/**
 * SQLite-Based Conversation Memory System
 * Implements persistent growing memory storage using SQLite as intended
 * Provides 24-hour memory, thematic search, and cross-conversation context
 */
interface ContextResult {
    conversation_id: string;
    curator_content: string;
    question: string;
    created_at: string;
    relevance_score: number;
    context_type: 'recent_24h' | 'thematic' | 'direct_reference';
    confidence_score?: number;
}
interface ConversationContext {
    recent_24h: ContextResult[];
    thematic: ContextResult[];
    formatted_context: string;
    source_count: number;
    memory_summary: string;
}
export declare class SQLiteMemorySystem {
    private lastBackupTime;
    private backupThresholdHours;
    constructor();
    /**
     * Get conversations from the past 24 hours for context
     * Uses SQLite curator_truths table as intended for persistent memory
     */
    getRecent24HourContext(userId?: string): Promise<ContextResult[]>;
    /**
     * Get thematically relevant conversations using SQLite FTS
     * Searches curator_truths_fts table for semantic matches
     */
    getThematicContext(query: string, userId?: string): Promise<ContextResult[]>;
    /**
     * Fallback keyword search when FTS is not available
     */
    private fallbackKeywordSearch;
    /**
     * Build complete conversation context from SQLite persistent memory
     * This is the core function that implements growing memory storage
     */
    buildFullContext(query: string, conversationId: string, userId?: string): Promise<ConversationContext>;
    /**
     * Store curator truth as single source of truth in SQLite
     * This implements the growing memory storage as intended
     */
    storeCuratorTruth(conversationId: string, curatorOutput: string, confidenceScore: number, topicSummary: string): Promise<void>;
    /**
     * Track which context sources were used for a conversation in SQLite
     */
    private trackContextSources;
    /**
     * Format context for inclusion in AI prompts
     */
    private formatContextForPrompt;
    /**
     * Generate a summary of the memory context
     */
    private generateMemorySummary;
    /**
     * Remove duplicate conversations from context
     */
    private deduplicateContext;
    /**
     * Extract meaningful keywords from a query
     */
    private extractKeywords;
    /**
     * Get memory statistics for debugging
     */
    getMemoryStats(): Promise<any>;
    /**
     * Check if automatic backup should be created and trigger if needed
     */
    checkAndCreateAutomaticBackup(): Promise<void>;
    /**
     * Close database connection
     */
    close(): Promise<void>;
}
export declare const sqliteMemory: SQLiteMemorySystem;
export {};
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