith_short_8","alias_value":"KZ5TAGFT","created_at":"2026-07-01T00:17:21Z"}],"graph_snapshots":[{"event_id":"sha256:180bb723d65a2bcd87ff55e95486b87e34d132768ba2ce9e0bd485253c209818","target":"graph","created_at":"2026-07-01T00:17:21Z","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/2606.30911/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"ML engineering agents waste compute rediscovering known techniques because every competition is a cold start. We present HASTE, a hierarchical multi-agent system that organizes cross-competition knowledge into three scope tiers (global, domain, and competition-specific), each coupled to a matching agent level. An orchestrator coordinates domain specialists and promotes learning between tiers via LLM-driven abstraction. A controlled ablation provides evidence for scoped loading: holding a 159-skill inventory constant across 8 competitions, tiered loading achieves a 100% medal rate while flat lo","authors_text":"Osmar R. Zaiane, Yashar Talebirad, Yongbin Kim","cross_cats":["cs.LG","cs.MA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.AI","submitted_at":"2026-06-29T20:59:14Z","title":"Why Solve It Twice? Hierarchical Accumulation of Skills for Transfer-Efficient ML Engineering"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.30911","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":"sha256:7ad3e05cabc767a0f2344f8f1bf1170f55979910d8694ea2a4ad900d2eaa846a","target":"record","created_at":"2026-07-01T00:17:21Z","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":"1a2f4d705534f5fc3d770f7718197fafc8b1b1d4782d5c0a76ab8c1a62fdde61","cross_cats_sorted":["cs.LG","cs.MA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.AI","submitted_at":"2026-06-29T20:59:14Z","title_canon_sha256":"4a4bf570d1cdeba7e17066d450d052384603512fcbfe19bd03f84de546a452eb"},"schema_version":"1.0","source":{"id":"2606.30911","kind":"arxiv","version":1}},"canonical_sha256":"567b3018b34ffc1449040df2fc244ada84f18654df6252ce84fcb1eeb31d13de","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"567b3018b34ffc1449040df2fc244ada84f18654df6252ce84fcb1eeb31d13de","first_computed_at":"2026-07-01T00:17:21.400539Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-01T00:17:21.400539Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BCmJLGibREWy9QAJxS/N7bWZBZFs7QtsZhCPD+KOSar2W5UqMRd2nfCHLGw9YR1UifZw9zjZSp/NDlEfYCWICA==","signature_status":"signed_v1","signed_at":"2026-07-01T00:17:21.401069Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.30911","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7ad3e05cabc767a0f2344f8f1bf1170f55979910d8694ea2a4ad900d2eaa846a","sha256:180bb723d65a2bcd87ff55e95486b87e34d132768ba2ce9e0bd485253c209818"],"state_sha256":"eaf6af73e90ff9cc0628f1d37e2d65c26919600fdff1827b31eb399f0e9dfa91"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WSbBXeP7tFCHZtUgFl0VU9gcynps2/81manwBhBIgQVvKM7Yy3CU93IgZBB+3WYwlcYfxRY/WHECM61xs6uqBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-03T00:56:31.750017Z","bundle_sha256":"f3d1b23ce74a49b3ba733328d76b25127e3248fc3d5caa0907487e89d0dd5935"}}