import { z } from 'zod';
/**
 * Message-level structured meta payload envelope stored under `message.meta.happier`.
 *
 * UI renderers must Zod-parse `payload` by kind and never deep-merge untrusted objects.
 */
export declare const HappierMetaEnvelopeSchema: z.ZodObject<{
    kind: z.ZodString;
    payload: z.ZodUnknown;
}, z.core.$strip>;
export type HappierMetaEnvelope = z.infer<typeof HappierMetaEnvelopeSchema>;
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