/**
 * Purpose Extension Group (org.peacprotocol/purpose)
 *
 * Records external/legal/business purpose declarations as observations.
 * Explicitly separated from PEAC operational purpose tokens
 * (CanonicalPurpose in purpose.ts).
 *
 * Design:
 *   - external_purposes: token-based array (machine-safe, bounded, unique)
 *   - peac_purpose_mapping: optional bridge to PEAC operational tokens
 *     via PURPOSE_TOKEN_REGEX
 *   - No prose-heavy fields at schema layer
 *   - Observation-only semantics: records events, never enforces policy
 */
import { z } from 'zod';
export declare const PURPOSE_EXTENSION_KEY: "org.peacprotocol/purpose";
export declare const PurposeExtensionSchema: z.ZodObject<{
    external_purposes: z.ZodArray<z.ZodString>;
    purpose_basis: z.ZodOptional<z.ZodString>;
    purpose_limitation: z.ZodOptional<z.ZodBoolean>;
    data_minimization: z.ZodOptional<z.ZodBoolean>;
    compatible_purposes: z.ZodOptional<z.ZodArray<z.ZodString>>;
    peac_purpose_mapping: z.ZodOptional<z.ZodString>;
}, z.core.$strict>;
export type PurposeExtension = z.infer<typeof PurposeExtensionSchema>;
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