import type { Kysely } from 'kysely';
/**
 * Append-only revision history for content items.
 *
 * A revision is a snapshot of the authored content *after* a save, not a diff against the previous
 * one. Diffs are computed on read, where the two versions being compared are already in hand;
 * storing them instead would make every revision depend on its predecessor surviving, which is
 * exactly the property an append-only log should not have.
 *
 * The snapshot is deliberately the authored content only — title, slug, status, data, seo — and
 * not the derived tree columns (`path`, `depth`, `position`). Those are computed from the slug and
 * the parent at write time, and a restore has to recompute them anyway so descendants and redirects
 * stay consistent. `path` is stored purely so history can show where the item lived at the time.
 */
export declare function up(db: Kysely<any>): Promise<void>;
export declare function down(db: Kysely<any>): Promise<void>;