/**
 * Schema Watcher (P6 — End-to-End Type Safety)
 *
 * Watches the Zveltio engine for DDL schema changes via WebSocket and
 * regenerates a TypeScript types file whenever a collection is created,
 * updated, or deleted.
 *
 * Usage (in `zveltio dev --watch`):
 *   import { watchSchema } from '@zveltio/sdk/schema-watcher';
 *   await watchSchema('http://localhost:3000', './src/zveltio-types.d.ts');
 */
export interface CollectionField {
    name: string;
    type: string;
    required?: boolean;
}
export interface CollectionSchema {
    name: string;
    display_name?: string;
    fields: CollectionField[];
}
export interface WatchSchemaOptions {
    /** API token for the engine (admin key) */
    apiKey?: string;
    /** Reconnect delay in ms (default: 3000) */
    reconnectDelay?: number;
    /** Called after each successful type regeneration */
    onUpdate?: (collections: CollectionSchema[]) => void;
    /** Called on connection errors */
    onError?: (err: Error) => void;
}
/**
 * Start watching the engine's WebSocket for schema changes and regenerate
 * TypeScript types at `outputPath` whenever the schema changes.
 *
 * Returns a cleanup function that closes the WebSocket.
 */
export declare function watchSchema(engineUrl: string, outputPath: string, options?: WatchSchemaOptions): Promise<() => void>;
/** One-shot type generation without watching. */
export declare function generateTypes(engineUrl: string, outputPath: string, apiKey?: string): Promise<void>;
//# sourceMappingURL=schema-watcher.d.ts.map