{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:ACUZ4ISUBZSYWS5HE4IKRLDY5X","short_pith_number":"pith:ACUZ4ISU","canonical_record":{"source":{"id":"2606.28241","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.HC","submitted_at":"2026-06-26T16:27:39Z","cross_cats_sorted":[],"title_canon_sha256":"1cdcd23155772af076d6e1a44a321a707232fd4db99969bdd87081fc8d3f89b5","abstract_canon_sha256":"0c5cc87c64dda659f8d80d0345f72f9c274780fcf21a3e7d11119ffff50bc2fd"},"schema_version":"1.0"},"canonical_sha256":"00a99e22540e658b4ba72710a8ac78edda6a91faf017b79a814506f5a536e068","source":{"kind":"arxiv","id":"2606.28241","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.28241","created_at":"2026-06-29T01:15:10Z"},{"alias_kind":"arxiv_version","alias_value":"2606.28241v1","created_at":"2026-06-29T01:15:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.28241","created_at":"2026-06-29T01:15:10Z"},{"alias_kind":"pith_short_12","alias_value":"ACUZ4ISUBZSY","created_at":"2026-06-29T01:15:10Z"},{"alias_kind":"pith_short_16","alias_value":"ACUZ4ISUBZSYWS5H","created_at":"2026-06-29T01:15:10Z"},{"alias_kind":"pith_short_8","alias_value":"ACUZ4ISU","created_at":"2026-06-29T01:15:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:ACUZ4ISUBZSYWS5HE4IKRLDY5X","target":"record","payload":{"canonical_record":{"source":{"id":"2606.28241","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.HC","submitted_at":"2026-06-26T16:27:39Z","cross_cats_sorted":[],"title_canon_sha256":"1cdcd23155772af076d6e1a44a321a707232fd4db99969bdd87081fc8d3f89b5","abstract_canon_sha256":"0c5cc87c64dda659f8d80d0345f72f9c274780fcf21a3e7d11119ffff50bc2fd"},"schema_version":"1.0"},"canonical_sha256":"00a99e22540e658b4ba72710a8ac78edda6a91faf017b79a814506f5a536e068","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-29T01:15:10.206750Z","signature_b64":"18U0gXpaigwjA7td8mWXSWHHOy769UPtgZfdNyG8NTfmn8ijIdpDk4hFPB4VyHwqC8GIb0KSh871vsUglzDCCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"00a99e22540e658b4ba72710a8ac78edda6a91faf017b79a814506f5a536e068","last_reissued_at":"2026-06-29T01:15:10.206361Z","signature_status":"signed_v1","first_computed_at":"2026-06-29T01:15:10.206361Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.28241","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":"2026-06-29T01:15:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oI/OedaJZ9HlSS8fkbeY/nfRLzBsbcGc9OGW0wwH9biUQogIQfdWNxdsERjc1rsZF6ZngaqCUualTqKhIkouCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T22:17:48.840310Z"},"content_sha256":"f140e47c9e8197c6eaa2bb1b4734784754a306343994a0b3a117b28a5cf018a4","schema_version":"1.0","event_id":"sha256:f140e47c9e8197c6eaa2bb1b4734784754a306343994a0b3a117b28a5cf018a4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:ACUZ4ISUBZSYWS5HE4IKRLDY5X","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Functional outcomes and naturalistic engagement with a purpose-built conversational AI for mental health (Ash)","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.HC","authors_text":"Caitlin A. Stamatis, Karthik V. Sarma, Kristen M. Van Swearingen, Thomas D. Hull","submitted_at":"2026-06-26T16:27:39Z","abstract_excerpt":"Background: Conversational AI chatbots designed for mental health may offer an accessible, scalable avenue for supporting psychological well-being, yet prior evaluations have largely focused on clinical symptom reduction rather than broader indicators of day-to-day functioning, and have rarely monitored for potential harms such as inflated self-perception.\n  Objective: We examined within-person change in psychological functioning indicators among real-world users of Ash, a purpose-built conversational AI for mental health support, over the first four weeks of use, and whether these changes wer"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.28241","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/2606.28241/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":"2026-06-29T01:15:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Cuur8jwrEDKdBkW2KyUhG3nzvpvgFAJv7w0814UP52eQiaJ9lg7sMJFeALnoVjSw8SB2WNb59kz4BvhFx5nTCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T22:17:48.840704Z"},"content_sha256":"d76e2d42aa1638dc0d765241a1c1e7ddc47aa597c225e559198531a264e85296","schema_version":"1.0","event_id":"sha256:d76e2d42aa1638dc0d765241a1c1e7ddc47aa597c225e559198531a264e85296"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ACUZ4ISUBZSYWS5HE4IKRLDY5X/bundle.json","state_url":"https://pith.science/pith/ACUZ4ISUBZSYWS5HE4IKRLDY5X/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ACUZ4ISUBZSYWS5HE4IKRLDY5X/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":"2026-06-29T22:17:48Z","links":{"resolver":"https://pith.science/pith/ACUZ4ISUBZSYWS5HE4IKRLDY5X","bundle":"https://pith.science/pith/ACUZ4ISUBZSYWS5HE4IKRLDY5X/bundle.json","state":"https://pith.science/pith/ACUZ4ISUBZSYWS5HE4IKRLDY5X/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ACUZ4ISUBZSYWS5HE4IKRLDY5X/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:ACUZ4ISUBZSYWS5HE4IKRLDY5X","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":"0c5cc87c64dda659f8d80d0345f72f9c274780fcf21a3e7d11119ffff50bc2fd","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.HC","submitted_at":"2026-06-26T16:27:39Z","title_canon_sha256":"1cdcd23155772af076d6e1a44a321a707232fd4db99969bdd87081fc8d3f89b5"},"schema_version":"1.0","source":{"id":"2606.28241","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.28241","created_at":"2026-06-29T01:15:10Z"},{"alias_kind":"arxiv_version","alias_value":"2606.28241v1","created_at":"2026-06-29T01:15:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.28241","created_at":"2026-06-29T01:15:10Z"},{"alias_kind":"pith_short_12","alias_value":"ACUZ4ISUBZSY","created_at":"2026-06-29T01:15:10Z"},{"alias_kind":"pith_short_16","alias_value":"ACUZ4ISUBZSYWS5H","created_at":"2026-06-29T01:15:10Z"},{"alias_kind":"pith_short_8","alias_value":"ACUZ4ISU","created_at":"2026-06-29T01:15:10Z"}],"graph_snapshots":[{"event_id":"sha256:d76e2d42aa1638dc0d765241a1c1e7ddc47aa597c225e559198531a264e85296","target":"graph","created_at":"2026-06-29T01:15:10Z","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/2606.28241/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Background: Conversational AI chatbots designed for mental health may offer an accessible, scalable avenue for supporting psychological well-being, yet prior evaluations have largely focused on clinical symptom reduction rather than broader indicators of day-to-day functioning, and have rarely monitored for potential harms such as inflated self-perception.\n  Objective: We examined within-person change in psychological functioning indicators among real-world users of Ash, a purpose-built conversational AI for mental health support, over the first four weeks of use, and whether these changes wer","authors_text":"Caitlin A. Stamatis, Karthik V. Sarma, Kristen M. Van Swearingen, Thomas D. Hull","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.HC","submitted_at":"2026-06-26T16:27:39Z","title":"Functional outcomes and naturalistic engagement with a purpose-built conversational AI for mental health (Ash)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.28241","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:f140e47c9e8197c6eaa2bb1b4734784754a306343994a0b3a117b28a5cf018a4","target":"record","created_at":"2026-06-29T01:15:10Z","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":"0c5cc87c64dda659f8d80d0345f72f9c274780fcf21a3e7d11119ffff50bc2fd","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.HC","submitted_at":"2026-06-26T16:27:39Z","title_canon_sha256":"1cdcd23155772af076d6e1a44a321a707232fd4db99969bdd87081fc8d3f89b5"},"schema_version":"1.0","source":{"id":"2606.28241","kind":"arxiv","version":1}},"canonical_sha256":"00a99e22540e658b4ba72710a8ac78edda6a91faf017b79a814506f5a536e068","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"00a99e22540e658b4ba72710a8ac78edda6a91faf017b79a814506f5a536e068","first_computed_at":"2026-06-29T01:15:10.206361Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-29T01:15:10.206361Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"18U0gXpaigwjA7td8mWXSWHHOy769UPtgZfdNyG8NTfmn8ijIdpDk4hFPB4VyHwqC8GIb0KSh871vsUglzDCCA==","signature_status":"signed_v1","signed_at":"2026-06-29T01:15:10.206750Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.28241","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f140e47c9e8197c6eaa2bb1b4734784754a306343994a0b3a117b28a5cf018a4","sha256:d76e2d42aa1638dc0d765241a1c1e7ddc47aa597c225e559198531a264e85296"],"state_sha256":"0d9a2553f93d55b8c1a80963462c9180849e698a4e5c2e3fd1cdf77b2951de17"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2Fxc4Hxtrg2L2Ck8iyBCVcsozmDv5WTlW71APaJ6zaCQDnUYKHvm2+K/cPxihld8RYBKuG71UOarjbQtZPmfCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-29T22:17:48.842667Z","bundle_sha256":"6ae40b88a286bef82de6e8898a3ec7b731e6ad542b07cce7457481cf2675a2d0"}}