import type { FlowSchema } from './flow.js';
/** One chart step: from → to, the optional branch label between them
 *  (mandatory for decision branches). */
export type ChartStep = [from: string, to: string] | [from: string, when: string, to: string];
/** Compile a tuple chart into a FlowSchema. */
export declare function flowChart(name: string, steps: ChartStep[], options?: {
    description?: string;
    start?: string;
}): FlowSchema;