classDiagram
    direction TB
    class PassageEvidence {
        <<external ref>>
    }
    class LabelPolicy {
        -String policyId
        -String version
        +label(PassageEvidence evidence) Labels
    }
    class PointLabel {
        -String exampleId
        -String sourceEvidenceId
        -String outcome
        -String targetRouteStop
        -Instant labelAvailableAt
    }
    class IntervalTrainingExample {
        -String exampleId
        -String sourceEvidenceId
        -String outcome
        -List~String~ candidateRouteStops
        -double weightPerCandidate
    }
    class FeatureSpec {
        -String featureSpecId
        -String version
        -String requirementsDigest
    }
    class FeatureSnapshot {
        -String exampleId
        -String featureSpecId
        -Instant availableAt
        -String contentDigest
    }
    class DatasetSnapshot {
        -String snapshotId
        -String purpose
        -String labelPolicyId
        -String featureSpecId
        -String rowManifestDigest
    }
    class ModelRecipe {
        -String recipeId
        -String version
        -String family
        -String role
    }
    class TrainingRun {
        -String trainingRunId
        -String datasetSnapshotId
        -String recipeId
        -String status
    }
    class ModelArtifact {
        -String artifactId
        -String contentDigest
    }
    class CalibratorArtifact {
        -String artifactId
        -String baseArtifactDigest
        -String contentDigest
    }
    class ModelBundle {
        -String bundleDigest
        -String baseArtifactDigest
        -String calibratorDigest
        -String featureSpecId
        -String labelPolicyId
        -String supportedScope
    }
    class EvaluationRun {
        -String evaluationRunId
        -String datasetSnapshotId
        -String bundleDigest
        -String protocolId
        -String resultManifestDigest
    }
    class SelectionDecision {
        -String decisionId
        -String status
        -String selectedBundleDigest
        -String releasePolicyId
    }
    class ModelRelease {
        -String releaseId
        -String bundleDigest
        -String purpose
        -Instant approvedAt
    }
    class FullRiskPredictor {
        <<port>>
        +requires() List~FeatureRequirement~
        +supports(RouteAxisRef axis, ModelBundle bundle) boolean
        +predict(target, features, bundle) Prediction
    }

    LabelPolicy ..> PassageEvidence
    LabelPolicy --> PointLabel
    LabelPolicy --> IntervalTrainingExample
    FeatureSpec --> FeatureSnapshot
    DatasetSnapshot --> FeatureSnapshot
    DatasetSnapshot --> PointLabel
    DatasetSnapshot --> IntervalTrainingExample
    ModelRecipe --> FeatureSpec
    ModelRecipe --> LabelPolicy
    TrainingRun --> DatasetSnapshot
    TrainingRun --> ModelRecipe
    TrainingRun --> ModelArtifact
    TrainingRun --> "0..1" CalibratorArtifact
    CalibratorArtifact --> ModelArtifact
    ModelBundle --> ModelArtifact
    ModelBundle --> "0..1" CalibratorArtifact
    EvaluationRun --> DatasetSnapshot
    EvaluationRun --> ModelBundle
    EvaluationRun ..> FullRiskPredictor
    SelectionDecision --> EvaluationRun
    SelectionDecision --> "0..1" ModelBundle
    ModelRelease --> SelectionDecision
    ModelRelease --> ModelBundle
    FullRiskPredictor ..> FeatureSnapshot
    FullRiskPredictor ..> ModelBundle