/** Built-in pi providers with one API-key variable (pi 0.87.1's own table,
 *  docs/providers.md) — used only to name the variable in the error. */
export declare const PI_PROVIDER_KEY_ENV: Readonly<Record<string, string>>;
/**
 * The fatal error for a model pi says it has no usable credential for, or
 * undefined when pi is ready or the check could not tell (see header).
 */
export declare function piAuthPrecheck(bin: string, model: string | undefined, opts: {
    env: Record<string, string>;
    cwd: string;
    signal?: AbortSignal;
}): Promise<Error | undefined>;
/** The fatal "missing API key: set X" error. `piText` is pi's own message. */
export declare function missingApiKeyError(key: {
    provider?: string;
    keyEnv?: string;
}, piText?: string): Error;
/** The missing-key error for pi text (a rejected prompt, or stderr), or
 *  undefined when the text is not pi's no-credential wording. */
export declare function piAuthErrorFromText(text: string, model: string | undefined): Error | undefined;
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