/**
 * Environment variable that disables external template cache reads and writes.
 *
 * Set to `0`, `false`, `no`, or `off` to bypass the cache.
 */
export declare const EXTERNAL_TEMPLATE_CACHE_ENV = "WP_TYPIA_EXTERNAL_TEMPLATE_CACHE";
/**
 * Environment variable that overrides the external template cache root.
 */
export declare const EXTERNAL_TEMPLATE_CACHE_DIR_ENV = "WP_TYPIA_EXTERNAL_TEMPLATE_CACHE_DIR";
/**
 * Environment variable that enables TTL-based external template cache pruning.
 *
 * Unset, empty, zero, negative, and non-numeric values keep pruning disabled.
 */
export declare const EXTERNAL_TEMPLATE_CACHE_TTL_DAYS_ENV = "WP_TYPIA_EXTERNAL_TEMPLATE_CACHE_TTL_DAYS";
/**
 * Environment variable that overrides how often TTL pruning may scan the cache.
 *
 * Unset values use the default interval. Zero, negative, and non-numeric values
 * disable scan throttling.
 */
export declare const EXTERNAL_TEMPLATE_CACHE_PRUNE_INTERVAL_MS_ENV = "WP_TYPIA_EXTERNAL_TEMPLATE_CACHE_PRUNE_INTERVAL_MS";
/**
 * Checks whether remote external template source caching is enabled.
 *
 * Caching is enabled by default. Set `WP_TYPIA_EXTERNAL_TEMPLATE_CACHE` to
 * `0`, `false`, `no`, or `off` to force uncached resolution.
 *
 * @param env Environment object to inspect, defaulting to `process.env`.
 * @returns Whether external template source cache reads and writes are enabled.
 */
export declare function isExternalTemplateCacheEnabled(env?: NodeJS.ProcessEnv): boolean;
/**
 * Resolves the external template source cache root directory.
 *
 * `WP_TYPIA_EXTERNAL_TEMPLATE_CACHE_DIR` overrides the location. Without an
 * override, wp-typia uses a per-user `wp-typia-template-source-cache-*`
 * directory inside the operating system temp directory.
 *
 * @param env Environment object to inspect, defaulting to `process.env`.
 * @returns Absolute cache root directory path.
 */
export declare function getExternalTemplateCacheRoot(env?: NodeJS.ProcessEnv): string;
export declare function resolveExternalTemplateCacheTtlMs(options?: {
    env?: NodeJS.ProcessEnv;
    ttlDays?: number;
}): number | null;
export declare function resolveExternalTemplateCachePruneIntervalMs(options?: {
    env?: NodeJS.ProcessEnv;
    pruneIntervalMs?: number;
}): number | null;
export declare function getExternalTemplateCacheNowMs(now: Date | number | undefined): number;