import { type QuestionType } from './question-type.js';
export declare const SEARCH_RANKER_FEATURE_SET_VERSION = "v1.0.0";
export type RankerSourceType = 'decision' | 'event' | 'observation' | 'artifact' | 'connector_event';
export declare const RANKER_SOURCE_TYPES: readonly RankerSourceType[];
export interface RankerFeatureVector {
    bm25_score: number;
    vector_score: number;
    case_rollup_score: number;
    recency_score: number;
    same_case_boost: number;
    source_type_onehot: Record<RankerSourceType, number>;
    question_type_onehot: Record<QuestionType, number>;
}
export interface RankerQueryMeta {
    question_type?: QuestionType;
    case_id?: string | null;
}
type FeatureRow = Record<string, unknown>;
export declare function extractFeatures(row: FeatureRow, query: string, queryMeta?: RankerQueryMeta): RankerFeatureVector;
export declare function serializeFeatures(vec: RankerFeatureVector): number[];
export declare function featureSetVersion(): string;
export {};
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