export declare const DEFAULT_ENGINE_START_TIMEOUT_MS = 120000;
export declare const DEFAULT_BACKEND_PROBE_TIMEOUT_MS = 60000;
export declare const DEFAULT_ENGINE_SHUTDOWN_TIMEOUT_MS = 60000;
export declare const DEFAULT_ENGINE_CONTROL_REQUEST_TIMEOUT_MS = 5000;
/**
 * Lifecycle timeout environment values are expressed in seconds so operators
 * do not need to work with large millisecond values in PowerShell or service
 * configuration.
 */
export declare function readPositiveSecondsAsMs(name: string, fallback: number, env?: NodeJS.ProcessEnv): number;
export declare function resolveEngineStartTimeoutMs(env?: NodeJS.ProcessEnv): number;
export declare function resolveBackendProbeTimeoutMs(env?: NodeJS.ProcessEnv): number;
export declare function resolveEngineShutdownTimeoutMs(env?: NodeJS.ProcessEnv): number;
/** Leave time for backend cleanup, DB close, process-state cleanup, and exit. */
export declare function resolveInFlightShutdownTimeoutMs(env?: NodeJS.ProcessEnv): number;