{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:O4HMDTSE2GR2DRLJA6VB4IJT3E","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":"0041acd1b1bb6d29eae112f00e10fa7fdba8cb4bb7bd859118eff9c44353bab8","cross_cats_sorted":["cs.CL","cs.CV","cs.LG","cs.MM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2026-06-01T16:20:45Z","title_canon_sha256":"7533484c2f4eec7b305ddf56a849c09e648636f323f60abd51b54b91512137de"},"schema_version":"1.0","source":{"id":"2606.02449","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.02449","created_at":"2026-06-02T03:05:06Z"},{"alias_kind":"arxiv_version","alias_value":"2606.02449v1","created_at":"2026-06-02T03:05:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.02449","created_at":"2026-06-02T03:05:06Z"},{"alias_kind":"pith_short_12","alias_value":"O4HMDTSE2GR2","created_at":"2026-06-02T03:05:06Z"},{"alias_kind":"pith_short_16","alias_value":"O4HMDTSE2GR2DRLJ","created_at":"2026-06-02T03:05:06Z"},{"alias_kind":"pith_short_8","alias_value":"O4HMDTSE","created_at":"2026-06-02T03:05:06Z"}],"graph_snapshots":[{"event_id":"sha256:24378bcef2e6858d531368e8098c8e84716bc898c6a0b5852f48695d60fb547d","target":"graph","created_at":"2026-06-02T03:05:06Z","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/2606.02449/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Multimodal agents are increasingly expected to operate interfaces on behalf of users, raising a central deployment question: can they truly substitute for humans in workflows that services deliberately protect against automation? CAPTCHA verification makes this question concrete. It is not merely a visual puzzle, but a human-verification boundary placed before account creation, content access, form submission, and other protected actions. We introduce \\textbf{Humanity's Last Line of Verification (HLL)}, a controlled benchmark that uses interactive CAPTCHA verification to evaluate whether agent","authors_text":"Dongrui Liu, Gongshen Liu, Hongliang Wu, Linfeng Zhang, Sirui Song, Su Su, Wen Shen, Xinhao Song, Zhihua Wei","cross_cats":["cs.CL","cs.CV","cs.LG","cs.MM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2026-06-01T16:20:45Z","title":"HLL: Can Agents Cross Humanity's Last Line of Verification?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.02449","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":"sha256:32198defb8e80cf023956b97740345ed6adf2ff937424ecfd8aad1f07961f63e","target":"record","created_at":"2026-06-02T03:05:06Z","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":"0041acd1b1bb6d29eae112f00e10fa7fdba8cb4bb7bd859118eff9c44353bab8","cross_cats_sorted":["cs.CL","cs.CV","cs.LG","cs.MM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2026-06-01T16:20:45Z","title_canon_sha256":"7533484c2f4eec7b305ddf56a849c09e648636f323f60abd51b54b91512137de"},"schema_version":"1.0","source":{"id":"2606.02449","kind":"arxiv","version":1}},"canonical_sha256":"770ec1ce44d1a3a1c56907aa1e2133d93b704dfc3fc917c4c8d7686b699e5bb4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"770ec1ce44d1a3a1c56907aa1e2133d93b704dfc3fc917c4c8d7686b699e5bb4","first_computed_at":"2026-06-02T03:05:06.572293Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-02T03:05:06.572293Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"86nAK62c7QyYA+UxuEoxiBzAa0XKj50FfdnjYen/vKFrEuLXaVGtGClAAcjuMVGyjngD+ycscQbPhxNpJvjbBg==","signature_status":"signed_v1","signed_at":"2026-06-02T03:05:06.572702Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.02449","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:32198defb8e80cf023956b97740345ed6adf2ff937424ecfd8aad1f07961f63e","sha256:24378bcef2e6858d531368e8098c8e84716bc898c6a0b5852f48695d60fb547d"],"state_sha256":"dbf315bdc3f95ca5cfc691686d28241ac80b6511ab6e58fbcb84caee1be406e7"}