llmverify/dist/engines/runtime/baseline.d.ts

AI Output Verification Toolkit — Local-first LLM safety, hallucination detection, PII redaction, prompt injection defense, and runtime monitoring. Zero telemetry. OWASP LLM Top 10 aligned.

/**
 * Baseline Engine
 *
 * Maintains and updates baseline metrics for drift detection.
 * Uses exponential moving average for stability.
 *
 * WHAT THIS DOES:
 * ✅ Tracks average latency, token rate, similarity
 * ✅ Maintains response fingerprint baseline
 * ✅ Uses EMA for smooth baseline updates
 *
 * WHAT THIS DOES NOT DO:
 * ❌ Persist baselines across sessions (in-memory only)
 * ❌ Account for intentional model changes
 * ❌ Distinguish normal variation from anomalies
 *
 * @module engines/runtime/baseline
 * @author Haiec
 * @license MIT
 */
import { CallRecord, BaselineState, ResponseFingerprint } from '../../types/runtime';
/**
 * Manages baseline state for LLM monitoring.
 *
 * @example
 * const baseline = new BaselineEngine();
 *
 * // After each call
 * baseline.update(callRecord, fingerprint, similarity);
 *
 * // Get current baseline
 * const state = baseline.get();
 */
export declare class BaselineEngine {
    private baseline;
    private readonly learningRate;
    private readonly minSamples;
    /**
     * Creates a new BaselineEngine.
     *
     * @param learningRate - EMA learning rate (0-1, default: 0.1)
     * @param minSamples - Minimum samples before baseline is stable (default: 5)
     */
    constructor(learningRate?: number, minSamples?: number);
    /**
     * Updates baseline with new call data.
     *
     * @param call - The call record
     * @param fingerprint - Response fingerprint
     * @param similarity - Similarity score (0-1)
     */
    update(call: CallRecord, fingerprint: ResponseFingerprint, similarity?: number): void;
    /**
     * Gets current baseline state.
     */
    get(): BaselineState;
    /**
     * Checks if baseline has enough samples to be stable.
     */
    isStable(): boolean;
    /**
     * Resets baseline to initial state.
     */
    reset(): void;
    /**
     * Gets sample count.
     */
    getSampleCount(): number;
}