/**
 * Session Knowledge LLM Extractor (FR-A05)
 *
 * Reads session-knowledge-candidates.json (produced by Python preprocessor),
 * sends each cluster's representative segments to an LLM for knowledge extraction,
 * and writes results to the KIVO DB with multi-dimensional tags (FR-B05).
 */
import type { KnowledgeType, KnowledgeNature, KnowledgeFunction } from '../types/index.js';
export declare function cosineSimilarity(a: number[], b: number[]): number;
export interface ExtractedItem {
    content: string;
    nature: string;
    function: string;
    domain: string;
    source: string;
    confidence: number;
    title?: string;
    tags?: string[];
}
export interface SessionExtractOptions {
    candidatesPath: string;
    dryRun?: boolean;
    limit?: number;
    since?: string;
    noQualityGate?: boolean;
}
export interface SessionExtractResult {
    clustersProcessed: number;
    clustersSkipped: number;
    materialsCollected: number;
    knowledgeExtracted: number;
    knowledgeWritten: number;
    tokenEstimate: number;
    errors: string[];
}
export declare const NATURE_TO_TYPE: Record<string, KnowledgeType>;
export declare function validateNature(v: string): KnowledgeNature | undefined;
export declare function validateFunction(v: string): KnowledgeFunction | undefined;
export declare function parseLlmResponse(raw: string): ExtractedItem[];
export declare function estimateTokens(text: string): number;
export declare function extractSessionKnowledge(options: SessionExtractOptions): Promise<SessionExtractResult>;
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