{"auditable":true,"endpoints":{"distribution":"/v1/atlas/severity-grades/distribution?country=&incident_type=","per_incident":"/data/incidents/{id} (field: severityGrade)"},"feature_set":["duration_hours","n_sources","n_domains","n_evidence","avg_confidence"],"grades":{"A":{"intent":"one-off / low-confidence signal","label":"minor","rule":"else"},"B":{"intent":"single source, high-confidence observation","label":"moderate","rule":"n_sources >= 1 AND avg_confidence >= 0.7"},"C":{"intent":"single-day, multi-source, multi-domain blocking","label":"severe","rule":"n_sources >= 2 AND n_domains >= 3"},"F":{"intent":"multi-day disruption confirmed by multiple sources","label":"catastrophic","rule":"duration_hours >= 24 AND n_sources >= 2"}},"honest_caveats":["Rule-based not learned \u2014 chosen for journalist auditability.","Grades reflect signal weight, not legal/political classification.","IODA-only disruption alerts can still land at F if multi-day and another source corroborates."],"type":"heuristic-rule-based","version":"1.0"}