import { Core } from '@strapi/strapi';
export declare function getDryRunTtsMp3Buffer(): Buffer;
/**
 * When `STRAPI_NARRATION_TTS_DRY_RUN` is set to a non-empty value, it wins over plugin config.
 * Truthy: `1`, `true`, `yes`, `on` (case-insensitive). Falsy: `0`, `false`, `no`, `off`.
 * Other non-empty values are ignored (returns `null`) so the plugin config `ttsDryRun` still applies.
 */
export declare function parseNarrationTtsDryRunEnv(raw: string | undefined): boolean | null;
export declare function isTtsDryRunEnabled(strapi: Core.Strapi): boolean;