/**
 * Canonical JSON for digests (SPEC.md §11.2) — contractual across
 * implementations: UTF-8, no insignificant whitespace, object keys sorted
 * by code-unit, scope value lists sorted and deduplicated.
 *
 * Used for the scope digest (§3.5) and the `X-Syncular-Scopes` header
 * (§5.5). Hashing itself is the host's job; this module only produces the
 * canonical text.
 */
export declare function canonicalScopeJson(scopes: Readonly<Record<string, readonly string[]>>): string;