{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:6WMHBLZQWHF4DEPB7YMEYDZNMQ","short_pith_number":"pith:6WMHBLZQ","canonical_record":{"source":{"id":"2607.15714","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.RO","submitted_at":"2026-07-17T07:51:03Z","cross_cats_sorted":[],"title_canon_sha256":"91e1f6018cfa63f1e1208e7f96f4e838bbea02db34cf37853144d436374fc07e","abstract_canon_sha256":"b1f859cb648165aa16b76d5ea84e58a2aab2c9df258219bb8e9dc89bda606f1a"},"schema_version":"1.0"},"canonical_sha256":"f59870af30b1cbc191e1fe184c0f2d641471cda42510672152d85a8784710289","source":{"kind":"arxiv","id":"2607.15714","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.15714","created_at":"2026-07-20T01:19:05Z"},{"alias_kind":"arxiv_version","alias_value":"2607.15714v1","created_at":"2026-07-20T01:19:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.15714","created_at":"2026-07-20T01:19:05Z"},{"alias_kind":"pith_short_12","alias_value":"6WMHBLZQWHF4","created_at":"2026-07-20T01:19:05Z"},{"alias_kind":"pith_short_16","alias_value":"6WMHBLZQWHF4DEPB","created_at":"2026-07-20T01:19:05Z"},{"alias_kind":"pith_short_8","alias_value":"6WMHBLZQ","created_at":"2026-07-20T01:19:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:6WMHBLZQWHF4DEPB7YMEYDZNMQ","target":"record","payload":{"canonical_record":{"source":{"id":"2607.15714","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.RO","submitted_at":"2026-07-17T07:51:03Z","cross_cats_sorted":[],"title_canon_sha256":"91e1f6018cfa63f1e1208e7f96f4e838bbea02db34cf37853144d436374fc07e","abstract_canon_sha256":"b1f859cb648165aa16b76d5ea84e58a2aab2c9df258219bb8e9dc89bda606f1a"},"schema_version":"1.0"},"canonical_sha256":"f59870af30b1cbc191e1fe184c0f2d641471cda42510672152d85a8784710289","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-20T01:19:05.840384Z","signature_b64":"H1JiFUBXMwmbnqCDgbofhP2AXuKQ5NPujCeHUt1e3UAdYAjiw1jfoxVjKLWxjVU1Xrwm1SWX99Q6V/mo90uGAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f59870af30b1cbc191e1fe184c0f2d641471cda42510672152d85a8784710289","last_reissued_at":"2026-07-20T01:19:05.839537Z","signature_status":"signed_v1","first_computed_at":"2026-07-20T01:19:05.839537Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.15714","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":"2026-07-20T01:19:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+1gwKrWSbv6APtM2htUWIq+UKcAwqyrD+Tk1NE69TopX4FxEJzXqMDNQcVvBCFJBbfwqIBRxAGUcKv7IzNcCCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-02T23:31:13.609128Z"},"content_sha256":"c07a4ae352370c849a45b980905b1a2e27a15481e800679ce8c615332603ed12","schema_version":"1.0","event_id":"sha256:c07a4ae352370c849a45b980905b1a2e27a15481e800679ce8c615332603ed12"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:6WMHBLZQWHF4DEPB7YMEYDZNMQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"AC-VLA: Robust Out-of-Distribution Action Execution via Compositional Learning","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.RO","authors_text":"Jie Lu, Kai Peng, Xiaobo Wang, Xiaojiang Peng, Zheng Lian, Zitong Yu","submitted_at":"2026-07-17T07:51:03Z","abstract_excerpt":"Vision-Language-Action (VLA) models excel at end-to-end robotic manipulation but struggle with out-of-distribution (OOD) generalization when familiar sub-tasks are recombined in unseen configurations. We identify two mutually reinforcing failure modes: \\emph{trajectory overfitting}, where models overfit to holistic trajectory patterns rather than compositional sub-skill semantics; and \\emph{perceptual shortcut}, where action tokens over-rely on wrist-view textures at the expense of global spatial grounding. To address both, we introduce \\textbf{AC-VLA}, a plug-and-play Action Compositional lea"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.15714","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/2607.15714/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":"2026-07-20T01:19:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LOZPCpGPdLnh05pGxDfyJcF+P/FZRiLjwa0t/9guYI6PFuCmZTFel8jnBhJJk+SBb3qUJ9GRdYRc4vrh8b8ACA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-02T23:31:13.609665Z"},"content_sha256":"ea81b00741dd576629087fa738431ca03477afcf2fbb13290f7987f3f5e49972","schema_version":"1.0","event_id":"sha256:ea81b00741dd576629087fa738431ca03477afcf2fbb13290f7987f3f5e49972"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6WMHBLZQWHF4DEPB7YMEYDZNMQ/bundle.json","state_url":"https://pith.science/pith/6WMHBLZQWHF4DEPB7YMEYDZNMQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6WMHBLZQWHF4DEPB7YMEYDZNMQ/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":"2026-08-02T23:31:13Z","links":{"resolver":"https://pith.science/pith/6WMHBLZQWHF4DEPB7YMEYDZNMQ","bundle":"https://pith.science/pith/6WMHBLZQWHF4DEPB7YMEYDZNMQ/bundle.json","state":"https://pith.science/pith/6WMHBLZQWHF4DEPB7YMEYDZNMQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6WMHBLZQWHF4DEPB7YMEYDZNMQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:6WMHBLZQWHF4DEPB7YMEYDZNMQ","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":"b1f859cb648165aa16b76d5ea84e58a2aab2c9df258219bb8e9dc89bda606f1a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.RO","submitted_at":"2026-07-17T07:51:03Z","title_canon_sha256":"91e1f6018cfa63f1e1208e7f96f4e838bbea02db34cf37853144d436374fc07e"},"schema_version":"1.0","source":{"id":"2607.15714","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.15714","created_at":"2026-07-20T01:19:05Z"},{"alias_kind":"arxiv_version","alias_value":"2607.15714v1","created_at":"2026-07-20T01:19:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.15714","created_at":"2026-07-20T01:19:05Z"},{"alias_kind":"pith_short_12","alias_value":"6WMHBLZQWHF4","created_at":"2026-07-20T01:19:05Z"},{"alias_kind":"pith_short_16","alias_value":"6WMHBLZQWHF4DEPB","created_at":"2026-07-20T01:19:05Z"},{"alias_kind":"pith_short_8","alias_value":"6WMHBLZQ","created_at":"2026-07-20T01:19:05Z"}],"graph_snapshots":[{"event_id":"sha256:ea81b00741dd576629087fa738431ca03477afcf2fbb13290f7987f3f5e49972","target":"graph","created_at":"2026-07-20T01:19:05Z","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/2607.15714/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Vision-Language-Action (VLA) models excel at end-to-end robotic manipulation but struggle with out-of-distribution (OOD) generalization when familiar sub-tasks are recombined in unseen configurations. We identify two mutually reinforcing failure modes: \\emph{trajectory overfitting}, where models overfit to holistic trajectory patterns rather than compositional sub-skill semantics; and \\emph{perceptual shortcut}, where action tokens over-rely on wrist-view textures at the expense of global spatial grounding. To address both, we introduce \\textbf{AC-VLA}, a plug-and-play Action Compositional lea","authors_text":"Jie Lu, Kai Peng, Xiaobo Wang, Xiaojiang Peng, Zheng Lian, Zitong Yu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.RO","submitted_at":"2026-07-17T07:51:03Z","title":"AC-VLA: Robust Out-of-Distribution Action Execution via Compositional Learning"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.15714","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:c07a4ae352370c849a45b980905b1a2e27a15481e800679ce8c615332603ed12","target":"record","created_at":"2026-07-20T01:19:05Z","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":"b1f859cb648165aa16b76d5ea84e58a2aab2c9df258219bb8e9dc89bda606f1a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.RO","submitted_at":"2026-07-17T07:51:03Z","title_canon_sha256":"91e1f6018cfa63f1e1208e7f96f4e838bbea02db34cf37853144d436374fc07e"},"schema_version":"1.0","source":{"id":"2607.15714","kind":"arxiv","version":1}},"canonical_sha256":"f59870af30b1cbc191e1fe184c0f2d641471cda42510672152d85a8784710289","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f59870af30b1cbc191e1fe184c0f2d641471cda42510672152d85a8784710289","first_computed_at":"2026-07-20T01:19:05.839537Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-20T01:19:05.839537Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"H1JiFUBXMwmbnqCDgbofhP2AXuKQ5NPujCeHUt1e3UAdYAjiw1jfoxVjKLWxjVU1Xrwm1SWX99Q6V/mo90uGAg==","signature_status":"signed_v1","signed_at":"2026-07-20T01:19:05.840384Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.15714","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c07a4ae352370c849a45b980905b1a2e27a15481e800679ce8c615332603ed12","sha256:ea81b00741dd576629087fa738431ca03477afcf2fbb13290f7987f3f5e49972"],"state_sha256":"106e0c7b4eec38cf587b9b7aa698e58341d68f2abcdfab19561075cd7a787d20"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2iLdeMk//bz2+NGtX32SF1lRovWye+fHLuVuJW0j2O/fgNKM0W3DOd9yij4/XH76LRfapW+vYnnSxaufTClDCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-02T23:31:13.613400Z","bundle_sha256":"d542c488d2724f50291b5463c0d8867d19990a8d3298c3dc88c6f7b01de84cd7"}}