/**
 * The credentials slice that makes `STTProcessor.resolveHandler` build the
 * provider's handler from the environment as it is NOW, rather than reuse a
 * registry instance built when the process started. The OpenAI-compatible
 * handler additionally honours `OPENAI_BASE_URL`, which file transcription
 * (audio attachments, video audio tracks) has always followed — a gateway
 * that fronts both chat and `/audio/transcriptions`; `OPENAI_STT_BASE_URL`
 * still wins over it. Shared by AudioProcessor and VideoProcessor so the two
 * can never resolve different endpoints.
 */
import type { STTCredentials } from "../types/index.js";
export declare function freshEnvSTTCredentials(credentialsKey: keyof STTCredentials): STTCredentials;