import * as z from "zod";
/** Optional body formats shared by email-sending actions. */
export declare const OPTIONAL_EMAIL_BODY_SCHEMA: z.ZodObject<{
    html: z.ZodOptional<z.ZodString>;
    markdown: z.ZodOptional<z.ZodString>;
    text: z.ZodOptional<z.ZodString>;
}, z.core.$strip>;
/** Email body with at least one caller-supplied format. */
export declare const EMAIL_BODY_SCHEMA: z.ZodUnion<readonly [z.ZodObject<{
    html: z.ZodNonOptional<z.ZodOptional<z.ZodString>>;
    markdown: z.ZodOptional<z.ZodString>;
    text: z.ZodOptional<z.ZodString>;
}, z.core.$strip>, z.ZodObject<{
    html: z.ZodOptional<z.ZodString>;
    markdown: z.ZodNonOptional<z.ZodOptional<z.ZodString>>;
    text: z.ZodOptional<z.ZodString>;
}, z.core.$strip>, z.ZodObject<{
    html: z.ZodOptional<z.ZodString>;
    markdown: z.ZodOptional<z.ZodString>;
    text: z.ZodNonOptional<z.ZodOptional<z.ZodString>>;
}, z.core.$strip>]>;
type EmailBody = z.output<typeof EMAIL_BODY_SCHEMA>;
/**
 * Whether an object includes at least one email body format.
 *
 * @param input - Optional body formats to inspect.
 */
export declare function hasEmailBody(input: z.output<typeof OPTIONAL_EMAIL_BODY_SCHEMA>): input is EmailBody;
/**
 * Produces complete HTML and plain-text MIME alternatives.
 *
 * @param input - One or more caller-supplied body formats.
 */
export declare function normalizeEmailBody(input: EmailBody): {
    html: string;
    text: string;
};
export {};
//# sourceMappingURL=email.d.ts.map