import type { Dialect, SchemaSnapshot } from "../types.js";
/**
 * Committed reference-snapshot path for a dialect, e.g.
 * `<migrationsDir>/.schema.postgres.json`. d1 shares sqlite's schema, so both
 * map to `.schema.sqlite.json`.
 */
export declare function snapshotPath(migrationsDir: string, dialect: Dialect): string;
/** Read + parse the snapshot, or null if the file is absent. */
export declare function readSnapshot(path: string): Promise<SchemaSnapshot | null>;
/** Serialize + write the snapshot, creating the parent directory if needed. */
export declare function writeSnapshot(path: string, snapshot: SchemaSnapshot): Promise<void>;
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