{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:2E6UFUJWKP3LWVSQQJCSRVRQ5Y","short_pith_number":"pith:2E6UFUJW","canonical_record":{"source":{"id":"2309.00166","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2023-08-31T23:05:16Z","cross_cats_sorted":["cs.DC","cs.PF"],"title_canon_sha256":"9fe39b449835f3d66bd40862cac37898f199701b5ef4f4468e29fd7cf692b6cd","abstract_canon_sha256":"c3edd4ef5a417e6652aac5ad7a26d0aa1732498a52c0c235485fad20de8cc6fa"},"schema_version":"1.0"},"canonical_sha256":"d13d42d13653f6bb5650824528d630ee2899bd85d1031a2155d840d82b3d10b6","source":{"kind":"arxiv","id":"2309.00166","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2309.00166","created_at":"2026-07-05T06:46:53Z"},{"alias_kind":"arxiv_version","alias_value":"2309.00166v1","created_at":"2026-07-05T06:46:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2309.00166","created_at":"2026-07-05T06:46:53Z"},{"alias_kind":"pith_short_12","alias_value":"2E6UFUJWKP3L","created_at":"2026-07-05T06:46:53Z"},{"alias_kind":"pith_short_16","alias_value":"2E6UFUJWKP3LWVSQ","created_at":"2026-07-05T06:46:53Z"},{"alias_kind":"pith_short_8","alias_value":"2E6UFUJW","created_at":"2026-07-05T06:46:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:2E6UFUJWKP3LWVSQQJCSRVRQ5Y","target":"record","payload":{"canonical_record":{"source":{"id":"2309.00166","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2023-08-31T23:05:16Z","cross_cats_sorted":["cs.DC","cs.PF"],"title_canon_sha256":"9fe39b449835f3d66bd40862cac37898f199701b5ef4f4468e29fd7cf692b6cd","abstract_canon_sha256":"c3edd4ef5a417e6652aac5ad7a26d0aa1732498a52c0c235485fad20de8cc6fa"},"schema_version":"1.0"},"canonical_sha256":"d13d42d13653f6bb5650824528d630ee2899bd85d1031a2155d840d82b3d10b6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:46:53.199601Z","signature_b64":"KP4EAgc+nj9n/DaypIbDBG3+hlCuHliPGXHB1Uq6qdVQOlE67KxMi8jG3TuhVCzmJDybTx5pWnbI3mkh8serCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d13d42d13653f6bb5650824528d630ee2899bd85d1031a2155d840d82b3d10b6","last_reissued_at":"2026-07-05T06:46:53.199129Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:46:53.199129Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2309.00166","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":"2026-07-05T06:46:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2+Q02jFvodztaE/UxzeSjrc/7BRn/mzVhNP9fZUbw2CijoRbp7G+8ODFxdYw+IO0hGoq/q2Uosz+MSKkC8zZBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T12:28:47.648769Z"},"content_sha256":"5b567787146de0f66c7ee4a16f313ae0687150ca66e483b2a8d8d026ef17442a","schema_version":"1.0","event_id":"sha256:5b567787146de0f66c7ee4a16f313ae0687150ca66e483b2a8d8d026ef17442a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:2E6UFUJWKP3LWVSQQJCSRVRQ5Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Charliecloud's layer-free, Git-based container build cache","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.DC","cs.PF"],"primary_cat":"cs.SE","authors_text":"2), (2) University of North Carolina Wilmington, 3), (3) Colorado State University, 4), (4) University of Texas at Austin), Ashlyn Lee (1, Benjamin Stormer (1, Claude H. (Rusty) Davis IV (1), Jordan Ogas (1), Reid Priedhorsky (1), R. Shane Goff (1) ((1) Los Alamos National Laboratory, Z. Noah Hounshel (1","submitted_at":"2023-08-31T23:05:16Z","abstract_excerpt":"A popular approach to deploying scientific applications in high performance computing (HPC) is Linux containers, which package an application and all its dependencies as a single unit. This image is built by interpreting instructions in a machine-readable recipe, which is faster with a build cache that stores instruction results for re-use. The standard approach (used e.g. by Docker and Podman) is a many-layered union filesystem, encoding differences between layers as tar archives.\n  Our experiments show this performs similarly to layered caches on both build time and disk usage, with a consid"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2309.00166","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/2309.00166/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":"2026-07-05T06:46:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vt3IKib5kx28oKIbSzrqpQ1YF4Ys5XnySNZbk7mUqoEfIuNudsYgybexoHiCrSUoi9d7BYxyvU+Gb5wf5MXuCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T12:28:47.649142Z"},"content_sha256":"043baa5408be36921a3d26d1a45c9469a5ad4954a7d98d0da241be0feadab191","schema_version":"1.0","event_id":"sha256:043baa5408be36921a3d26d1a45c9469a5ad4954a7d98d0da241be0feadab191"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2E6UFUJWKP3LWVSQQJCSRVRQ5Y/bundle.json","state_url":"https://pith.science/pith/2E6UFUJWKP3LWVSQQJCSRVRQ5Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2E6UFUJWKP3LWVSQQJCSRVRQ5Y/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":"2026-07-07T12:28:47Z","links":{"resolver":"https://pith.science/pith/2E6UFUJWKP3LWVSQQJCSRVRQ5Y","bundle":"https://pith.science/pith/2E6UFUJWKP3LWVSQQJCSRVRQ5Y/bundle.json","state":"https://pith.science/pith/2E6UFUJWKP3LWVSQQJCSRVRQ5Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2E6UFUJWKP3LWVSQQJCSRVRQ5Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:2E6UFUJWKP3LWVSQQJCSRVRQ5Y","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":"c3edd4ef5a417e6652aac5ad7a26d0aa1732498a52c0c235485fad20de8cc6fa","cross_cats_sorted":["cs.DC","cs.PF"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2023-08-31T23:05:16Z","title_canon_sha256":"9fe39b449835f3d66bd40862cac37898f199701b5ef4f4468e29fd7cf692b6cd"},"schema_version":"1.0","source":{"id":"2309.00166","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2309.00166","created_at":"2026-07-05T06:46:53Z"},{"alias_kind":"arxiv_version","alias_value":"2309.00166v1","created_at":"2026-07-05T06:46:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2309.00166","created_at":"2026-07-05T06:46:53Z"},{"alias_kind":"pith_short_12","alias_value":"2E6UFUJWKP3L","created_at":"2026-07-05T06:46:53Z"},{"alias_kind":"pith_short_16","alias_value":"2E6UFUJWKP3LWVSQ","created_at":"2026-07-05T06:46:53Z"},{"alias_kind":"pith_short_8","alias_value":"2E6UFUJW","created_at":"2026-07-05T06:46:53Z"}],"graph_snapshots":[{"event_id":"sha256:043baa5408be36921a3d26d1a45c9469a5ad4954a7d98d0da241be0feadab191","target":"graph","created_at":"2026-07-05T06:46:53Z","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/2309.00166/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A popular approach to deploying scientific applications in high performance computing (HPC) is Linux containers, which package an application and all its dependencies as a single unit. This image is built by interpreting instructions in a machine-readable recipe, which is faster with a build cache that stores instruction results for re-use. The standard approach (used e.g. by Docker and Podman) is a many-layered union filesystem, encoding differences between layers as tar archives.\n  Our experiments show this performs similarly to layered caches on both build time and disk usage, with a consid","authors_text":"2), (2) University of North Carolina Wilmington, 3), (3) Colorado State University, 4), (4) University of Texas at Austin), Ashlyn Lee (1, Benjamin Stormer (1, Claude H. (Rusty) Davis IV (1), Jordan Ogas (1), Reid Priedhorsky (1), R. Shane Goff (1) ((1) Los Alamos National Laboratory, Z. Noah Hounshel (1","cross_cats":["cs.DC","cs.PF"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2023-08-31T23:05:16Z","title":"Charliecloud's layer-free, Git-based container build cache"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2309.00166","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":"sha256:5b567787146de0f66c7ee4a16f313ae0687150ca66e483b2a8d8d026ef17442a","target":"record","created_at":"2026-07-05T06:46:53Z","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":"c3edd4ef5a417e6652aac5ad7a26d0aa1732498a52c0c235485fad20de8cc6fa","cross_cats_sorted":["cs.DC","cs.PF"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2023-08-31T23:05:16Z","title_canon_sha256":"9fe39b449835f3d66bd40862cac37898f199701b5ef4f4468e29fd7cf692b6cd"},"schema_version":"1.0","source":{"id":"2309.00166","kind":"arxiv","version":1}},"canonical_sha256":"d13d42d13653f6bb5650824528d630ee2899bd85d1031a2155d840d82b3d10b6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d13d42d13653f6bb5650824528d630ee2899bd85d1031a2155d840d82b3d10b6","first_computed_at":"2026-07-05T06:46:53.199129Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:46:53.199129Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KP4EAgc+nj9n/DaypIbDBG3+hlCuHliPGXHB1Uq6qdVQOlE67KxMi8jG3TuhVCzmJDybTx5pWnbI3mkh8serCA==","signature_status":"signed_v1","signed_at":"2026-07-05T06:46:53.199601Z","signed_message":"canonical_sha256_bytes"},"source_id":"2309.00166","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5b567787146de0f66c7ee4a16f313ae0687150ca66e483b2a8d8d026ef17442a","sha256:043baa5408be36921a3d26d1a45c9469a5ad4954a7d98d0da241be0feadab191"],"state_sha256":"99610794fbfaba4c8de5a297761a383597c095bc2b4278133e349c46451e3a3a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"za7/zmr3vvSOcpBOeLc+gYjc9wCBy6wdn19xaqAUlv2ItXpCZNR3Z8lMAv9X+DHv5tV50bHxABeaBd/c7XtPDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T12:28:47.651093Z","bundle_sha256":"ca717fc76575e93135187e6fe8147cb1466c40a86374bc2746404a835882567f"}}