import type { Snapshot } from '../snapshot/types.js';
import type { SnapshotDiffResult } from './types.js';
/**
 * Computes migration operations needed to move from one snapshot to another.
 *
 * The diff layer is deliberately SQL-free. It emits structured operations,
 * warnings for potentially expensive changes, and unsupported-change diagnostics
 * that the SQL renderer refuses to render automatically.
 */
export declare function diffSnapshots(previousSnapshot: Snapshot, nextSnapshot: Snapshot): SnapshotDiffResult;
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