/**
 * Spreading Activation System
 *
 * Implements brain-like spreading activation where accessing a memory
 * "primes" related memories, making them easier to recall.
 *
 * EPHEMERAL: This cache is session-only and does not persist to disk.
 * Each MCP server restart starts with a fresh activation state.
 *
 * Based on spreading activation theory in cognitive psychology:
 * - Collins & Loftus (1975) semantic network model
 * - Activation spreads through associative links
 * - Activation decays over time (exponential decay)
 */
/**
 * Activate a memory and spread activation to linked memories
 *
 * When a memory is accessed, it becomes fully activated (1.0).
 * Linked memories receive partial activation based on link strength.
 *
 * @param memoryId - The ID of the memory being accessed
 */
export declare function activateMemory(memoryId: number): void;
/**
 * Get the activation boost for a memory in search scoring
 *
 * Returns 0 if memory is not activated or activation has fully decayed.
 * Returns up to MAX_ACTIVATION_BOOST for fully activated memories.
 *
 * @param memoryId - The ID of the memory to check
 * @returns Activation boost (0 to MAX_ACTIVATION_BOOST)
 */
export declare function getActivationBoost(memoryId: number): number;
/**
 * Get current activation level for a memory (for debugging/dashboard)
 *
 * @param memoryId - The ID of the memory to check
 * @returns Current activation level (0-1) or null if not activated
 */
export declare function getActivationLevel(memoryId: number): number | null;
/**
 * Get all currently activated memories with their levels
 * Useful for dashboard visualization
 *
 * @returns Array of {memoryId, activationLevel} for all activated memories
 */
export declare function getActiveMemories(): Array<{
    memoryId: number;
    activationLevel: number;
}>;
/**
 * Clear the activation cache
 * Useful for testing or manual reset
 */
export declare function clearActivationCache(): void;
/**
 * Prune stale entries from the activation cache
 * Call periodically to prevent memory bloat
 */
export declare function pruneActivationCache(): number;
/**
 * Get activation cache statistics
 */
export declare function getActivationStats(): {
    totalEntries: number;
    activeEntries: number;
    averageActivation: number;
};
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