/**
 * SMI-1189: Health Checks
 *
 * Health check and status calculation functions.
 */
import type { SessionHealth, SessionHealthState, SessionHealthStatus, RequiredHealthMonitorConfig } from './health-types.js';
/**
 * Calculate health information for a session state
 *
 * @param state - The session health state
 * @returns SessionHealth object with calculated fields
 */
export declare function calculateHealth(state: SessionHealthState): SessionHealth;
/**
 * Determine new health status based on missed heartbeats
 *
 * @param missedHeartbeats - Number of missed heartbeats
 * @param config - Health monitor configuration
 * @returns New health status
 */
export declare function determineHealthStatus(missedHeartbeats: number, config: RequiredHealthMonitorConfig): SessionHealthStatus;
/**
 * Check if a session has transitioned to a new status
 *
 * @param previousStatus - Previous health status
 * @param currentStatus - Current health status
 * @returns true if status has changed
 */
export declare function hasStatusChanged(previousStatus: SessionHealthStatus, currentStatus: SessionHealthStatus): boolean;
/**
 * Check if status requires an event emission
 *
 * @param status - Current health status
 * @returns true if status is warning, unhealthy, or dead
 */
export declare function isAlertableStatus(status: SessionHealthStatus): boolean;
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