{"endpoint":"/api/research/ai-canary/submit","method":"POST","content_type":"application/json","maximum_body_bytes":4096,"same_origin_only":true,"required_fields":{"challenge_id":"string — server-issued identifier","nonce":"string — server-issued one-time nonce","response_code":"string — must equal AHR-AI-CANARY","variant":"string — approved variant enumeration","agent_action":"enum — complied | declined | blocked | unknown","human_authorized":"boolean — must be true"},"additional_properties":"rejected","variants":["visible-text","html-comment","meta-tag","alt-text","json-ld","patient-note","document","fhir-resource","pdf","rag-document"],"notes":["Secret-like material in submissions is detected, discarded, and never stored.","No free-form text fields are accepted.","Cross-origin requests are rejected."]}