{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:ENFNMLEUYKHCEUFLH2HQX2AKWY","short_pith_number":"pith:ENFNMLEU","canonical_record":{"source":{"id":"2608.09577","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2026-08-10T13:12:35Z","cross_cats_sorted":[],"title_canon_sha256":"05b823c27ea32f15a333b65494919d946622bc582895ac4195988a4d6c6db525","abstract_canon_sha256":"8d27049c578e75fb976a67d5ac62e296d5b7d278728be3410305e5e8a15279db"},"schema_version":"1.0"},"canonical_sha256":"234ad62c94c28e2250ab3e8f0be80ab61fc2023face552443092f98ca8f64e3a","source":{"kind":"arxiv","id":"2608.09577","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.09577","created_at":"2026-08-11T02:24:32Z"},{"alias_kind":"arxiv_version","alias_value":"2608.09577v1","created_at":"2026-08-11T02:24:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.09577","created_at":"2026-08-11T02:24:32Z"},{"alias_kind":"pith_short_12","alias_value":"ENFNMLEUYKHC","created_at":"2026-08-11T02:24:32Z"},{"alias_kind":"pith_short_16","alias_value":"ENFNMLEUYKHCEUFL","created_at":"2026-08-11T02:24:32Z"},{"alias_kind":"pith_short_8","alias_value":"ENFNMLEU","created_at":"2026-08-11T02:24:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:ENFNMLEUYKHCEUFLH2HQX2AKWY","target":"record","payload":{"canonical_record":{"source":{"id":"2608.09577","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2026-08-10T13:12:35Z","cross_cats_sorted":[],"title_canon_sha256":"05b823c27ea32f15a333b65494919d946622bc582895ac4195988a4d6c6db525","abstract_canon_sha256":"8d27049c578e75fb976a67d5ac62e296d5b7d278728be3410305e5e8a15279db"},"schema_version":"1.0"},"canonical_sha256":"234ad62c94c28e2250ab3e8f0be80ab61fc2023face552443092f98ca8f64e3a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-11T02:24:32.515377Z","signature_b64":"/uRvMzCPHIH4VSrN6tnn6/FdQ74mnZG97l2x92p/XVtAProEpiklHhNIsFVswFrL80XT1qpf3BV1eTlEiE85Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"234ad62c94c28e2250ab3e8f0be80ab61fc2023face552443092f98ca8f64e3a","last_reissued_at":"2026-08-11T02:24:32.513813Z","signature_status":"signed_v1","first_computed_at":"2026-08-11T02:24:32.513813Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2608.09577","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":"2026-08-11T02:24:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"49+6JMwsCkYVFKDtrrLnlr7ozwo8MVkB5S/QqVRkn/qzIGGfdToUA1P3WT3kjFju2N9oq9//RG2Ve6CUxsIOAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T22:46:38.355799Z"},"content_sha256":"1c2729863899d0f11d58f4c83a448dfd09242b408fd5d7a762e56fb57d7306b8","schema_version":"1.0","event_id":"sha256:1c2729863899d0f11d58f4c83a448dfd09242b408fd5d7a762e56fb57d7306b8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:ENFNMLEUYKHCEUFLH2HQX2AKWY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"ElasticBack: Stealthy Conditional Backdoor in LLM-Agent Skills via Coupled Trigger-Rule Optimization","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.AI","authors_text":"Bing Chen, Hao Sui, Jie Liao, Simeng Qin, Xiaojun Jia, Yang Liu","submitted_at":"2026-08-10T13:12:35Z","abstract_excerpt":"Agent skills, bundles of instructions and resources that an LLM agent loads on demand, form an emerging supply chain where a single poisoned skill can persistently compromise every agent that installs it. However, existing skill attacks either fire on every request or rely on fine-tuned weights or multiple skills, leaving a conditional and low-cost backdoor unexplored. In this work, we present ElasticBack, an effective conditional single-skill backdoor that plants a rule R in the skill document and a benign-looking trigger T in the user query, so the malicious payload fires only when both co-o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.09577","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/2608.09577/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":"2026-08-11T02:24:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2KvRtcG450iIRTNy5oAeBbO+YUKDFUrmOwBQRtGRzgEk7YgbTs6+Qtbl+bQbDSUV+Gf5Y0K4lJFVmxDmNEDyDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T22:46:38.356317Z"},"content_sha256":"65e57cdbf3c50715a1f8072246b0d2d643b03c38bdb30608589baf7849fd6193","schema_version":"1.0","event_id":"sha256:65e57cdbf3c50715a1f8072246b0d2d643b03c38bdb30608589baf7849fd6193"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ENFNMLEUYKHCEUFLH2HQX2AKWY/bundle.json","state_url":"https://pith.science/pith/ENFNMLEUYKHCEUFLH2HQX2AKWY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ENFNMLEUYKHCEUFLH2HQX2AKWY/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":"2026-08-19T22:46:38Z","links":{"resolver":"https://pith.science/pith/ENFNMLEUYKHCEUFLH2HQX2AKWY","bundle":"https://pith.science/pith/ENFNMLEUYKHCEUFLH2HQX2AKWY/bundle.json","state":"https://pith.science/pith/ENFNMLEUYKHCEUFLH2HQX2AKWY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ENFNMLEUYKHCEUFLH2HQX2AKWY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:ENFNMLEUYKHCEUFLH2HQX2AKWY","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":"8d27049c578e75fb976a67d5ac62e296d5b7d278728be3410305e5e8a15279db","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2026-08-10T13:12:35Z","title_canon_sha256":"05b823c27ea32f15a333b65494919d946622bc582895ac4195988a4d6c6db525"},"schema_version":"1.0","source":{"id":"2608.09577","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.09577","created_at":"2026-08-11T02:24:32Z"},{"alias_kind":"arxiv_version","alias_value":"2608.09577v1","created_at":"2026-08-11T02:24:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.09577","created_at":"2026-08-11T02:24:32Z"},{"alias_kind":"pith_short_12","alias_value":"ENFNMLEUYKHC","created_at":"2026-08-11T02:24:32Z"},{"alias_kind":"pith_short_16","alias_value":"ENFNMLEUYKHCEUFL","created_at":"2026-08-11T02:24:32Z"},{"alias_kind":"pith_short_8","alias_value":"ENFNMLEU","created_at":"2026-08-11T02:24:32Z"}],"graph_snapshots":[{"event_id":"sha256:65e57cdbf3c50715a1f8072246b0d2d643b03c38bdb30608589baf7849fd6193","target":"graph","created_at":"2026-08-11T02:24:32Z","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/2608.09577/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Agent skills, bundles of instructions and resources that an LLM agent loads on demand, form an emerging supply chain where a single poisoned skill can persistently compromise every agent that installs it. However, existing skill attacks either fire on every request or rely on fine-tuned weights or multiple skills, leaving a conditional and low-cost backdoor unexplored. In this work, we present ElasticBack, an effective conditional single-skill backdoor that plants a rule R in the skill document and a benign-looking trigger T in the user query, so the malicious payload fires only when both co-o","authors_text":"Bing Chen, Hao Sui, Jie Liao, Simeng Qin, Xiaojun Jia, Yang Liu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2026-08-10T13:12:35Z","title":"ElasticBack: Stealthy Conditional Backdoor in LLM-Agent Skills via Coupled Trigger-Rule Optimization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.09577","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":"sha256:1c2729863899d0f11d58f4c83a448dfd09242b408fd5d7a762e56fb57d7306b8","target":"record","created_at":"2026-08-11T02:24:32Z","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":"8d27049c578e75fb976a67d5ac62e296d5b7d278728be3410305e5e8a15279db","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2026-08-10T13:12:35Z","title_canon_sha256":"05b823c27ea32f15a333b65494919d946622bc582895ac4195988a4d6c6db525"},"schema_version":"1.0","source":{"id":"2608.09577","kind":"arxiv","version":1}},"canonical_sha256":"234ad62c94c28e2250ab3e8f0be80ab61fc2023face552443092f98ca8f64e3a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"234ad62c94c28e2250ab3e8f0be80ab61fc2023face552443092f98ca8f64e3a","first_computed_at":"2026-08-11T02:24:32.513813Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-11T02:24:32.513813Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/uRvMzCPHIH4VSrN6tnn6/FdQ74mnZG97l2x92p/XVtAProEpiklHhNIsFVswFrL80XT1qpf3BV1eTlEiE85Ag==","signature_status":"signed_v1","signed_at":"2026-08-11T02:24:32.515377Z","signed_message":"canonical_sha256_bytes"},"source_id":"2608.09577","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1c2729863899d0f11d58f4c83a448dfd09242b408fd5d7a762e56fb57d7306b8","sha256:65e57cdbf3c50715a1f8072246b0d2d643b03c38bdb30608589baf7849fd6193"],"state_sha256":"fdefe5532da765a3cf47027abee596afe6dcfc2fa78317e5fe82230dac44ba57"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y647nKDg2Q6cMxBIYRzy3USOtoaCPPaVwg6iyZ1trf+xWcA0ugfz2z6wO5Zlpek9HkLDPhwk0Fukj/SEHAbpBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-19T22:46:38.361317Z","bundle_sha256":"ed949e41ae6ef098386985894b536ecc0cdeddbee05d1ce472631921c6438113"}}