/**
 * Canonical JSON serializer + SHA-256 hash for `case_corrections.target_ref`.
 *
 * Phase 1 of MAMA Case-First Memory System (spec §5.4 Option C).
 *
 * Behavior:
 * - recursively sort object keys in lexicographic UTF-8 order
 * - preserve array order (semantic)
 * - reject undefined values with typed error code `canonicalize.undefined_value`
 * - reject function values with typed error code `canonicalize.function_value`
 * - reject non-finite numbers (NaN, +/- Infinity) with `canonicalize.non_finite_number`
 * - serialize normalized value via JSON.stringify (after normalization)
 * - hash canonical JSON string with SHA-256 over UTF-8 bytes → 32-byte Buffer
 *
 * No top-level await. No ESM-only runtime dependency. Safe for CJS consumers
 * (mcp-server, claude-code-plugin) via package export `./canonicalize`.
 *
 * @module canonicalize
 */
export type CanonicalizeErrorCode = 'canonicalize.undefined_value' | 'canonicalize.function_value' | 'canonicalize.non_finite_number';
export declare class CanonicalizeError extends Error {
    readonly code: CanonicalizeErrorCode;
    constructor(code: CanonicalizeErrorCode, message: string);
}
/**
 * Produce a canonical JSON string for `value`.
 *
 * Two calls with semantically equivalent input produce byte-identical output.
 */
export declare function canonicalizeJSON(value: unknown): string;
/**
 * Produce the 32-byte SHA-256 digest of the canonical JSON form of `value`.
 *
 * Invariant: `targetRefHash(obj)` === `targetRefHash(canonicalizeJSON(obj))`.
 */
export declare function targetRefHash(value: unknown): Buffer;
export declare function targetRefHashCanonicalJSON(canonicalJson: string): Buffer;
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