import type { ResourceCtx } from '../../../core/extend-resource.js';
export type DiffAppsOptions = {
    signal?: AbortSignal;
};
export interface DiffRow {
    app1: string | undefined;
    app2: string | undefined;
    prop: string;
}
/**
 * Composite diff of two apps: compares slug checksum, config vars, stack,
 * buildpacks, add-ons, and features, returning one `DiffRow` per differing
 * property.
 *
 * Faithful port of the Heroku CLI's `apps:diff`: `diffFiles` runs first (so a
 * missing app surfaces the `App not found: <app>` error before the rest), then
 * the remaining five diffs run in parallel and their rows are concatenated in
 * the CLI's order. Rendering (truncation, table output) stays with the caller.
 */
export declare function diffApps(ctx: Pick<ResourceCtx, 'platform'>, app1: string, app2: string, options?: DiffAppsOptions): Promise<DiffRow[]>;