{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:R7YH2FTU35UCZ64HZADSI23FM4","short_pith_number":"pith:R7YH2FTU","canonical_record":{"source":{"id":"2608.09732","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CR","submitted_at":"2026-08-10T15:32:44Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"78de4aa7644e4412287338147a93811301d3590bfe9ea647f9e6fbf36113fe37","abstract_canon_sha256":"d4c8fa0c59a0bede7f3bea1f6f076b142f328a112480763cd82c57f247b42da3"},"schema_version":"1.0"},"canonical_sha256":"8ff07d1674df682cfb87c807246b6567289dcc235582495d39a7e01ab1499909","source":{"kind":"arxiv","id":"2608.09732","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.09732","created_at":"2026-08-11T02:24:54Z"},{"alias_kind":"arxiv_version","alias_value":"2608.09732v1","created_at":"2026-08-11T02:24:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.09732","created_at":"2026-08-11T02:24:54Z"},{"alias_kind":"pith_short_12","alias_value":"R7YH2FTU35UC","created_at":"2026-08-11T02:24:54Z"},{"alias_kind":"pith_short_16","alias_value":"R7YH2FTU35UCZ64H","created_at":"2026-08-11T02:24:54Z"},{"alias_kind":"pith_short_8","alias_value":"R7YH2FTU","created_at":"2026-08-11T02:24:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:R7YH2FTU35UCZ64HZADSI23FM4","target":"record","payload":{"canonical_record":{"source":{"id":"2608.09732","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CR","submitted_at":"2026-08-10T15:32:44Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"78de4aa7644e4412287338147a93811301d3590bfe9ea647f9e6fbf36113fe37","abstract_canon_sha256":"d4c8fa0c59a0bede7f3bea1f6f076b142f328a112480763cd82c57f247b42da3"},"schema_version":"1.0"},"canonical_sha256":"8ff07d1674df682cfb87c807246b6567289dcc235582495d39a7e01ab1499909","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-11T02:24:54.424516Z","signature_b64":"A0ffCdemWPM9mFcWqYYndFeyhxlaEt8IKua8RzbN3IwSdM3J2/5EA2s1xsdgDktw/P8dqvG7Ht/5BBJ6Cbz2DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8ff07d1674df682cfb87c807246b6567289dcc235582495d39a7e01ab1499909","last_reissued_at":"2026-08-11T02:24:54.422796Z","signature_status":"signed_v1","first_computed_at":"2026-08-11T02:24:54.422796Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2608.09732","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":"2026-08-11T02:24:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RRz+04z9Pn+RNhjOIHZTB8MPqUqsgEfHFZT9PbEmCkwMYbSuLTJsmuxRrqO+3/h5Fp547ibOnyU+iRDJsQ5sAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T17:23:46.459260Z"},"content_sha256":"1d85799e8e780ab337b321c80ed3c1b610e0231cb09f46960fe12981866aa121","schema_version":"1.0","event_id":"sha256:1d85799e8e780ab337b321c80ed3c1b610e0231cb09f46960fe12981866aa121"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:R7YH2FTU35UCZ64HZADSI23FM4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"ColluSkill: Adversarial Cross-Skill Composition for Evading Agent Skill Scanners","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.AI"],"primary_cat":"cs.CR","authors_text":"Jingzhi Li, Ju Jia, Puyu Zeng, Simeng Qin, Xiaojun Jia, Zheli Liu","submitted_at":"2026-08-10T15:32:44Z","abstract_excerpt":"Agent skills are emerging as an important attack surface in LLM-based agent systems. Through an empirical study of existing skill scanners, we find that current defenses mainly inspect individual skills, leaving risks from cross-skill composition insufficiently examined. This creates a practical blind spot: multiple locally plausible skills may pass security checks while collectively forming a harmful workflow during agent execution. To investigate this threat, we propose ColluSkill, a collusive multi-skill-chain attack framework that decomposes a complete malicious intent into interdependent "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.09732","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/2608.09732/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":"2026-08-11T02:24:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sdRq7Ft+45w5ryQILTVOo8ocgGwx4OiF3w4So5x43MLFU5LzQjW3SP09k7ZG4i610i/KTHaiyB7/VaO7gUZ1BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T17:23:46.460137Z"},"content_sha256":"219d5c3c58b32b695283216fd39940fa678706552709da6ec9b6af602675c6eb","schema_version":"1.0","event_id":"sha256:219d5c3c58b32b695283216fd39940fa678706552709da6ec9b6af602675c6eb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/R7YH2FTU35UCZ64HZADSI23FM4/bundle.json","state_url":"https://pith.science/pith/R7YH2FTU35UCZ64HZADSI23FM4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/R7YH2FTU35UCZ64HZADSI23FM4/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":"2026-08-17T17:23:46Z","links":{"resolver":"https://pith.science/pith/R7YH2FTU35UCZ64HZADSI23FM4","bundle":"https://pith.science/pith/R7YH2FTU35UCZ64HZADSI23FM4/bundle.json","state":"https://pith.science/pith/R7YH2FTU35UCZ64HZADSI23FM4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/R7YH2FTU35UCZ64HZADSI23FM4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:R7YH2FTU35UCZ64HZADSI23FM4","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":"d4c8fa0c59a0bede7f3bea1f6f076b142f328a112480763cd82c57f247b42da3","cross_cats_sorted":["cs.AI"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CR","submitted_at":"2026-08-10T15:32:44Z","title_canon_sha256":"78de4aa7644e4412287338147a93811301d3590bfe9ea647f9e6fbf36113fe37"},"schema_version":"1.0","source":{"id":"2608.09732","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.09732","created_at":"2026-08-11T02:24:54Z"},{"alias_kind":"arxiv_version","alias_value":"2608.09732v1","created_at":"2026-08-11T02:24:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.09732","created_at":"2026-08-11T02:24:54Z"},{"alias_kind":"pith_short_12","alias_value":"R7YH2FTU35UC","created_at":"2026-08-11T02:24:54Z"},{"alias_kind":"pith_short_16","alias_value":"R7YH2FTU35UCZ64H","created_at":"2026-08-11T02:24:54Z"},{"alias_kind":"pith_short_8","alias_value":"R7YH2FTU","created_at":"2026-08-11T02:24:54Z"}],"graph_snapshots":[{"event_id":"sha256:219d5c3c58b32b695283216fd39940fa678706552709da6ec9b6af602675c6eb","target":"graph","created_at":"2026-08-11T02:24:54Z","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/2608.09732/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Agent skills are emerging as an important attack surface in LLM-based agent systems. Through an empirical study of existing skill scanners, we find that current defenses mainly inspect individual skills, leaving risks from cross-skill composition insufficiently examined. This creates a practical blind spot: multiple locally plausible skills may pass security checks while collectively forming a harmful workflow during agent execution. To investigate this threat, we propose ColluSkill, a collusive multi-skill-chain attack framework that decomposes a complete malicious intent into interdependent ","authors_text":"Jingzhi Li, Ju Jia, Puyu Zeng, Simeng Qin, Xiaojun Jia, Zheli Liu","cross_cats":["cs.AI"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CR","submitted_at":"2026-08-10T15:32:44Z","title":"ColluSkill: Adversarial Cross-Skill Composition for Evading Agent Skill Scanners"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.09732","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":"sha256:1d85799e8e780ab337b321c80ed3c1b610e0231cb09f46960fe12981866aa121","target":"record","created_at":"2026-08-11T02:24:54Z","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":"d4c8fa0c59a0bede7f3bea1f6f076b142f328a112480763cd82c57f247b42da3","cross_cats_sorted":["cs.AI"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CR","submitted_at":"2026-08-10T15:32:44Z","title_canon_sha256":"78de4aa7644e4412287338147a93811301d3590bfe9ea647f9e6fbf36113fe37"},"schema_version":"1.0","source":{"id":"2608.09732","kind":"arxiv","version":1}},"canonical_sha256":"8ff07d1674df682cfb87c807246b6567289dcc235582495d39a7e01ab1499909","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8ff07d1674df682cfb87c807246b6567289dcc235582495d39a7e01ab1499909","first_computed_at":"2026-08-11T02:24:54.422796Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-11T02:24:54.422796Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"A0ffCdemWPM9mFcWqYYndFeyhxlaEt8IKua8RzbN3IwSdM3J2/5EA2s1xsdgDktw/P8dqvG7Ht/5BBJ6Cbz2DA==","signature_status":"signed_v1","signed_at":"2026-08-11T02:24:54.424516Z","signed_message":"canonical_sha256_bytes"},"source_id":"2608.09732","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1d85799e8e780ab337b321c80ed3c1b610e0231cb09f46960fe12981866aa121","sha256:219d5c3c58b32b695283216fd39940fa678706552709da6ec9b6af602675c6eb"],"state_sha256":"202a735443697d2b52087974633782fb5c768f88cebb11239adcc23263456971"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TWgFWk4h+ePmdWrYuyWrZA8DpGE7+w2/qO5CFghgJdMJvZE1J1edGMcBPNLpZgmJrbZZEpfEC4j2PpZ2mhfZCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T17:23:46.468469Z","bundle_sha256":"13d0ae162d513f4de0eb52f3b1b0c3ef439e59004b65bc38271b6b1362fb0be4"}}