/**
 * Fisher-matrix methods for EWCConsolidator (compute/penalty/reset/online update).
 * File-size sweep: split out of ewc-consolidation.ts. Mixed into
 * EWCConsolidator.prototype at the bottom of ewc-consolidation.ts.
 *
 * @module v1/cli/memory/ewc-consolidation-fisher
 */
import type { EWCConsolidator } from './ewc-consolidation.js';
export declare const ewcFisherMethods: {
    /**
     * Compute Fisher Information Matrix from gradient history
     * Uses diagonal approximation for efficiency: F_i = E[g_i^2]
     *
     * @param patterns - Array of patterns with their gradients/embeddings
     * @returns Fisher information diagonal
     */
    computeFisherMatrix(this: EWCConsolidator, patterns: {
        id: string;
        embedding: number[];
        success: boolean;
    }[]): number[];
    /**
     * Calculate EWC regularization penalty
     *
     * L_ewc = (lambda/2) * sum_i(F_i * (theta_i - theta_old_i)^2)
     *
     * @param oldWeights - Previous weight values
     * @param newWeights - New weight values
     * @param fisher - Fisher information diagonal (optional, uses global if not provided)
     * @returns Regularization penalty value
     */
    getPenalty(this: EWCConsolidator, oldWeights: number[], newWeights: number[], fisher?: number[]): number;
    /**
     * Reset Fisher matrix (use with caution - allows forgetting)
     */
    resetFisher(this: EWCConsolidator): void;
    /**
     * Update Fisher matrix from pattern confidence changes.
     * Called by SONA after distillLearning to track which patterns
     * are important and should be protected from forgetting.
     *
     * Uses online averaging: F_new = alpha * F_old + (1-alpha) * F_current
     *
     * @param confidenceChanges - Array of {id, embedding, oldConf, newConf}
     */
    updateFisherFromConfidences(this: EWCConsolidator, confidenceChanges: {
        id: string;
        embedding: number[];
        oldConf: number;
        newConf: number;
    }[]): void;
    /**
     * Compute consolidation penalty for a proposed confidence update.
     * Used by SONA to check whether a pattern update would cause forgetting.
     *
     * @param oldConfidence - Current confidence value
     * @param newConfidence - Proposed new confidence value
     * @returns Penalty value (higher = more forgetting risk)
     */
    computeConfidencePenalty(this: EWCConsolidator, oldConfidence: number, newConfidence: number): number;
};
//# sourceMappingURL=ewc-consolidation-fisher.d.ts.map