/**
 * [INPUT]: MemoryEntry/WorkEntry, config weights
 * [OUTPUT]: utility score for eviction ordering
 * [POS]: Implements Utility-Weighted Memory eviction (Ebbinghaus-aligned)
 *
 * Formula: Utility = (w_freq * AccessFrequency + w_impact * BaseImpact) * e^(-lambda * Age)
 * Uses per-entry adaptive strength for the decay component.
 */
import type { MemoryEntry, WorkEntry } from "./types.js";
export interface EvictionWeights {
    accessFrequency: number;
    baseImpact: number;
}
export declare function utilityEntry(e: MemoryEntry, defaultHalfLife: Record<string, number>, w: EvictionWeights): number;
export declare function utilityWork(w: WorkEntry, defaultHalfLife: Record<string, number>, ew: EvictionWeights): number;