import type { EventDispatcher } from '../events/event-dispatcher.js';
import type { Catalog } from '../catalog/catalog.js';
import type { NodeCodeFactory } from '../node-code/node-code-factory.js';
import type { Context } from '../context/context.js';
import type { Process } from '../process/process.js';
/**
 * Core execution loop.
 *
 * Resolves NodeCode from CatalogNode references, layers configuration
 * (NodeCode defaults → CatalogNode config → ProcessNode config),
 * and runs the directed node graph sequentially.
 */
export declare class ProcessEngine {
    private eventDispatcher;
    private catalog;
    private nodeCodeFactory;
    private cachedNodeCodes;
    constructor(eventDispatcher: EventDispatcher, catalog: Catalog, nodeCodeFactory: NodeCodeFactory);
    /**
     * Clear the node code cache. Call before re-running a process with the same
     * node keys but different catalog_node_key mappings (e.g. chat iterations).
     */
    clearCache(): void;
    process(processDefn: Process, context: Context, startNodeKey?: string): Promise<void>;
    private getConfiguredNodeCode;
    private processNode;
}
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