/**
 * Demo seed service — creates a realistic demo dataset (clients + invoices)
 * so InvoiceFlow can be evaluated via MCP Inspector without real Stripe,
 * SendGrid, or PayPal credentials. Every call generates a fresh batch with
 * unique IDs; safe to call multiple times.
 */
import { Storage } from './storage.js';
export interface DemoSeedResult {
    clients: number;
    invoices: number;
    paid_invoices: number;
    overdue_invoices: number;
    total_invoiced: number;
    total_collected: number;
    client_ids: string[];
    sample_invoice_ids: string[];
    message: string;
}
/**
 * Populate the store with demo clients and invoices covering multiple
 * archetypes: on-time payers, chronic-late payers, high-value clients,
 * and new relationships. Every tool (invoice_list, invoice_risk,
 * cashflow_report, payment_reconcile, etc.) will return meaningful
 * results against this dataset without needing real Stripe/PayPal keys.
 */
export declare function seedDemoData(store?: Storage): Promise<DemoSeedResult>;