import type { EntityIdentityRegistry } from '../types/registry.js';
/**
 * Compute a stable hash of registries for cache key generation.
 *
 * The hash is deterministic regardless of registry order.
 * Uses a simple non-cryptographic hash (djb2) for speed.
 */
export declare function registryKeyHash(registries: EntityIdentityRegistry[]): string;
//# sourceMappingURL=registry-key-hash.d.ts.map