import type { SQLiteStore } from '../storage/sqlite.js';
export interface StalenessFactors {
    daysSinceCreation: number;
    daysSinceLastAccess: number;
    accessCount: number;
    hasGraphConnections: boolean;
}
/**
 * Compute a staleness score between 0 (fresh) and 1 (stale).
 *
 * Formula:
 *   base = daysSinceLastAccess / thresholdDays  (clamped to [0, 1])
 *   frequency discount = min(accessCount / 10, 0.3)  — accessed more = less stale
 *   graph discount = 0.1 if entity has graph connections
 *   staleness = max(0, base - frequency discount - graph discount)
 */
export declare function computeStaleness(factors: StalenessFactors, thresholdDays: number): number;
export declare class AccessTracker {
    private sqlite;
    private thresholdDays;
    constructor(sqlite: SQLiteStore, thresholdDays?: number);
    /**
     * Log an access event for one or more memory IDs.
     * Uses synchronous SQLite inserts — fast for single rows.
     */
    logAccess(memoryIds: string[], tool: string, project: string | null): void;
    /**
     * Recalculate staleness scores for all memories.
     * Called periodically (e.g. during consolidation) or via CLI.
     */
    updateAllStaleness(): {
        updated: number;
        averageStaleness: number;
    };
}
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