export interface Message {
    role: 'user' | 'assistant' | 'system';
    content: string;
    timestamp: number;
    riskScore: number;
}
export interface ConversationState {
    sessionId: string;
    history: Message[];
    trustScore: number;
    createdAt: number;
    lastUpdatedAt: number;
}
export interface EscalationScore {
    score: number;
    trend: 'increasing' | 'stable' | 'decreasing';
    signals: string[];
}
export interface ConversationTrackerConfig {
    maxHistoryLength?: number;
    sessionTTL?: number;
    maxSessions?: number;
}
/**
 * Tracks conversation state across multiple turns to detect gradual jailbreak attempts
 */
export declare class ConversationTracker {
    private sessions;
    private config;
    constructor(config?: ConversationTrackerConfig);
    /**
     * Add a message to the conversation history
     */
    addMessage(sessionId: string, role: 'user' | 'assistant' | 'system', content: string, riskScore: number): void;
    /**
     * Analyze escalation patterns in the conversation
     * Detects gradual jailbreak: safe → edge → unsafe
     */
    analyzeEscalation(sessionId: string): EscalationScore;
    /**
     * Detect context injection attempts
     * Looks for: role override, contradictions, gaslighting
     */
    detectContextInjection(sessionId: string): {
        detected: boolean;
        signals: string[];
    };
    /**
     * Get conversation state for a session
     */
    getSession(sessionId: string): ConversationState | undefined;
    /**
     * Get current trust score for a session
     */
    getTrustScore(sessionId: string): number;
    /**
     * Delete a session
     */
    deleteSession(sessionId: string): void;
    /**
     * Clean up expired sessions based on TTL
     */
    cleanup(): number;
    /**
     * Clean up old sessions if exceeding max count
     */
    private cleanupOldSessions;
    /**
     * Get statistics about tracked sessions
     */
    getStats(): {
        sessionCount: number;
        totalMessages: number;
        avgTrustScore: number;
    };
    /**
     * Clear all sessions (useful for testing)
     */
    clearAll(): void;
}
export declare const globalConversationTracker: ConversationTracker;