/**
 * STT-only environment keys — all prefixed `AGIM_STT_` so they never
 * collide with LLM vendor envs (OPENAI_API_KEY, STEPFUN_API_KEY,
 * AGIM_ZHIPU_API_KEY, MIMO_API_KEY, …).
 *
 * No legacy short-name fallbacks: STT has not shipped publicly yet.
 */
/** Canonical STT env names. Built via helper so secret scanners do not rewrite key literals. */
export declare const STT_ENV: {
    readonly provider: "AGIM_STT_PROVIDER";
    readonly openaiApiKey: "AGIM_STT_OPENAI_API_KEY";
    readonly openaiBaseUrl: "AGIM_STT_OPENAI_BASE_URL";
    readonly openaiModel: "AGIM_STT_OPENAI_MODEL";
    readonly iflytekAppId: "AGIM_STT_IFLYTEK_APP_ID";
    readonly iflytekApiKey: "AGIM_STT_IFLYTEK_API_KEY";
    readonly iflytekApiSecret: "AGIM_STT_IFLYTEK_API_SECRET";
    readonly tencentSecretId: "AGIM_STT_TENCENT_SECRET_ID";
    readonly tencentSecretKey: "AGIM_STT_TENCENT_SECRET_KEY";
    readonly tencentEngine: "AGIM_STT_TENCENT_ENGINE";
    readonly baiduApiKey: "AGIM_STT_BAIDU_API_KEY";
    readonly baiduSecretKey: "AGIM_STT_BAIDU_SECRET_KEY";
    readonly stepfunApiKey: "AGIM_STT_STEPFUN_API_KEY";
    readonly stepfunBaseUrl: "AGIM_STT_STEPFUN_BASE_URL";
    readonly stepfunModel: "AGIM_STT_STEPFUN_MODEL";
    readonly mimoApiKey: "AGIM_STT_MIMO_API_KEY";
    readonly mimoBaseUrl: "AGIM_STT_MIMO_BASE_URL";
    readonly mimoModel: "AGIM_STT_MIMO_MODEL";
    readonly zhipuApiKey: "AGIM_STT_ZHIPU_API_KEY";
    readonly zhipuBaseUrl: "AGIM_STT_ZHIPU_BASE_URL";
    readonly zhipuModel: "AGIM_STT_ZHIPU_MODEL";
    readonly whisperBin: "AGIM_STT_WHISPERCPP_BIN";
    readonly whisperModel: "AGIM_STT_WHISPERCPP_MODEL";
    readonly whisperArgs: "AGIM_STT_WHISPERCPP_ARGS";
};
/** SPA-editable STT keys (canonical AGIM_STT_* only — no LLM shared names). */
export declare const STT_EDITABLE_ENV_KEYS: readonly string[];
/** Secret-ish STT keys (masked on GET /api/env). */
export declare const STT_SECRET_ENV_KEYS: readonly string[];
/** Non-secret values safe to echo into the settings UI. */
export declare const STT_ECHOABLE_ENV_KEYS: ReadonlySet<string>;
export declare function sttEnv(name: keyof typeof STT_ENV): string | undefined;
export declare function sttEnvPrimary(name: keyof typeof STT_ENV): string;
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