/**
 * @copyright Sister Software
 * @license AGPL-3.0
 * @author Teffen Ellis, et al.
 * @file Convert a recipe output written before `recipe`/`register`/`surface` to the current row schema.
 *
 * `recipe` and `base_source_id` are renames of `synth_method` and `synth_base_id`, so they assert no new claim.
 * `register` is `mailwoman-derived-tuples` for every row, because naming a publisher would record inference as fact.
 */
import type { PathBuilderLike } from "path-ts";
import { SurfaceOrigin } from "#types";
/**
 * How each source id's recipe produced its surface.
 *
 * A source absent from this table refuses rather than taking a default.
 */
export declare const RECIPE_SURFACES: Record<string, SurfaceOrigin>;
/**
 * What a migration pass observed.
 */
export interface MigrationSummary {
    rows: number;
    bySource: Record<string, number>;
    alreadyMigrated: number;
}
/**
 * The surface for one source id, refusing a source the table does not name.
 */
export declare function surfaceForSource(source: string): SurfaceOrigin;
/**
 * Rewrite one recipe output onto the current row schema, passing an already-migrated
 * row through untouched so a half-migrated file converges.
 */
export declare function migrateRecipeOutput(input: PathBuilderLike, output: PathBuilderLike): Promise<MigrationSummary>;
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