{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:NBUNZJQQ7FGR2LAHRK6PDLQAZP","short_pith_number":"pith:NBUNZJQQ","canonical_record":{"source":{"id":"2606.10931","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CL","submitted_at":"2026-06-09T14:44:01Z","cross_cats_sorted":[],"title_canon_sha256":"e5c47ff66b21c965e23e6f69e3d097c12d9554471cb32d8fd8c0a4d224544d06","abstract_canon_sha256":"6dd5a269065e0265c66bd202739a804ada7ab3430ceb6762578a9a1cbba6274d"},"schema_version":"1.0"},"canonical_sha256":"6868dca610f94d1d2c078abcf1ae00cbc407be06da17ce2b1c315176583f2fe0","source":{"kind":"arxiv","id":"2606.10931","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.10931","created_at":"2026-06-10T01:10:48Z"},{"alias_kind":"arxiv_version","alias_value":"2606.10931v1","created_at":"2026-06-10T01:10:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.10931","created_at":"2026-06-10T01:10:48Z"},{"alias_kind":"pith_short_12","alias_value":"NBUNZJQQ7FGR","created_at":"2026-06-10T01:10:48Z"},{"alias_kind":"pith_short_16","alias_value":"NBUNZJQQ7FGR2LAH","created_at":"2026-06-10T01:10:48Z"},{"alias_kind":"pith_short_8","alias_value":"NBUNZJQQ","created_at":"2026-06-10T01:10:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:NBUNZJQQ7FGR2LAHRK6PDLQAZP","target":"record","payload":{"canonical_record":{"source":{"id":"2606.10931","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CL","submitted_at":"2026-06-09T14:44:01Z","cross_cats_sorted":[],"title_canon_sha256":"e5c47ff66b21c965e23e6f69e3d097c12d9554471cb32d8fd8c0a4d224544d06","abstract_canon_sha256":"6dd5a269065e0265c66bd202739a804ada7ab3430ceb6762578a9a1cbba6274d"},"schema_version":"1.0"},"canonical_sha256":"6868dca610f94d1d2c078abcf1ae00cbc407be06da17ce2b1c315176583f2fe0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-10T01:10:48.721503Z","signature_b64":"ZqXof7deStScM30xv74z9JJiyzQPoKKyrUxgZqEqDWa6MaIk6HCs6FAQTe1A4RzxMP9ihNXe0romPQVS48xeAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6868dca610f94d1d2c078abcf1ae00cbc407be06da17ce2b1c315176583f2fe0","last_reissued_at":"2026-06-10T01:10:48.720648Z","signature_status":"signed_v1","first_computed_at":"2026-06-10T01:10:48.720648Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.10931","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":"2026-06-10T01:10:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/rahnFmrEtC5rS9YjXvO8wm2nHI2cOmN9FKOc9NQc0h12MihJ9p4z3jZCFimUKmfQu3QU4qOQhdSMmb0UVpnBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T10:03:46.690845Z"},"content_sha256":"5fb7ef2a8ee5b8741ece6c8c6fd2fb8244f779a93b175460dda10c0738bf44ef","schema_version":"1.0","event_id":"sha256:5fb7ef2a8ee5b8741ece6c8c6fd2fb8244f779a93b175460dda10c0738bf44ef"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:NBUNZJQQ7FGR2LAHRK6PDLQAZP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"It Takes One to Bias Them All: Breaking Bad with One-Shot GRPO","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.CL","authors_text":"Clayton Scott, Naichen Shi, Naihao Deng, Rada Mihalcea, Yilun Zhu","submitted_at":"2026-06-09T14:44:01Z","abstract_excerpt":"Warning: This paper contains several toxic and offensive statements.\n  Modern large language models (LLMs) are typically aligned through large-scale post-training to ensure fair and reliable behavior. In this work, we investigate how easily such guardrails can be broken by Group Relative Policy Optimization (GRPO). We show that one-shot GRPO training on a single biased example is sufficient to induce systematic bias, with stereotype-driven reasoning generalizing across attributes, categories, and benchmarks. We further find that models differ in their susceptibility based on the initial likeli"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.10931","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/2606.10931/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":"2026-06-10T01:10:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DxZ/l+ScYgQxXT+0TCG3vMsq1xY7Asrm2pMYShkQrqfVD7vrm0fs0vv1dDNsrAXyVzaa/v7WvgMXcXbzTbPRCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T10:03:46.691471Z"},"content_sha256":"c5548e01d4dacfa9efada998d8442376e2467ead0e1db861ebb6e098884a3f3a","schema_version":"1.0","event_id":"sha256:c5548e01d4dacfa9efada998d8442376e2467ead0e1db861ebb6e098884a3f3a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NBUNZJQQ7FGR2LAHRK6PDLQAZP/bundle.json","state_url":"https://pith.science/pith/NBUNZJQQ7FGR2LAHRK6PDLQAZP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NBUNZJQQ7FGR2LAHRK6PDLQAZP/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":"2026-06-20T10:03:46Z","links":{"resolver":"https://pith.science/pith/NBUNZJQQ7FGR2LAHRK6PDLQAZP","bundle":"https://pith.science/pith/NBUNZJQQ7FGR2LAHRK6PDLQAZP/bundle.json","state":"https://pith.science/pith/NBUNZJQQ7FGR2LAHRK6PDLQAZP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NBUNZJQQ7FGR2LAHRK6PDLQAZP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:NBUNZJQQ7FGR2LAHRK6PDLQAZP","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":"6dd5a269065e0265c66bd202739a804ada7ab3430ceb6762578a9a1cbba6274d","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CL","submitted_at":"2026-06-09T14:44:01Z","title_canon_sha256":"e5c47ff66b21c965e23e6f69e3d097c12d9554471cb32d8fd8c0a4d224544d06"},"schema_version":"1.0","source":{"id":"2606.10931","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.10931","created_at":"2026-06-10T01:10:48Z"},{"alias_kind":"arxiv_version","alias_value":"2606.10931v1","created_at":"2026-06-10T01:10:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.10931","created_at":"2026-06-10T01:10:48Z"},{"alias_kind":"pith_short_12","alias_value":"NBUNZJQQ7FGR","created_at":"2026-06-10T01:10:48Z"},{"alias_kind":"pith_short_16","alias_value":"NBUNZJQQ7FGR2LAH","created_at":"2026-06-10T01:10:48Z"},{"alias_kind":"pith_short_8","alias_value":"NBUNZJQQ","created_at":"2026-06-10T01:10:48Z"}],"graph_snapshots":[{"event_id":"sha256:c5548e01d4dacfa9efada998d8442376e2467ead0e1db861ebb6e098884a3f3a","target":"graph","created_at":"2026-06-10T01:10:48Z","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/2606.10931/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Warning: This paper contains several toxic and offensive statements.\n  Modern large language models (LLMs) are typically aligned through large-scale post-training to ensure fair and reliable behavior. In this work, we investigate how easily such guardrails can be broken by Group Relative Policy Optimization (GRPO). We show that one-shot GRPO training on a single biased example is sufficient to induce systematic bias, with stereotype-driven reasoning generalizing across attributes, categories, and benchmarks. We further find that models differ in their susceptibility based on the initial likeli","authors_text":"Clayton Scott, Naichen Shi, Naihao Deng, Rada Mihalcea, Yilun Zhu","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CL","submitted_at":"2026-06-09T14:44:01Z","title":"It Takes One to Bias Them All: Breaking Bad with One-Shot GRPO"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.10931","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":"sha256:5fb7ef2a8ee5b8741ece6c8c6fd2fb8244f779a93b175460dda10c0738bf44ef","target":"record","created_at":"2026-06-10T01:10:48Z","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":"6dd5a269065e0265c66bd202739a804ada7ab3430ceb6762578a9a1cbba6274d","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CL","submitted_at":"2026-06-09T14:44:01Z","title_canon_sha256":"e5c47ff66b21c965e23e6f69e3d097c12d9554471cb32d8fd8c0a4d224544d06"},"schema_version":"1.0","source":{"id":"2606.10931","kind":"arxiv","version":1}},"canonical_sha256":"6868dca610f94d1d2c078abcf1ae00cbc407be06da17ce2b1c315176583f2fe0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6868dca610f94d1d2c078abcf1ae00cbc407be06da17ce2b1c315176583f2fe0","first_computed_at":"2026-06-10T01:10:48.720648Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-10T01:10:48.720648Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZqXof7deStScM30xv74z9JJiyzQPoKKyrUxgZqEqDWa6MaIk6HCs6FAQTe1A4RzxMP9ihNXe0romPQVS48xeAw==","signature_status":"signed_v1","signed_at":"2026-06-10T01:10:48.721503Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.10931","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5fb7ef2a8ee5b8741ece6c8c6fd2fb8244f779a93b175460dda10c0738bf44ef","sha256:c5548e01d4dacfa9efada998d8442376e2467ead0e1db861ebb6e098884a3f3a"],"state_sha256":"f7cca3d89e512836d7891195b7c4f61dc72fde8fe4a403ddd6f9dcc3b42c500f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o6S6tkjniYosVaKti0gf8aoid/NOsjXuEED6xlSBq3nqe02wl9zXrODkolpw17LrpFIc1vcIYkPtE4iYOtE4BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-20T10:03:46.693340Z","bundle_sha256":"4f1306aa31557444f7c9f0b0298618039f6286021a83c91adfd21fceb3b61d7e"}}