/**
 * Wire 0.2 RepresentationFields schema
 *
 * Records metadata about the content representation that was observed or served,
 * enabling reproducible content drift detection.
 *
 * Layer 1 (@peac/schema): pure Zod validation, zero I/O.
 *
 * content_hash validation uses stringToFingerprintRef() as the parser gate
 * and additionally requires alg === 'sha256'. The hmac-sha256 algorithm is
 * not permitted for representation hashes (sha256-only by design).
 */
import { z } from 'zod';
/**
 * Normative bounds for Wire 0.2 representation fields.
 *
 * Centralised to prevent magic numbers and allow external reference.
 */
export declare const REPRESENTATION_LIMITS: {
    /** Max content_hash string length (sha256:<64 hex> = 71 chars, capped at FingerprintRef max) */
    readonly maxContentHashLength: 76;
    /** Max content_type string length */
    readonly maxContentTypeLength: 256;
};
/**
 * Zod schema for Wire 0.2 representation fields.
 *
 * All fields are optional; an empty object is valid.
 * Unknown keys are rejected (.strict()).
 *
 * Bounds:
 *   - content_hash: max 76 chars (MAX_FINGERPRINT_REF_LENGTH), sha256-only
 *   - content_type: max 256 chars, conservative MIME pattern
 *   - content_length: non-negative integer, <= Number.MAX_SAFE_INTEGER
 */
export declare const Wire02RepresentationFieldsSchema: z.ZodObject<{
    content_hash: z.ZodOptional<z.ZodString>;
    content_type: z.ZodOptional<z.ZodString>;
    content_length: z.ZodOptional<z.ZodNumber>;
}, z.core.$strict>;
/** Inferred type for Wire 0.2 representation fields */
export type Wire02RepresentationFields = z.infer<typeof Wire02RepresentationFieldsSchema>;
/**
 * Public export alias.
 * Internal name is Wire02RepresentationFieldsSchema to prevent wire-version
 * collisions; exported as RepresentationFieldsSchema for ergonomic use.
 */
export { Wire02RepresentationFieldsSchema as RepresentationFieldsSchema };
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