/**
 * Provenance Extension Group (org.peacprotocol/provenance)
 *
 * Records origin tracking and chain of custody as observations.
 *
 * Design:
 *   - source_type required, open vocabulary for derivation categories
 *   - custody_chain: ordered array of strict nested entries
 *   - slsa: structured object recording SLSA-aligned metadata
 *     (track-based model; does not certify SLSA compliance)
 *   - URI fields are locator hints only; callers MUST NOT auto-fetch
 *   - Observation-only semantics: records events, never enforces policy
 */
import { z } from 'zod';
export declare const PROVENANCE_EXTENSION_KEY: "org.peacprotocol/provenance";
/**
 * A single entry in the custody chain.
 *
 * Records one transfer-of-custody event: who held it, what action
 * occurred, and when. Ordered within the custody_chain array.
 */
export declare const CustodyEntrySchema: z.ZodObject<{
    custodian: z.ZodString;
    action: z.ZodString;
    timestamp: z.ZodISODateTime;
}, z.core.$strict>;
export type CustodyEntry = z.infer<typeof CustodyEntrySchema>;
/**
 * Structured SLSA-aligned provenance metadata.
 *
 * Uses a track-based model rather than a flat scalar.
 * Records metadata; does not certify compliance.
 */
export declare const SlsaLevelSchema: z.ZodObject<{
    track: z.ZodString;
    level: z.ZodNumber;
    version: z.ZodString;
}, z.core.$strict>;
export type SlsaLevel = z.infer<typeof SlsaLevelSchema>;
export declare const ProvenanceExtensionSchema: z.ZodObject<{
    source_type: z.ZodString;
    source_ref: z.ZodOptional<z.ZodString>;
    source_uri: z.ZodOptional<z.ZodString>;
    build_provenance_uri: z.ZodOptional<z.ZodString>;
    verification_method: z.ZodOptional<z.ZodString>;
    custody_chain: z.ZodOptional<z.ZodArray<z.ZodObject<{
        custodian: z.ZodString;
        action: z.ZodString;
        timestamp: z.ZodISODateTime;
    }, z.core.$strict>>>;
    slsa: z.ZodOptional<z.ZodObject<{
        track: z.ZodString;
        level: z.ZodNumber;
        version: z.ZodString;
    }, z.core.$strict>>;
}, z.core.$strict>;
export type ProvenanceExtension = z.infer<typeof ProvenanceExtensionSchema>;
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