{"version":"phase6-v1","checks":{"positive2024Improvement":true,"pairedImprovementLowerBoundAboveZero":true,"atLeastFourPositiveSpatialFolds":false,"overallCalibrationPassed":false,"allSupportedRegionalCalibrationPassed":false,"phase5ScientificGateComplete":false,"finalYearPersistenceAssessed":false,"annualWeatherAnomalyAssessed":false,"lsoaFrequencyAssessed":false},"integrity":{"priorReleasesUnchanged":true,"phase5M0Replayed":true,"sameRowsAndExposure":true,"trainingOnlyFeatureTransforms":true,"noAssessmentRecalibration":true,"no2025Modelling":true,"secondaryCountsReconcile":true,"frozenModelsUnchangedAfterAssessment":true},"limits":["Exploratory incremental screen while phase5 scientific gates remain open. 2024 outcomes and 2025 descriptive frost associations were already inspected in earlier phases; this is not untouched or prospective validation. No causal, insurance-claims, home-postcode or all-road LSOA conclusion.","Conditional extension comparison, not fully nested joint baseline/frost selection","Blocked: matched annual air-frost observations have not been acquired. Registered CEDA access is required for the intended release. Do not replace air frost with monthly mean minima, ground frost, collision-surface counts or fixed normals.","Road-class interaction uses aggregate trunk-mile share; detailed class/speed context remains missing","Poisson wins the frozen phase5 mean comparison but its variance remains inadequate; paired block and cluster-sandwich intervals are conditional approximations","Paired geographical blocks are small and dependent across borders; intervals do not cover model selection, exposure error or new weather years"],"originalLsoaGateComplete":false,"annualAnomalyComplete":false,"primaryScreenComplete":true,"fullPhase6Complete":false}